Oat chromosome and genome evolution defined by widespread terminal intergenomic translocations in polyploids.

ABSTRACT: Structural chromosome rearrangements involving translocations, fusions and fissions lead to evolutionary variation between species and potentially reproductive isolation and variation in gene expression. While the wheats (Triticeae, Poaceae) and oats (Aveneae) all maintain a basic chromosome number of x=7, genomes of oats show frequent intergenomic translocations, in contrast to wheats where these translocations are relatively rare. We aimed to show genome structural diversity and genome relationships in tetraploid, hexaploid and octoploid Avena species and amphiploids, establishing patterns of intergenomic translocations across different oat taxa using fluorescence in situ hybridization (FISH) with four well-characterized repetitive DNA sequences: pAs120, AF226603, As

SUBMITTER: Tomaszewska P 

PROVIDER: S-EPMC9725029 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature