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Reproduction, AsexualRanunculusPennisetumAsteraceaeErigeronManihotPotentillaArabisSaxifragaceaePoaAchilleaApomixisOvulePaspalumGametogenesis, PlantRanunculaceaePolyploidyCenchrusTaraxacumSeedsPacific StatesReproductionDiploidyRhododendronChromosomes, PlantParthenogenesisPoaceaePollenHybridization, GeneticBiological EvolutionAngiospermsPloidiesDNA, PlantGene Expression Regulation, PlantGenome, PlantGenes, PlantCytogenetic AnalysisMeiosisCrosses, GeneticGenetic MarkersGenetic VariationModels, GeneticPhylogeny
Difference between apomixisHybridizationVegetative apomixisAsexual reproduction that occursGametophyticFertilizationPollinationFlowering plantsAgamospermySeedsSpeciesPseudogamyMeiosisParthenogenesisPolyploidMitosisPhenomenonApomicticNaturallyFormationUniparentalFernsNorth AmericaReproductionCascadesPlantMalesIdenticalDevelopmentPresenceFamiliesTime
Difference between apomixis5
Hybridization3
  • GP patterns usually have a Pleistocene context because climatic range shifts in temperate to boreal zones offered frequent opportunities for interspecific hybridization, probably giving rise to apomixis in the Northern Hemisphere. (uni-goettingen.de)
  • We suggest that this complex provides a model for understanding other such groups of Crataegus species that are related by whole genome duplications resulting from the fertilization of unreduced gametes (facilitated by but not necessarily dependent on occurrence of gametophytic apomixis), often together with hybridization. (morphobank.org)
  • For plant hybridization to occur and to maintain the genetic diversity of different plant species, this kind of pollination is necessary. (bioenotes.com)
Vegetative apomixis1
  • On the other hand, vegetative apomixis is the replacement of flowers by bulbils. (pediaa.com)
Asexual reproduction that occurs2
  • Apomixis refers to an asexual reproduction that occurs without fertilization and not involving meiosis while polyembryony refers to the formation of more than one embryo from a single fertilized ovum or in a single seed. (pediaa.com)
  • Vegetative reproduction is any type of asexual reproduction that occurs in plants and results in the formation of a new plant from a fragment, part or cutting of the parent plant or specialised reproductive structures known as vegetative propagules. (scoringanswer.com)
Gametophytic1
Fertilization8
  • Many flowering plants with pseudogamous apomixis require fertilization to produce the endosperm of the seed. (wikipedia.org)
  • Furthermore, fertilization does not occur in apomixis while polyembryony undergoes fertilization. (pediaa.com)
  • from the Greek παρθένος parthenos, "virgin", + γένεσις genesis, "creation") is a natural form of asexual reproduction in which growth and development of embryos occur without fertilization. (alchetron.com)
  • Does apomixis require fertilization and pollination? (byjus.com)
  • The methods of reproduction which do not involve meiosis and fertilization are known as apomixis or asexual reproduction . (pw.live)
  • This mechanism can occur in various ways, such as self-fertilization, where pollen fertilizes the ovules within the same flower, or apomixis , where the plant produces seeds without fertilization. (vercel.app)
  • However, apomixis is the term that describes the formation of an embryo without undergoing fertilization, mainly in flowering plants. (pediaa.com)
  • Apomixis asexual seed formation is a phenomenon in which a plant bypasses the most fundamental aspects of sexual reproduction-meiosis and fertilization-to form a viable seed. (pasharazvi.online)
Pollination4
  • Agamospermy can occur through many different mechanisms, some of which require pollination (pseudogamy), and some of which do not (autonomous apomixis). (wikipedia.org)
  • Pollination is a vital process that occurs in plants during their reproduction. (vercel.app)
  • Cross-pollination , on the other hand, occurs when pollen is transferred from the male parts to the female parts of different plants of the same species or of different species. (vercel.app)
  • They are bisexual which cannot open even at maturity and thus self-pollination occurs. (edurev.in)
Flowering plants3
  • Apomixis in flowering plants (angiosperms) includes some types of vegetative reproduction and also agamospermy, which is asexual reproduction through seeds (see apomixis for more information). (wikipedia.org)
  • It occurs widely in ferns and the flowering plants. (pw.live)
  • Polyploidization events, probably connected to key innovations (e.g., vessel elements or the carpel), occurred frequently in the evolutionary history of flowering plants, which are the most species-rich group in the plant kingdom (ca. 370,000 species) and contain 30-70% neopolyploids. (uni-goettingen.de)
Agamospermy3
  • It is sometimes used in a restrictive sense to refer to types of agamospermy in which the endosperm is fertilized but the embryo is not (see Pseudogamous apomixis, below). (wikipedia.org)
  • Furthermore, apomixis is also known as agamospermy , which theoretically occurs in gymnosperms, producing clonal seeds. (pediaa.com)
  • Agamospermy is a kind of plant apomixis in which the embryos and seeds are formed by asexual reproductive methods without involving meiotic gametogenesis and sexual fusion of gametes. (pw.live)
Seeds4
Species8
  • It is particularly common in Rosaceae and Poaceae, where it occurs in many different genera and species. (wikipedia.org)
  • Examples of species with pseudogamous apomixis include the Himalayan blackberry Rubus armeniacus and gamagrass Tripsacum dactyloides. (wikipedia.org)
  • By contrast, autonomous apomixis is the rule among the many apomictic species of Asteraceae including the common dandelion Taraxacum officinale, and also occurs in several genera of Poaceae. (wikipedia.org)
  • Parthenogenesis occurs naturally in many plants, some invertebrate animal species (including nematodes , water fleas, some scorpions , aphids , some mites, some bees , some Phasmida and parasitic wasps) and a few vertebrates (such as some fish , amphibians, reptiles and very rarely birds ). (alchetron.com)
  • In these species asexual reproduction occurs either in summer (aphids) or as long as conditions are favourable. (alchetron.com)
  • While apomixis is relatively rare in animals, it has been observed in some species of reptiles and amphibians. (animallot.com)
  • Prediction Apomixis usually occurs in wild species and the ultimate goal of genetic research in apomixis has been to transfer apomixes to their crop relatives Khan et al. (btfrocks.com)
  • Further, when inferring reproductive isolation on the basis of presence and absence of admixture, we found that the accumulation of reproductive isolation between species does not seem to occur linearly with time since divergence in this system. (biomedcentral.com)
Pseudogamy1
  • About some terms of apomixis: pseudogamy and androgenesis. (wikipedia.org)
Meiosis9
  • Recurrent apomixis is the presence of the same number of chromosomes in the mother plant of the megagametophyte due to incomplete meiosis. (pediaa.com)
  • If meiosis occurs, the offspring will get only a fraction of the mother's alleles. (alchetron.com)
  • Parthenogenesis can occur without meiosis through mitotic oogenesis. (alchetron.com)
  • Apomixis is a complex form of reproduction where offspring are produced from unfertilized eggs without meiosis. (animallot.com)
  • Conclusion] 1) Although there is the phenomenon of apomixis in C. cathayensis , it still follows the law of meiosis of pollen mother cells in most angiosperms. (linyekexue.net)
  • In the following events, indicate the stages where mitosis and meiosis occur (1,2,3). (byjus.com)
  • Apospory refers to the development of 2n gametophytes, without meiosis and spores, from vegetative, or nonreproductive, cells of the sporophyte, while apogamy refers to a type of reproduction, occurring in some ferns, in which the sporophyte develops from the gametophyte without fusion of gametes. (pediaa.com)
  • Meiosis occurs in the male flower parts to produce pollen (represented by the green circle) and the female floral organs produce egg cells (represented by the white circle). (umn.edu)
  • En la partenogénesis se forma un individuo a partir de un ÓVULO no fertilizado que no completó la MEIOSIS. (bvsalud.org)
Parthenogenesis4
Polyploid1
Mitosis1
  • Here, nonrecurrent apomixis is the formation of a haploid embryo from the megaspore mother cell by undergoing mitosis. (pediaa.com)
Phenomenon1
  • However, the enigmatic phenomenon of plant speciation accompanied by polyploidy and apomixis is still poorly understood despite tremendous progress in the field of genomics. (uni-goettingen.de)
Apomictic1
  • Kruschke, with a specimen from southern Washington with the diminished pollen fertility found in allopolyploid, apomictic black-fruited hawthorns occurring east of the Cascades, from northern California north to southernmost Alaska. (morphobank.org)
Naturally2
  • Sharbel's project holds the potential to spur a revolution in crop production, starting with Canola, by applying to plant breeding the findings of 20-plus years of lab research in Germany and Canada to understand naturally occurring asexual seed formation (apomixis) in plants. (usask.ca)
  • Types and mechanisms of seed dormancy, and internal and external factors regulating dormancy are included, as is dormancy breaking occurring naturally and as affected by seed treatments. (cabi.org)
Formation1
Uniparental1
Ferns2
  • Generally, the term 'apogamy' is used to describe the apomixis of plants with an individual gametophyte, especially in ferns. (pediaa.com)
  • Also, these two methods mainly occur in bryophytes and less commonly ferns and lycopods. (pediaa.com)
North America1
  • Douglasianae) occurs in western North America, with a 10-stamen taxon disjunct in the upper Great Lakes basin. (morphobank.org)
Reproduction6
Cascades1
  • It now occurs through much of the Northwest, from British Columbia to northern California west of the Cascades and eastward to Idaho [ 19 , 20 ]. (eopugetsound.org)
Plant2
  • His research group is working with the Institute of Synthetic Biology-at the CEPLAS-Cluster of Excellence on Plant Sciences at the University of Düsseldorf in Germany-and the National Research Council's (NRC) Saskatoon division to develop a "mini chromosome" that would deliver into Canola plants several apomixis-candidate genes they have identified. (usask.ca)
  • Apomixis has been used in plant breeding to produce hybrid varieties and can also be utilised to propagate desired features. (bioenotes.com)
Males1
  • this suggests they reproduced by apomixis, unlike those females which mated with males and had a diverse offspring. (cyberleninka.org)
Identical1
  • The plants produced by apomixis are genetically-identical to the parent while the plants produced by polyembryony are not genetically-identical to the parent. (pediaa.com)
Development1
  • Various changes occur in the walls of endothecium cells during the development of the anther. (vedantu.com)
Presence1
  • Polyploidy, the presence of two or more full genomic complements, repeatedly occurs across the tree of life. (uni-goettingen.de)
Families1
Time1