Abstract
Avena sterilis, the ancestral species of cultivated oats, is a valuable genetic resource for oat improvement. Here we generated a near-complete 10.99 Gb A. sterilis genome and a high-quality 10.89 Gb cultivated oat genome. Genome evolution analysis revealed the centromeres dynamic and structural variations landscape associated with domestication between wild and cultivated oats. Population genetic analysis of 117 wild and cultivated oat accessions worldwide detected many candidate genes associated with important agronomic traits for oat domestication and improvement. Remarkably, a large fragment duplication from chromosomes 4A to 4D harbouring many agronomically important genes was detected during oat domestication and was fixed in almost all cultivated oats from around the world. The genes in the duplication region from 4A showed significantly higher expression levels and lower methylation levels than the orthologous genes located on 4D in A. sterilis. This study provides valuable resources for evolutionary and functional genomics and genetic improvement of oat.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call