Characterization of centromeric DNA of Gossypium anomalum reveals sequence-independent enrichment dynamics of centromeric repeats
文献类型： 外文期刊
作者： Ding, Wenjie 1 ; Zhu, Yuanbin 1 ; Han, Jinlei 1 ; Zhang, Hui 1 ; Xu, Zhenzhen 3 ; Khurshid, Haris 4 ; Liu, Fang 5 ; Hasterok, Robert 6 ; Shen, Xinlian 3 ; Wang, Kai 1 ;
作者机构： 1.Nantong Univ, Sch Life Sci, Nantong 226019, Peoples R China
2.Fujian Agr & Forestry Univ, Coll Agr, Fuzhou 350002, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Ind Crops, Key Lab Cotton & Rapeseed Nanjing, Minist Agr & Rural Affairs, Nanjing 210014, Peoples R China
4.Natl Agr Res Ctr, Oilseeds Res Program, Islamabad 44500, Pakistan
5.Chinese Acad Agr Sci, Inst Cotton Res, State Key Lab Cotton Biol, Anyang 455000, Peoples R China
6.Univ Silesiaia Katowice, Inst Biol Biotechnol & Environm Protect, Fac Nat Sci, Plant Cytogenet & Mol Biol Grp, PL-40032 Katowice, Poland
关键词： Centromere; Centromeric retrotransposon; Adaptive evolution; Chromatin immunoprecipitation; Gossypium anomalum; CENH3
期刊名称：CHROMOSOME RESEARCH （ 影响因子：2.6； 五年影响因子：3.6 ）
ISSN： 0967-3849
年卷期： 2023 年 31 卷 2 期
页码：
收录情况： SCI
摘要： Centromeres in eukaryotes are composed of highly repetitive DNAs, which evolve rapidly and are thought to achieve a favorable structure in mature centromeres. However, how the centromeric repeat evolves into an adaptive structure is largely unknown. We characterized the centromeric sequences of Gossypium anomalum through chromatin immunoprecipitation against CENH3 antibodies. We revealed that the G. anomalum centromeres contained only retrotransposon-like repeats but were depleted in long arrays of satellites. These retrotransposon-like centromeric repeats were present in the African-Asian and Australian lineage species, suggesting that they might have arisen in the common ancestor of these diploid species. Intriguingly, we observed a substantial increase and decrease in copy numbers among African-Asian and Australian lineages, respectively, for the retrotransposon-derived centromeric repeats without apparent structure or sequence variation in cotton. This result indicates that the sequence content is not a decisive aspect of the adaptive evolution of centromeric repeats or at least retrotransposon-like centromeric repeats. In addition, two active genes with potential roles in gametogenesis or flowering were identified in CENH3 nucleosome-binding regions. Our results provide new insights into the constitution of centromeric repetitive DNA and the adaptive evolution of centromeric repeats in plants.
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