Extensive chromosomal variation in a recently formed natural allopolyploid species, Tragopogon miscellus (Asteraceae)
نویسندگان
چکیده
منابع مشابه
Extensive chromosomal variation in a recently formed natural allopolyploid species, Tragopogon miscellus (Asteraceae).
Polyploidy, or whole genome duplication, has played a major role in the evolution of many eukaryotic lineages. Although the prevalence of polyploidy in plants is well documented, the molecular and cytological consequences are understood largely from newly formed polyploids (neopolyploids) that have been grown experimentally. Classical cytological and molecular cytogenetic studies both have show...
متن کاملEvolution and expression of homeologous loci in Tragopogon miscellus (Asteraceae), a recent and reciprocally formed allopolyploid.
On both recent and ancient time scales, polyploidy (genome doubling) has been a significant evolutionary force in plants. Here, we examined multiple individuals from reciprocally formed populations of Tragopogon miscellus, an allotetraploid that formed repeatedly within the last 80 years from the diploids T. dubius and T. pratensis. Using cDNA-AFLPs followed by genomic and cDNA cleaved amplifie...
متن کاملRapid Chromosome Evolution in Recently Formed Polyploids in Tragopogon (Asteraceae)
BACKGROUND Polyploidy, frequently termed "whole genome duplication", is a major force in the evolution of many eukaryotes. Indeed, most angiosperm species have undergone at least one round of polyploidy in their evolutionary history. Despite enormous progress in our understanding of many aspects of polyploidy, we essentially have no information about the role of chromosome divergence in the est...
متن کاملCytonuclear Coordination Is Not Immediate upon Allopolyploid Formation in Tragopogon miscellus (Asteraceae) Allopolyploids
Allopolyploids, formed by hybridization and chromosome doubling, face the immediate challenge of having duplicated nuclear genomes that interact with the haploid and maternally inherited cytoplasmic (plastid and mitochondrial) genomes. Most of our knowledge of the genomic consequences of allopolyploidy has focused on the fate of the duplicated nuclear genes without regard to their potential int...
متن کاملCharacterization of duplicate gene evolution in the recent natural allopolyploid Tragopogon miscellus by next-generation sequencing and Sequenom iPLEX MassARRAY genotyping.
Tragopogon miscellus (Asteraceae) is an evolutionary model for the study of natural allopolyploidy, but until now has been under-resourced as a genetic model. Using 454 and Illumina expressed sequence tag sequencing of the parental diploid species of T. miscellus, we identified 7782 single nucleotide polymorphisms that differ between the two progenitor genomes present in this allotetraploid. Va...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2012
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1112041109