A recent burst of gene duplications in Triticeae

• DOI: 10.1016/j.xplc.2021.100268
• Publication Date: 2021-12-11T07:18:21Z
• Authors: Xiaoliang Wang; Xueqing Yan; Yiheng Hu; Liuyu Qin; Daowen Wang; Jizeng Jia; Yuannian Jiao
• Keywords: Triticeae; Aegilops tauschii; Gene dosage; Concerted evolution

Gene duplication provides raw genetic materials for evolution and potentially novel genes crop improvement. The two seminal genomic studies of Aegilops tauschii both mentioned the large number independently duplicated in recent years, but mechanism evolutionary significance these gene duplicates have not yet been investigated. Here, we found that a burst duplications (hereafter abbreviated as RBGD) has probably occurred all sequenced Triticeae species. Further investigations characteristics their flanking sequences suggested transposable element (TE) activity may involved generating RBGD. We also characterized timing, retention pattern, diversification, expression following Triticeae. Multiple subgenome-specific comparisons pairs clearly supported extensive differential regulation related functional diversity among such three subgenomes bread wheat. Moreover, several from RBGD evolved into key factors influence important agronomic traits Our results provide insights unique source species, which increased dosage together with polyploidization events history