4.7 Article

Genome Size Evolution Mediated by Gypsy Retrotransposons in Brassicaceae

期刊

GENOMICS PROTEOMICS & BIOINFORMATICS
卷 18, 期 3, 页码 321-332

出版社

ELSEVIER
DOI: 10.1016/j.gpb.2018.07.009

关键词

Brassicaceae; Comparative genomics; Gypsy retrotransposon; Copia retrotransposon; Genome size evolution

资金

  1. Innovation Project for the Postdoctoral Researchersin China
  2. Open Research Fund Program of Beijing Key Lab of Plant Resource Research and Development, Beijing Technology and Business University

向作者/读者索取更多资源

The dynamic activity of transposable elements (TEs) contributes to the vast diversity of genome size and architecture among plants. Here, we examined the genomic distribution and transposition activity of long terminal repeat retrotransposons (LTR-RTs) in Arabidopsis thaliana (Ath) and three of its relatives, Arabidopsis lyrata (Aly), Eutrema salsugineum (Esa), and Schrenkiella parvula (Spa), in Brassicaceae. Our analyses revealed the distinct evolutionary dynamics of Gypsy retrotransposons, which reflects the different patterns of genome size changes of the four species over the past million years. The rate of Gypsy transposition in Aly is approximately five times more rapid than that of Ath and Esa, suggesting an expanding Aly genome. Gypsy insertions in Esa are strictly confined to pericentromeric heterochromatin and associated with dramatic centromere expansion. In contrast, Gypsy insertions in Spa have been largely suppressed over the last million years, likely as a result of a combination of an inherent molecular mechanism of preferential DNA removal and purifying selection at Gypsy elements. Additionally, species-specific clades of Gypsy elements shaped the distinct genome architectures of Aly and Esa.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据