This dataset contains information about rice accessions screened for resistance to bacterial leaf blight (BLB). These accessions are currently conserved at MARDIs rice genebank. Plant breeders and scientists use the information contained in this dataset for identifying potential rice accessions to be included in their plant breeding programs. The evaluation was performed in the field during the main planting season 2014/2015. ...
Weedy rice is a serious problem of cultivated rice in most of the rice-growing areas in Asia, causing increased production costs and yield losses in rice. A study was conducted to determine the response of weedy rice accessions from India (IWR), Malaysia (MWR), Thailand (TWR), and Vietnam (VWR) to seed burial and flooding depths. The greatest emergence for each weedy rice accession (97% for IWR, 82% for MWR, 97% for TWR, and 94% for VWR) was observed in seeds placed on the soil surface. Seedling emergence decreased with increase in burial depth. For the IWR accession, 0.5% of the seedlings emerged from 8-cm depth, whereas for the other three weedy rice accessions, no seedlings emerged from this depth. When seeds were sown on the soil surface, flooding depth ranging from 0 to 8 cm had no or very little effect on seedling emergence of different weedy rice accessions. On the other hand, flooding decreased seedling emergence in all weedy rice accessions when seeds were sown at 1 cm deep into the ...
TY - JOUR. T1 - Inorganic arsenic in rice-based products for infants and young children. AU - Signes-Pastor, Antonio J.. AU - Carey, Manus. AU - Meharg, Andrew A.. N1 - Copyright © 2015 The Authors. Published by Elsevier Ltd.. All rights reserved.. PY - 2016/1/15. Y1 - 2016/1/15. N2 - Inorganic arsenic (Asi) is a chronic, non-threshold carcinogen. Rice and rice-based products can be the major source of Asi for many subpopulations. Baby rice, rice cereals and rice crackers are widely used to feed infants and young children. The Asi concentration in rice-based products may pose a health risk for infants and young children. Asi concentration was determined in rice-based products produced in the European Union and risk assessment associated with the consumption of these products by infants and young children, and compared to an identical US FDA survey. There are currently no European Union or United States of America regulations applicable to Asi in food. However, this study suggests that the ...
Grain (seed) of brown rice, GMO (Oryza sativa), coloured scanning electron micrograph (SEM). A grain of rice is the seed from the rice plant (Oryza sativa). There are two layers around the rice seed, the aleurone layer (brown), and a dry husk (pericarp, black). Husked rice is known as brown rice. Most of the vitamins and protein of the original seed are found in the outer layers. Milling and polishing removes the outer layers from the rice grain to eventually yield white rice. Removing the two outer rice layers changes the taste and degrades the nutritional value of the rice. Rice is the second most important crop in the world (wheat being first). This brown rice strain has been genetically modified (GMO). Magnification: x5.8 when shortest axis printed at 25 millimetres. - Stock Image C032/4357
Crop domestications are long-term selection experiments that have greatly advanced human civilization. The domestication of cultivated rice (Oryza sativa L.) ranks as one of the most important developments in history. However, its origins and domestication processes are controversial and have long been debated. Here we generate genome sequences from 446 geographically diverse accessions of the wild rice species Oryza rufipogon, the immediate ancestral progenitor of cultivated rice, and from 1,083 cultivated indica and japonica varieties to construct a comprehensive map of rice genome variation. In the search for signatures of selection, we identify 55 selective sweeps that have occurred during domestication. In-depth analyses of the domestication sweeps and genome-wide patterns reveal that Oryza sativa japonica rice was first domesticated from a specific population of O. rufipogon around the middle area of the Pearl River in southern China, and that Oryza sativa indica rice was subsequently ...
OsSLI1, a Homeodomain Containing Transcription Activator, Involves Abscisic Acid Related Stress Response in Rice Oryza sativa L.. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
Rice production may have started in Brazil only a few hundred years ago, but today the country is the worlds 10th largest rice producer. In Latin America and the Caribbean, Brazil is the largest producer of rice. Nevertheless, Brazil is also a major rice importer. The State of Rio Grande do Sul is the main centre of rice production. There, rice farming is practiced under a sub-tropical climate on large and completely mechanized farms averaging 200 ha in size. In the nearby state of Santa Catarina, the average farm size is only 10 ha and the use of family manual labour is common. Rice is grown in all Brazilian states with tropical climates. Initially, japonica varieties were introduced, but after 1980 locally bred indica varieties of the IR8-type became dominant. In the early years of the opening of the Cerrado - or savannah - areas, upland rice was the pioneer crop and occupied most of the total rice area. The area planted with upland rice reached its peak (about 4.5 million ha) in 1988, then ...
BACKGROUND: The availability of thousands of complete rice genome sequences from diverse varieties and accessions has laid the foundation for in-depth exploration of the rice genome. One drawback to these collections is that most of these rice varieties have long life cycles, and/or low transformation efficiencies, which limits their usefulness as model organisms for functional genomics studies. In contrast, the rice variety Kitaake has a rapid life cycle (9 weeks seed to seed) and is easy to transform and propagate. For these reasons, Kitaake has emerged as a model for studies of diverse monocotyledonous species. RESULTS: Here, we report the de novo genome sequencing and analysis of Oryza sativa ssp. japonica variety KitaakeX, a Kitaake plant carrying the rice XA21 immune receptor. Our KitaakeX sequence assembly contains 377.6 Mb, consisting of 33 scaffolds (476 contigs) with a contig N50 of 1.4 Mb. Complementing the assembly are detailed gene annotations of 35,594 protein coding genes. We ...
The present invention relates to an insect resistant transgenic rice plant, plant cell, seed and progeny thereof comprising a polynucleotide sequence encoding a Cry1Ac protein specific to PE-7 event. The invention also provides a process for detecting the presence of PE-7 event in transgenic rice plant. The invention further provides a kit for identifying the transgenic plants comprising the PE-7 event.
Citation: Gealy, D.R., Agrama, H.A., Eizenga, G.C. 2009. Exploring genetic and spatial structure of U.S. weedy red rice (Oryza sativa) in relation to rice relatives worldwide. Weed Science. 57:627-643. DOI: 10.1614/WS-09-018.1. Interpretive Summary: Weedy red rice (Oryza sativa) damages rice production and quality in the U.S., and increasingly, throughout the world. Effective control of red rice is difficult because populations in the U.S. can be biologically diverse in different geographic regions, red rice is genetically and physiologically very similar to the rice (Oryza sativa) crop it infests, and it can intercross with crop rice. We aimed to use DNA markers (fingerprinting) to determine genetic differences between U.S. red rice red rice populations, U.S. rice varieties, and close relatives found throughout the world, and to determine whether the different genetic groupings could be structured to reveal the presence of potential ancestral and/or geographical relationships. Twenty-five of ...
The launch of a high-yielding dwarf rice variety by the International Rice Research Institute (IRRI) on Nov 28, 1966 marked the beginning of Asia s struggle for freedom from hunger. Perhaps drawn by the promise of the miracle rice the IR8 rice variety -- the Food and Agriculture Organisation of the United Nations (FAO) dedicated 1966 as the International Rice Year. Thirty-eight years later, as the United Nations dedicates 2004 to the world s most important staple food once again, celebrating it as the International Year of Rice, the starchy grain has undergone a complete metamorphosis. In 1966, the miracle rice seeds that ushered in the green revolution belonged to the species Oryza sativa -- a mankind s heritage. Since the time the indica variety of wild rice was known to be growing in the northern and southern slopes of the Himalayas and that was some 15,000 years ago rice has been regarded as probably God s greatest gift to human society. Staple food for more than half the world s population, ...
Investigating Partners of Rice Transcription Factors and their Target Genes During Rice Floret Development (3 month studentship) lead partner Indian Institute of ...
Rice (Oryza sativa) is critical for human nutrition worldwide. Due to a growing population, cultivars that produce high yields in high salinity soil are of major importance. Here we describe the discovery and molecular characterization of a novel sea water adapted rice strain, Sea Rice 86 (SR86). SR86 can produce nutritious grains when grown in high salinity soil. Compared to a salt resistant rice cultivar, Yanfen 47 (YF47), SR86 grows in environments with up to 3X the salt content, and produces grains with significantly higher nutrient content in 12 measured components, including 2.9X calcium and 20X dietary fiber. Whole genome sequencing demonstrated that SR86 is a relatively ancient indica subspecies, phylogenetically close to the divergence point of the major rice varietals. SR86 has 12 chromosomes with a total genome size of 373,130,791 bps, slightly smaller than other sequenced rice genomes. Via comparison with 3000 rice genomes, we identified 42,359 putative unique, high impact variants in SR86.
Rice is a cereal plant and staple food for most Indonesian people. One of the causes of the problem is decrease of wetland and lowland area which have impact on national level production. One of the efforts to increase rice production is selection to get desired trait. Regression and correlation analysis to determined the relationship among characters that can be used as a consideration for selection criterion. The purpose of this study is to know the relationships between morphological and agronomic characters in rice plant of F2 generation. This study was conducted at the Experimental Faculty of Agriculture, University of Brawijaya, Jatimulyo Village, Malang, between June and August 2018. Planting materials were population of F2 generation (SBCH, SBCB, TWCH dan TWCB). All of the populations planted in area 25 m x 3 m with spacing 60 cm x 60 cm. Based on the result, all of the populations showed that there was positif linear relationship between plant height and panicle length, number of ...
For those of us that live in countries where rice porridge or rice pudding is a common food, a have a good alternative to the expensive real japanese rice.. Here in Denmark, you will find that the cheapest rice is called grødris which translates to porridge rice. It is used for making rice pudding and is normally boiled in milk until it becomes mushy.. However if you study the product declaration you will actually see that the rice is japonica rice, though neither from Japan nor California, but often southern Europe. Surely, the quality is far from that of real Japanese rice, but the texture and stickiness is about the same if you follow the ratios of water and rice of Japanese rice, and you must remember to wash the rice very well (and much more than Japanese rice). The flavour is tolerable, but I cannot recommend it for use in sushi or other dishes where rice flavour is very important. It can however be used for omusubi if you use fillings and maybe some furikake. For curry and the like that ...
For those of us that live in countries where rice porridge or rice pudding is a common food, a have a good alternative to the expensive real japanese rice.. Here in Denmark, you will find that the cheapest rice is called grødris which translates to porridge rice. It is used for making rice pudding and is normally boiled in milk until it becomes mushy.. However if you study the product declaration you will actually see that the rice is japonica rice, though neither from Japan nor California, but often southern Europe. Surely, the quality is far from that of real Japanese rice, but the texture and stickiness is about the same if you follow the ratios of water and rice of Japanese rice, and you must remember to wash the rice very well (and much more than Japanese rice). The flavour is tolerable, but I cannot recommend it for use in sushi or other dishes where rice flavour is very important. It can however be used for omusubi if you use fillings and maybe some furikake. For curry and the like that ...
China is one of the original centres of rice cultivation. It is the worlds largest rice producer, and is the pioneer of hybrid rice. In the North China plains, the rice season is from May/June to August/September.. In the Yangtze River Valley, rice is planted from April to June and harvested from August to October. In south-eastern China, the early (March to July) and late (June to November) rice crops are bountiful. In most parts of Yunan, the rice season is generally long, from March to September. Indica rice (Hsien) is dominant in the south, while japonica rice (Keng) is widely planted in the north. Also, aromatic, glutinous and other special types of rice are widely planted. The commercial cultivation of hybrid rice has allowed about two million hectares of ricelands to be diversified to other uses, which helps increase farmers incomes. Rice production, post-harvest activities and the processing of rice into other products provide the main source of employment and income for at least 50 ...
Barnyard grass, such as Echinochloa crus-galli var. mitis, Echinochloa crus-galli var. zelayensis and Echinochloa colonum, are the main troublesome weeds in rice (Oryza sativa) paddies. This study aimed to investigate the rice yield (quality and quantity) when grown with these common barnyard grass varieties. A 2-year field experiment was conducted using two high-yielding rice cultivars, Liangyoupeijiu (an O. sativa indica hybrid cultivar) and Nanjing 9108 (an O. sativa japonica cultivar) at different develop-mental stages from transplant to maturity. Treatments included a weed-free (control), rice grown with Echinochloa. crus-galli var. mitis (Ecm), rice grown with E. crus-galli var. zelayensis (Ecz), and rice grown with E. colonum (Ec). The results showed that when barnyard grasses were grown with the same rice cultivar, the order of plant height of the three barnyard grass varieties was Ecz , Ecm , Ec, the growth duration was Ecm , Ecz , Ec and the dry matter accumulation of both Ecm and Ecz ...
  The response of rice crop to water application is of paramount importance to researchers as it helps in determining its agronomic development. The study was aimed at establishing the agronomic responses of rice crop to differential water supply. A two-year dry season experiment was conducted at the research farm of International Institute of Tropical Agriculture, IITA Ibadan, Nigeria. Two upland rice varieties (NERICA 2 and NERICA 4) were planted on a 5 × 5 m plot in a randomized complete block design with four treatments based on different water application. Agronomic parameters such as plant height, root depth, canopy shading, leaf area index, panicle and tiller configuration, biomass and grain yield in relation to crop water use were obtained and the results were subjected to statistical analysis. Maximum plant height (89.0 and 100.3 cm), maximum root depth (22.1 and 23.8 cm), panicle diameter (3.9 and 4.5 cm), panicle length (26.1 and 25.7 cm), leaf area index (LAI) 3.27 and 3.95
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The plasmid pE10 is a pBR322-derived plasmid carrying a 4.5 kb rice (Oryza sativa L.) repeated DNA sequence. The cloned sequence has been shown to be amplified in cultured rice cells. The analysis of practically intact chromosomal rice DNA molecules by pulsed field gel electrophoresis has now shown that the amplification is associated with the appearance of extrachromosomal molecules. In fact, pE10 hybridizes exclusively with unfractionated DNA from leaf protoplasts, while it recognizes predominantly an extrachromosomal DNA molecule (ECD) of about 45 kb and its multiples in the case of protoplasts from cultured cells. Insensitivity to the action of the exonuclease Bal31 suggests that the molecule is circular. Analysis of restriction endonuclease products with both standard horizontal and pulsed field gel electrophoresis suggest that the extrachromosomal DNA, and its chromosomal counterpart, is composed of tandemly repeated units of about 7 kb. Thus, the smaller extrachromosomal circle should ...
In the study, the researchers tested black rice bran grown in the Southern United States. Although brown rice is the most common rice variety produced worldwide, Xu said the study results suggest that black rice bran may be healthier than brown rice bran in terms of antioxidants. In Asia, black rice is most commonly used for food decoration, such as in noodles or sushi. One variety of black rice is known as "Forbidden Rice" because in Ancient China, it was only permitted to be eaten by nobles and no one else, according to background information in the news release.The study results were scheduled to be released Thursday at the national meeting of the American Chemical Society in Boston ...
RiceGE : Rice Functional Genomics Database. gebd Rice Genome Browser. iSect Tools, iView Tools and Gene Expression Atlas. Collection of Rice T-DNA/Ds, Rice cDNA, Marker, EST, MPSS, SAGE, Arabidopsis, Maize, Wheat, Barley Homology, Rice Tiling Array and Gene Expression Data. Created and developed by Huaming Chen
RiceGE : Rice Functional Genomics Database. gebd Rice Genome Browser. iSect Tools, iView Tools and Gene Expression Atlas. Collection of Rice T-DNA/Ds, Rice cDNA, Marker, EST, MPSS, SAGE, Arabidopsis, Maize, Wheat, Barley Homology, Rice Tiling Array and Gene Expression Data. Created and developed by Huaming Chen
Jarrow Formulas Brown Rice Protein Concentrate Chocolate Flavor 18.8oz Caertified Organic Jarrow Formulas Brown Rice Protein Concentrate, made from whole grain organic brown rice, is easily digested, gluten-free, hypoallergenic, and a vegetarian/vegan source of protein. Highlights: Naturally Hypoallergenic & Gluten Free Vegan/Vegetarian Safe & Non-GMO 70% Easily Mixable Protein Complete Amino Acid Profile Protein quality scores exceeding 100% No Artificial Flavors or Sweeteners Vanilla, Chocolate & Mixed Berry Flavors Ideal: As a high-protein alternative to soy and animal products. For those with gastrointestinal sensitivity to milk, wheat, soy and other proteins. Jarrow Formulas Brown Rice Protein Concentrate is made using an all natural process that does not use chemical solvents. A special milling step produces a smooth texture that mixes easier and is less gritty than traditional rice protein preparations. Jarrow Formulas
In this study, we analyzed DNA sequence polymorphisms in and around the genomic region of Pi-ta in 159 geographically diverse Oryza accessions composed of several Oryza species to gain insight into the origin and evolution of Pi-ta. We discovered that the extended genomic region (,5 Mb) surrounding resistant Pi-ta was consistently maintained in resistant accessions to M. oryzae containing AVR-Pita. Significantly, one of the largest linkage blocks of resistant Pi-ta was identified in backcrossing and elite rice cultivars (Jia 2009). The identification of a large linkage block around Pi-ta raised at least two possibilities. First, other blast R genes in the Pi-ta region also introgressed into diverse elite rice cultivars. Other R genes such as Pi-ta2, Pi39, and Pi20(t) (Rybka et al. 1997; Liu et al. 2007; Li et al. 2008) were also mapped at the Pi-ta region, but it was unknown if these and/or other unknown R genes were clustered in the Pi-ta region that have been introgressed as a large linkage ...
Rice (Oryza sativa) is the first grass species to be sequenced, and as of September 2002, there are four draft genome sequences available. All four drafts are available to the academic community, although two drafts have some limitations with respect to access and distribution. Although none of the four draft sequences is complete, they collectively provide our first view of the landscape and the content of a monocot genome.. The first rice genome sequence made accessible in large tracts was that of the O. sativa subsp japonica cv Nipponbare generated by the International Rice Genome Sequencing Project (IRGSP;Sasaki and Burr, 2000), an international consortium of public laboratories. Using a bacterial artificial chromosome (BAC)-by-BAC approach, the IRGSP has generated draft sequence of 3,083 BAC or P1 artificial chromosome (PAC) clones that is available through GenBank/DNA data bank of Japan (DDBJ)/EMBL (as of September 17, 2002). These 3,083 BAC/PAC clones represent 426 Mb of sequence, and ...
A study was conducted to estimate the extant of heterobeltiosis, standard heterosis and the nature of gene action for some quantitative traits using line x tester analysis. Among the parents, M1-10-29VL and TM07280 were the best performing parents for seed yield per plant and its components traits. Cross combinations IR77629-72-2-1-3 X IR64, Basmati 370 X CR2703, Sonam X NDR118 and IR7734-4-0 X CR2703 exhibited high significant effects with high per se performance and standard heterosis over PHB71. High magnitude of heterobltiosis and standard heterosis were observed for almost all characters. Cross combinations M1-10-29 VL X NDR118, Basmati 370 X CR2703, TM07280 X NDR118, IR77629 -72-2-1-3 X IR-64 and TM07280 X IR-64 exhibited highly significant heterosis over PHB71.. ...
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Genome researchers has concluded in a study through large-scale gene re-sequencing indicate that domesticated rice may have first appeared as far back as approximately 9,000 years ago in the Yangtze Valley of China.. Asian rice, Oryza sativa, is one of worlds oldest crop species. Two major subspecies of rice, japonica and indica, represent most of the worlds varieties. One theory, a single-origin model, suggests that indica and japonica were domesticated once from the wild rice O. rufipogon.. Another theory, a multiple-origin model, proposes that these two major rice types were domesticated separately and in different parts of Asia. However, using more modern computer algorithms,the researchers concluded these two species have the same origin because they have a closer genetic relationship to each other than to any wild rice species found in either India or China.. The studys authors also examined the phylogeny of domesticated rice by re-sequencing 630 gene fragments on selected chromosomes ...
HarvestPlus is pleased to cross-post this article originally publshed by Rice Today, a publication of the International Rice Research Institute.. Mallikarjuna Swamy, head of the Healthier Rice Breeding Group at the International Rice Research Institute (IRRI), shares his thoughts on the role of science in solving malnutrition, particularly zinc deficiency.. "More than two billion people in the world are malnourished and most of them live in rice-consuming Asian countries," says Dr. Swamy. He adds, however, that huge opportunities exist to improve the nutritional content of rice varieties to solve the micronutrient-deficiency problem. Scientists at IRRI and its partners are working together to bring solutions such as the high-zinc rice varieties that have been released in the Philippines and Bangladesh.. A molecular biologist, Dr. Swamy joined IRRI in 2009 and served as a postdoctoral fellow in a rice breeding program on drought. He identified quantitative trait loci and introduced these into ...
Many epidemiologic trials show that refined starches as in polished rice increase the risk of type 2 diabetes by 11% per 250 g serving. When this is substituted with brown rice, this risk falls. Asians are at a higher risk of diabetes (55%) because of the greater postprandial rises in glucose and in insulin after a carbohydrate load, which is called the Asian phenotype, and is a potential precursor for the metabolic syndrome. This is made more significant by the fact that over half of the calories in the Asian diet come from starches and sugars of one kind or the other, and 83% as highly refined carbohydrates. The rising incidence rates of diabetes in Asia reflect this phenomenon, with the prevalence rising from 1% to 10% within 13 years in China, mostly among the middle-aged class, for instance. Thus, the shift from the consumption of unpolished rice to white rice has serious public health consequences ...
Kabir, M. E.; Iftekharuddaula, K. M.; Khan, M. A. I.; Mian, M. A. K.; and Ivy, N. A. 2017. Marker assisted introgression of bacterial blight resistant gene into submergence tolerance rice variety BRRI dhan52. Bangladesh Journal of Agricultural Research 42(3): 403-411. http://dx.doi.org/10.3329/bjar.v42i3.34499 ...
When you eat rice, its likely that you are ingesting the white variety. While there is no reason to panic about eating white rice in moderation, if its a diet staple there could be something to be concerned about.. Harvard researchers are pointing to the considerable benefits of switching from white to brown rice, particularly how it relates to preventing diabetes. They are saying by making the easy switch to brown rice, you can cut your diabetes risk by a third.. White rice creates the strong possibility of developing diabetes since it causes spikes in blood sugar levels. In the study of nearly 200,000 Americans, eating white rice was linked to type 2 diabetes.. The researchers came up with a calculation of how brown rice could reduce diabetes rates. They estimated that replacing one-third of a normal serving of white rice with the same amount of brown rice would lead to a lowering of the risk of type 2 diabetes by 16 percent.. Since brown rice is a whole grain food, it is high in fiber and ...
Full nutritional breakdown of the calories in Brown Rice, Red Rice & Barley Pilaf based on the calories and nutrition in each ingredient, including Pearl Barley raw, Bhutanese Red Rice, Olive Oil, Brown Rice, medium grain, Pacific Natural Vegetable Broth and the other ingredients in this recipe.
cv Koshihikari and Nipponbare, both temperate japonica Japanese rice cultivars, are genetically closely related (Nagasaki et al., 2010). Their seeds are similar in shape (Fig. 4A), but measuring them has previously proved difficult. As such small differences are sometimes very important to market value, detailed genetic analysis, including gene isolation, is necessary. Using SmartGrain, we could readily detect small differences in seed shape between these two cultivars. Subsequent QTL analysis in cv Koshihikari/Nipponbare BILs based on more than 12,700 seeds detected several QTLs for seed shape (Table I; Fig. 6).. Three QTLs (for AS, PL, and L) were detected on chromosome 7, and their nearest markers and directions of additive effects corresponded, suggesting that they are one QTL involved in three seed shape parameters: A decrease in L might result in a decrease in AS and PL. Likewise, two QTLs (for CS and LWR) were detected on chromosome 8, and four QTLs (for PL, CS, L, and LWR) were detected ...
Author(s): Jain, Rashmi; Jenkins, Jerry; Shu, Shengqiang; Chern, Mawsheng; Martin, Joel A; Copetti, Dario; Duong, Phat Q; Pham, Nikki T; Kudrna, David A; Talag, Jayson; Schackwitz, Wendy S; Lipzen, Anna M; Dilworth, David; Bauer, Diane; Grimwood, Jane; Nelson, Catherine R; Xing, Feng; Xie, Weibo; Barry, Kerrie W; Wing, Rod A; Schmutz, Jeremy; Li, Guotian; Ronald, Pamela C | Abstract: BACKGROUND:The availability of thousands of complete rice genome sequences from diverse varieties and accessions has laid the foundation for in-depth exploration of the rice genome. One drawback to these collections is that most of these rice varieties have long life cycles, and/or low transformation efficiencies, which limits their usefulness as model organisms for functional genomics studies. In contrast, the rice variety Kitaake has a rapid life cycle (9 weeks seed to seed) and is easy to transform and propagate. For these reasons, Kitaake has emerged as a model for studies of diverse monocotyledonous species. RESULTS
Rice is grown mostly in tropical and subtropical countries. It is known that UV-B radiation is highest in tropical regions where rice is grown, because the stratospheric ozone layer in high latitudes, and solar angles are higher. The current information on rice is insufficient to conclude the potential risks of UV-B exposure to rice production. UV-B radiation would also have indirect effects on rice production through indirect effects on other components of rice ecosystem such as weeds, diseases and nitrogen-fixing cyanobacteria. Increased UV-B radiation induces a significant reduction in the total biomass in a number of rice cultivars, accompanied by a reduction in tiller number and photosynthetic capacity of plants. The prolonged exposure of UV-B light affects plant height, leaf area, dry weight, net assimilation rate and relative growth rate in some rice cultivars ...
A new study has found that rice-based infant cereals contain higher levels of mercury than cereal from other grains. Consumer Reports parses the findings.
Glycolysis is the process of converting glucose into pyruvate and generating small amounts of ATP (energy) and NADH (reducing power). It is a central pathway that produces important precursor metabolites: six-carbon compounds of glucose-6P and fructose-6P and three-carbon compounds of glycerone-P, glyceraldehyde-3P, glycerate-3P, phosphoenolpyruvate, and pyruvate [MD:M00001]. Acetyl-CoA, another important precursor metabolite, is produced by oxidative decarboxylation of pyruvate [MD:M00307]. When the enzyme genes of this pathway are examined in completely sequenced genomes, the reaction steps of three-carbon compounds from glycerone-P to pyruvate form a conserved core module [MD:M00002], which is found in almost all organisms and which sometimes contains operon structures in bacterial genomes. Gluconeogenesis is a synthesis pathway of glucose from noncarbohydrate precursors. It is essentially a reversal of glycolysis with minor variations of alternative paths [MD:M00003 ...
The present work has as title "Effect of the fertilization nitrogenada in the kidnapping of carbon of the air biomass of the cultivation of rice (Oryza sativa) 1 go down watering to the transplant in the E. E. El Porvenir - INIA - Juan Guerra"; likewise With the objective of quantifying the content of carbon kidnapped in the tour development stages (vegetative and reproductive stage) of the cultivation of rice after the trasplante and to determine the effect of the fertilization nitrogenada in rice, in the kidnapping of carbon; it was carried out the present work, in the Experimental field of the National Program of lnvestigation of Com and Rice of the E. E. The Porvenir which is located in the Km 14,5 South Highway Femando Belaunde Terry", District of Juan Guerra, County and Region of San Martin; with an annual maximum Tº of 27 ºC, precipitation averages yearly of 1 206 mm anda relativa humidity of 79 %. The used design was at random of Complete Blocks (DBCA), with factorial arrangement of ...
Brown rice is the most widely produced rice variety worldwide. Rice millers remove only the outer husks, or "chaff," from each rice grain to produce brown rice. If they process the rice further, removing the underlying nutrient rich "bran," it becomes white rice. Xu noted that many consumers have heard that brown rice is more nutritious than white rice. The reason is that the bran of brown rice contains higher levels of gamma-tocotrienol, one of the vitamin E compounds, and gamma-oryzanol antioxidants, which are lipid-soluble antioxidants. Numerous studies showed that these antioxidants can reduce blood levels of low-density lipoprotein cholesterol (LDL) - so called "bad" cholesterol - and may help fight heart disease. Xu and colleagues analyzed samples of black rice bran from rice grown in the southern United States. In addition, the lipid soluble antioxidants they found in black rice bran possess higher level of anthocyanins antioxidants, which are water-soluble antioxidants. Thus, black rice ...
The study was conducted to investigate genetic variability among 113 aromatic and fine local rice genotypes of which five were exotic in origin. The test genotypes were evaluated for 19 growth traits, yield components, and yield. All the quantitative traits varied significantly among the test genotypes. High heritability along with high genetic advance was observed for flag leaf area, secondary branches per panicle, filled grains per panicle, grain length, grain breadth, grain length breadth ratio, and 1000 grain weight. Such findings suggested preponderance of additive gene action in gene expression for these characters. Grain yield was significantly and positively correlated with days to flowering, days to maturity, panicle length, filled grains per panicle, and 1000 grain weight. According to D2 cluster analysis, 113 test genotypes formed 10 clusters. Selection of parents from the clusters V and X followed by hybridization would possibly result in desirable heterosis for the development of ...
The new MET system will be a systematic and multistage testing scheme for promising breeding lines developed by GRiSP/RICE CRP breeding programs. MET will involve public- and private-sector partners at the key locations. This will allow for products to be channeled quickly into the right target environments and markets, while generating valuable feedback from farmers, millers, consumers, and other stakeholders in the public, private, and NGO sector.. Through INGER, NARES can exchange superior materials among themselves for release directly to farmers. Or they could use these in hybridization. In Africa, INGER will be embedded in the Africa Rice Breeding Task Force. This task force aims to regroup scarce human resources devoted to rice breeding in Africa in order to achieve higher rice productivity through (1) the identification of high performing, agronomically superior varieties that respond to farmers needs and consumers preferences in well-characterized target populations of environments; ...
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The DOST, through the FNRI, is leading research and development on brown rice to determine the various aspects of improving the stability and shelf-life of brown rice. With this, brown rice can be stored at a longer period with no significant changes in nutrient composition and sensory qualities.. Related to this, the FNRI-DOST has successfully determined in 2012 the optimum conditions for extending the shelf-life of brown rice so that it can now be stored from 5-9 months instead of only 1-4 months. But with the S&T solution being offered by the FNRI-DOST, our rice producers may soon be more confident in supplying brown rice in the market knowing it can last longer, compete with other types of rice and cost-efficient to produce ...
Oryza longistaminata (AA genome) is a wild rice species that is phenotypically inferior to cultivated rice but possesses useful alleles that can be used to improve agronomically important traits. Inte
A rice physiological disorder makes mature panicle keep erect with empty grains termed as "straighthead." Straighthead causes yield losses and is a serious threat to rice production worldwide. Here, a new study of association mapping was conducted to identify QTL involved in straighthead. A subset of 380 accessions was selected from the USDA rice core collection and genotyped with 72 genome-wide SSR markers. An optimal model implemented with principle components (PCs) was used in this association mapping. As a result, five markers were identified to be significantly associated with straighthead. Three of them, RM263, RM169, and RM224, were consistent with a previous study. Three markers, RM475, RM263, and RM19, had a resistant allele associated with a decrease in straighthead rating (straighthead rating ≤ 4.8). In contrast, the two other marker loci RM169 and RM224 had a few susceptible alleles associated with an increase in straighthead rating (straighthead rating ≥ 8.7). Interestingly, ...
Some 27 million ha of rainfed rice are frequently affected by drought. Up to 20 million ha may suffer from uncontrolled flooding, ranging from flash floods of relatively short duration to deepwater areas that may be submerged under more than 100 cm of water for a few months. Deepwater rice and floating rice are found in flood-prone environments, where the fields suffer periodically from such excess water. Salinity is widespread in coastal areas. ...
SG#1: "Its worse than dog food.". Brown rice, in this witty interchange, signifies something tasteless and fibrous that the determined showgirl must endure in order to stay whippet-slim and stage-ready. In any case, its supposedly nasty stuff.. And yet there are many varieties of brown rice as well as other types of rice. In the cupboard shot at the top of this page, you can see a jar of Asian black sweet rice on the far left. Now, this is glutinous and probably high-glycemic like regular white rice, but it makes the most wonderful rice pudding with a unique colour (I serve coconut black rice pudding with a lemon cheesecake for a lovely colour contrast). Brown rice (shown on the right hand side of the picture above) comes in a basmati format that can be used just like regular basmati rice. Cook using about a 1:2 ratio of brown rice to liquid. Like most fibrous grains, it will take longer to cook than white rice.. Wild rice is in the centre of the photo above. Its a uniquely Canadian rice that ...