Genome expansion in three hybrid sunflower species is associated with retrotransposon proliferation

摘要: The origin of new diploid species through inter-specific hybridization may be facilitated by rapid genomic reorganization. There is evidence that this process was involved in the independent origins three annual sunflower genus Helianthus. hybrid taxa, H. anomalus, deserticola and paradoxus, are products ancient events between same two parental annuus petiolaris[1]. have geographically restricted ranges occupy habitats abiotically extreme relative to other Helianthus species;