- Apomictic polyploid complexes usually comprise a few sexual progenitor species, and numerous apomictic hybrid derivatives. (uni-goettingen.de)
- Polyploid individuals may still be able to carry out sexual reproduction and therefore produce sexual offspring, allowing for the formation of new polyploid hybrids. (wikipedia.org)
- Like other apomictic species in Cichorieae, polyploid apomicts may still produce viable pollen that can be transferred to sexual diploids through the normal process of pollination. (wikipedia.org)
- The mixed apomict-sexual parantage may produce a polyploid hybrid (as has been observed when the apomictic C. barbigera breeds with diploid species C. atribarba). (wikipedia.org)
- Antennaria neglecta is a sexual progenitor of both the A. howellii and A. parvifolia polyploid complexes and has one of the more widespread ranges among the amphimictic species in the genus in North America. (ngpherbaria.org)
- variously sexual or apomictic, diploid or polyploid. (ngpherbaria.org)
- Poa is taxonomically difficult because most species are polyploid, many are apomictic, and hybridization is common. (openherbarium.org)
- To overcome this solely descriptive and impracticable classification of ill-founded entities, the project aiming at a classification concept based on evolutionary concepts that are better comparable to sexual plant species. (uni-goettingen.de)
- Although apomixis has been considered a "blind alley of evolution", research into apomictic species and species complexes has cast doubt on this. (wikipedia.org)
- The species is hermaphrodite (has both male and female organs) and is pollinated by Insects, Apomictic (reproduce by seeds formed without sexual fusion). (pfaf.org)
- Apomictic Hieracium subgenus Pilosella species mitotically form female gametes, with the seed's embryo and endosperm developing autonomously (without fertilisation). (botany.one)
- Closely related to the model plant Arabidopsis thaliana, the genus Boechera is known to contain both sexual and apomictic species or accessions. (escholarship.org)
- Boechera retrofracta is a diploid sexually reproducing species and is thought to be an ancestral parent species of apomictic species. (escholarship.org)
- An assembled genome of B. retrofracta will help in the challenging assembly of the highly heterozygous genomes of hybrid apomictic species. (escholarship.org)
- The taxa traditionally treated as Arabis ( Boechera ) lemmonii vars. depauperata, drepanoloba , and paddoensis are apomictic hybrids here recognized as distinct species (see M. D. Windham and I. A. Al-Shehbaz 2007 for detailed comparison). (intermountainbiota.org)
- Limonium species present a polymorphic sexual system associated to flower polymorphisms such as ancillary pollen and stigma and/or heterostyly, under sporophytic control that prevents self and intramorph mating. (ibcmadrid2024.com)
- Most sexual and apomict species are self-incompatible, the first usually form meiotically reduced embryo sacs and viable pollen. (ibcmadrid2024.com)
- To explore the mechanisms beyond these reproduction modes, ovule transcriptome profiling of sexual and apomict species was carried out. (ibcmadrid2024.com)
- species apomictic or sexual. (unc.edu)
- The sexual diploid species are relatively distinct from one another, but they hybridize wherever they come into contact. (asu.edu)
- Thus, for any pair of sexual diploid species (e.g. (asu.edu)
- In D. julaodongensis, both 8-SMC and 16-SMC and both 32-spore and 64-spore spo- rangia respectively were observed in the same individual plant, which suggests that it may be a facultative (Dopp-Manton type apomictic and normal sexual) diploid species. (jipb.net)
- It seems that this species is a facultative (both sexual and apomictic). (jipb.net)
- A species ( pl. species) is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring , typically by sexual reproduction . (atozwiki.com)
- [4] Wilkins further grouped the species concepts into seven basic kinds of concepts: (1) agamospecies for asexual organisms (2) biospecies for reproductively isolated sexual organisms (3) ecospecies based on ecological niches (4) evolutionary species based on lineage (5) genetic species based on gene pool (6) morphospecies based on form or phenotype and (7) taxonomic species, a species as determined by a taxonomist. (atozwiki.com)
- Niche dynamics of alien species do not differ among sexual and apomictic flowering plants. (ropensci.org)
- A variety of sexual reproductive systems are represented within the genus, but individual species are usually uniform in this regard. (openherbarium.org)
- AU - Rosengren,Frida, AU - Cronberg,Nils, PY - 2015/7/3/entrez PY - 2015/7/3/pubmed PY - 2016/6/16/medline KW - bryophytes KW - dwarf males KW - germination KW - sexual reproduction KW - spore KW - sporophytes JF - Biology letters JO - Biol Lett VL - 11 IS - 7 N2 - Spores from three bryophyte species with dwarf males (Homalothecium lutescens, Homalothecium sericeum and Isothecium alopecuroides) were sown on shoots of H. lutescens in vitro. (unboundmedicine.com)
- This allows apomictic populations to expand into new geographic areas more rapidly than sexual ones. (wikipedia.org)
- Hughes J, Richards AJ (1988) The genetic structure of populations of sexual and asexual Taraxacum (dandelions). (springer.com)
- sexual and apomictic populations present. (unc.edu)
- L'objectif de ce projet était de mettre en culture 24 populations d'origines sauvages (prospectées en France métropolitaine) et de les comparer à deux variétés commerciales témoins 'Arbo' et 'Arnimed', sur 4 sites d'expérimentation aux contextes pédoclimatiques variés mais a priori adaptés à la culture de l'espèce. (cbnpmp.fr)
- Une forte mortalité globale a pu être constatée sur l'ensemble des populations sauvages étudiées sans que les causes aient pu en être identifiées. (cbnpmp.fr)
- Most of the hybrid derivatives in Boechera are triploids, but apomictic diploids are known as well. (asu.edu)
- Fortunately, a strong correlation between pollen morphology and ploidy level/reproductive mode facilitates the separation of sexual diploids from polyploids and apomicts in Boechera . (asu.edu)
- Here we examined molecular evolution, gene regulation and chromosomal location of a male apomeiosis factor (UPG2), a long-noncoding RNA gene, in sexual and apomictic Boechera with and without male apomeiosis (i.e. balanced and unbalanced apomicts). (plantcytogenomics.org)
- We found allele classes specific to apomictic and sexual Boechera accessions and a third class that shares features of both and point to a convergent transition state. (plantcytogenomics.org)
- Plants of B. gracilenta are scattered across the Colorado Plateau (northeast of the range of B. perennans ) and are apomictic triploids, apparently produced by hybridization between B. fendleri and B. pallidifolia . (swbiodiversity.org)
- A partial receptor like kinase gene ( CcRLK ) was isolated from apomictic C . ciliaris which showed exclusive expression in the embryo sacs of apomictic flowers compared to sexual embryo sacs during in situ hybridization analysis. (uky.edu)
- In Spain we are carrying a triploid breeding program since 1996 based on 2 x × 2 x , 2 x × 4 x and 4 x × 2 x sexual hybridizations followed by embryo rescue and flow cytometry, together with the use of different approaches to produce new tetraploid parents. (ishs.org)
- More than thirty spontaneous autotetraploid apomictic genotypes to be used as male parents have been selected from seedbeds by flow cytometry. (ishs.org)
- Comparison of gene expression during sexual and apomictic development in buffelgrass represents a new model system and a strategy for investigating female reproductive development in the angiosperms. (tamu.edu)
- As a result of this reproductive interference, sexual reproduction between diploid plants is reduced when apomicts enter a population. (wikipedia.org)
- Tanganyika INTA (Ti) subjected to water stress and control plants showed an average of 14% or 2% sexual embryo sacs, indicating an increment of sexuality under stress. (conicet.gov.ar)
- After a rehydration period these plants showed an average of sexuality rate of 5.3 %, indicating a significant reduction in the number of sexual embryo sacs, being, however, significantly different from control plants. (conicet.gov.ar)
- Tanganyika USDA(Tu) did not show at any time the ability to generate sexual embryo sacs and were classified as full apomictic. (conicet.gov.ar)
- 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)
- Together with the 10-stamen, black-fruited hawthorns in predominantly tetraploid, apomictic, and self-fertile C. douglasii Lindl. (morphobank.org)
- Also nine autotetraploid non apomictic genotypes, mainly to be used as female parents, have been obtained by chromosome duplication with treatments of micrografted shoot tips with colchicine or oryzalin. (ishs.org)
- AA and BB), this process can yield different intermediates, including AB apomicts and both possible apomictic triploids (AAB and ABB). (asu.edu)
- Sex alleles are found only in some of the sexual accessions, have higher nucleotide divergence and lower transcriptional activity compared to apo alleles. (plantcytogenomics.org)
- Mechanisms enabling the maintenance of sexual and apomictic modes of seed formation in sympatry are poorly understood. (botany.one)
- NCERT Solutions, Question Answer and Mind Map for Class 12 Biology Chapter 2, "Sexual Reproduction In Flowering Plants," is a comprehensive study material package designed to help students understand the mechanisms of sexual reproduction in plants. (modeducation.com)
- however, rare sexual plants have been recovered. (tamu.edu)
- Uniform and variable patterns were observed in progenies of apomictic and sexual plants, respectively. (techscience.com)
- All flowering plants show sexual reproduction and look at the diversity of structures of the inflorescences, flowers and floral parts, shows an amazing range of adaptations to ensure formation of end products of sexual reproduction, the fruits and seeds. (edignite.com)
- Let us understand the morphology, structure and the process of sexual reproduction in flowering plants. (edignite.com)
- Overall, the NCERT Solutions, Question Answer, and Mind Map for Class 12 Biology Chapter 2 provide a comprehensive understanding of sexual reproduction in flowering plants and equip students with the knowledge and skills needed to answer questions related to the topic. (modeducation.com)
- Comparative gene expression in sexual and apomictic ovaries of Pennisetum ciliare (L.) Link. (tamu.edu)
- A modified differential display procedure was used to compare gene expression in unpollinated ovaries containing ovules with either sexual or apomictic female gametophytes. (tamu.edu)
- Komodo dragons are sexual organisms that can also reproduce parthenogenetically. (worldatlas.com)
- In a genus characterized by the presence of polyploids and apomicts, it is essential to know which taxa represent the products of primary, divergent evolution (i.e., sexual diploids) and which are the result of secondary, reticulate evolution. (asu.edu)
- In apomictic lineages the lack of recombination and cross-fertilization can eventually result in numerous clonal hybrid lineages, which can fix certain morphological and ecological traits. (uni-goettingen.de)
- By not including the hybrid poly-ploid within the circumscription of a single one of its sexual progenitors, the circumscription here better portrays the evolutionary relationships between A. parlinii and its sexual progenitors. (vplants.org)
- Sexual reproduction is the process by which new organisms are formed from the fusion of male and female gametes from two parents. (modeducation.com)
- Ru Y, Mandáková TM, Lysak MA, Koch MA (2022) The evolutionary history of Cardamine bulbifera shows a successful rapid postglacial Eurasian range expansion in the absence of sexual reproduction. (uni-heidelberg.de)
- Typically, B. perennans is a sexual diploid largely restricted to the warm deserts of Arizona, California, Nevada, and southern New Mexico. (swbiodiversity.org)
- Based on northern analysis, one cDNA was detected in only the sexual ovaries, two cDNAs in only apomictic ovaries and one cDNA was present in both types of ovaries. (tamu.edu)
- Under these circumstances, even the most distinctive sexual diploid progenitors can become lost in a seemingly continuous range of morphological variability. (asu.edu)
- Apomictic clades elsewhere in Cichorieae have demonstrated an ability to "revert" to a sexual mode of reproduction, reducing the risk of extinction through lack of introgression. (wikipedia.org)