• The allopolyploid species Arabidopsis kamchatica is a natural hybrid of the zinc hyperaccumulator A. halleri and of the nonaccumulator A. lyrata. (uzh.ch)
  • However, in other allopolyploids such as Arabidopsis suecica , Upland cotton ( Gossypium hirsutum ) or Pima cotton ( G. barbadense ) 3 , the genomes coexist relatively stable, although changes can occur at levels of gene expression and epigenetic modifications. (nature.com)
  • 2018). Patterns of polymorphism and selection in the subgenomes of the allopolyploid Arabidopsis kamchatica. (uzh.ch)
  • Concerted genomic and epigenomic changes accompany stabilization of Arabidopsis allopolyploids. (zeagenomics.org)
  • Different genomes in a new allopolyploid often lead to "genome shock", a term coined by Barbara McClintock 1 , which may result in different consequences 2 . (nature.com)
  • Moreover, okra genome is allopolyploid in nature and possess a large number of chromosomes (2n = 56-196) which makes it more complicated. (intechopen.com)
  • Genome balance and dosage effect drive allopolyploid formation in Brassica . (bvsalud.org)
  • Much of the success of the D. majalis polyploids can be attributed to genomic and epigenetic modifications that have taken place at their origins, which demonstrates the importance of the combined genome of an allopolyploid as a special arena for evolutionary change and to the birth of new successful lineages. (lu.se)
  • Spatio-temporal expression dynamics differ between homologues of flowering time genes in the allopolyploid Brassica napus. (jic.ac.uk)
  • In some allopolyploids such as oilseed rape (or canola, Brassica napus ) and Tragopogon miscellus , they show rapid genomic reshuffling, producing aneuploids and exchanges between homoeologous chromosomes. (nature.com)
  • Studies in resynthesized Brassica napus allopolyploids indicate that homoeologous chromosome exchanges in advanced generations (S5:6) alter gene expression through the loss and doubling of homoeologous genes within the rearrangements. (purdue.edu)
  • A. kamchatica has on average half the expression of these genes compared with A. halleri due to fixed heterozygosity inherent in allopolyploids. (uzh.ch)
  • The conserved genomic synteny between allotetraploids and related species may suggest a role for epigenetic modifications in nonadditive gene expression as observed in resynthesized and natural allopolyploids. (nature.com)
  • Differential gene expression between the progenitors and additive (midparent) expression in the allopolyploids were tested. (purdue.edu)
  • Variation in antiherbivore defense responses in synthetic Nicotiana allopolyploids correlates with changes in uniparental patterns of gene expression. (mpg.de)
  • We hypothesize that highly expressed variants with distinct IGS features may induce heritable epigenetic reprogramming of the partner rDNA arrays, harmonizing the expression of thousands of genes in allopolyploids. (muni.cz)
  • Individual allopolyploids showed nonadditive expression for 1.6-32% of all genes. (purdue.edu)
  • These divergent rRNA genes could be the result of a whole ribosomal cluster duplication or of an allopolyploid event during a crisis period, since, the fossil are lacking posterioly to the post-Carboniferous period ( c.a ., 300 million years). (scialert.net)
  • The intragenomic 28S rDNA variability may be due to a hybridization event which can join different alleles from the two diploid (or polyploid) parental taxa to an allopolyploid descendant. (springer.com)
  • I also review evidence indicating that the properties and evolutionary potential of allopolyploids and diploid hybrid derivatives may be influenced by cytoplasmic factors. (bioone.org)
  • 1990), and the occurrence of sterile backcross triploids with its diploid progenitors in zones of sympatry has blurred the already subtle features distinguishing this allopolyploid. (efloras.org)
  • In plants, hybridization between species can instantaneously generate allopolyploid species through fusing unreduced gametes or forming interspecific hybrids followed by chromosome doubling. (nature.com)
  • There were signs of genetic admixture between mints, including allopolyploids, indicating that the reproductive barriers between Mentha species with differences in ploidy are likely incomplete. (lu.se)
  • Evidence for an allopolyploid complex in New Zealand Polystichum (Dryopteridaceae). (wikimedia.org)
  • The genetics of chromosome pairing and meiotic recombination is complicated by the allopolyploid nature of many crops, a widespread feature in the plant kingdom 3 . (nature.com)
  • Generally, interpopulation crosses may generate epialleles that are not present in natural popula- tions, underlying epigenetic dynamics in young allopolyploids. (muni.cz)
  • 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)
  • We use several phylogenetic and population genomics approaches to clarify the origins of the genomes of three of these allopolyploid species using single nucleotide polymorphism data and a guided transcriptome assembly. (peerj.com)
  • From a genetic perspective, allopolyploids are characterized by diploid-like meiotic behavior and limited interaction between the two homoeologous genomes. (peerj.com)
  • It is necessary to discriminate donor genomes when studying cytogenetic stability in distant crosses to identify homologous chromosome pairing, and microsatellite repeats have been used to discriminate subgenomes in allopolyploids. (nih.gov)
  • The identification of homeologous genomes and the biogeographical analyses of highly reticulate allopolyploid-rich groups face the challenge of incorrectly inferring the genomic origins and the biogeographical patterns of the polyploids from unreliable strictly bifurcating trees. (unizar.es)
  • Here we reconstruct a plausible evolutionary scenario of the diverging and merging genomes inherited by the diploid and allopolyploid species and cytotypes of the model grass genus Brachypodium. (unizar.es)
  • We have identified the ancestral Brachypodium genomes and inferred the paleogeographical ranges for potential hybridization events that originated its allopolyploid taxa. (unizar.es)
  • Our combined Minimum Evolution-coalescence-Bayesian approach allowed us to infer the origins and the identities of the homeologous genomes of the Brachypodium allopolyploids, matching the expected ploidy levels of the hybrids. (unizar.es)
  • Putative ancestral homeologous genome have been inherited by B. mexicanum, ancestral and recent genomes by B. boissieri, and only recently evolved genomes by B. retusum and the core perennial clade allopolyploids (B. phoenicoides, B. pinnatum 4x, B. rupestre 4x). (unizar.es)
  • A reliable biogeographical scenario was obtained for the Brachypodium genomes and allopolyploids where homeologous genomes split from their respective diploid counterpart lineages in the same ancestral areas, showing similar or distinct dispersals. (unizar.es)
  • tauschii D genomes, and others present in the allopolyploids may also contain useful variation as a result of adaptation to an allopolyploid, multi-genome environment. (unboundmedicine.com)
  • This reorganization was reproducible in both synthetic allopolyploids and natural wheat allopolyploids with a similar genomic constitution. (biomedcentral.com)
  • For the first time, we compared phenotypic traits on a large scale in Tragopogon diploids, natural allopolyploids, and three generations of synthetic allopolyploids. (jax.org)
  • By contrast, the allopolyploid taxa remained in the same ancestral ranges after hybridization and genome doubling events. (unizar.es)
  • However, the possibility of such bursts has been studied primarily in allopolyploids, where the effects of WGD and hybridization are confounded (e.g. refs. (nature.com)
  • Using synthetic allopolyploid Triticum x Aegilops , it was found that reorganization of 5S rDNA occurred soon after the formation of allopolyploids [ 20 , 21 ]. (biomedcentral.com)
  • Compared to allopolyploid speciation, there are fewer cases of homoploid hybrid speciation in plants. (phys.org)
  • Phenotypic trait variation in the North American Tragopogon allopolyploid complex. (jax.org)
  • Allopolyploid hybrids did not show transgression in any physiological parameter that may have allowed them to coexist regionally with their parents. (datadryad.org)
  • Isozyme analyses revealed fixed heterozygosity in A. liliago, which indicates an allopolyploid origin. (lu.se)
  • Our approach should have utility in deciphering the genomic composition and the historical biogeography of other allopolyploid-rich organismal groups, which are predominant in eukaryotes. (unizar.es)
  • Furthermore, using a gene-tree reconciliation approach, we established the autopolyploid origin of the entire Alchemilla s.l. and the nested allopolyploid origin of four major clades within the group. (uib.no)
  • One of the repetitive sequences labeled half of the chromosome set almost homogenously supporting an allopolyploid status of G. hispidula and its close relative G. subglabra (1,622 Mbp, 2n = 40). (muni.cz)
  • It is an allopolyploid derived from the hybrid between S. spathulatum ( x = 8) and S. falcatum ( x = 5). (efloras.org)
  • Resynthesized and natural allopolyploid lines generally showed minor to nonexistent trait differences. (jax.org)