Extraordinary preservation of gene collinearity over three hundred million years revealed in homosporous lycophytes

文献类型： 外文期刊

第一作者： Li, Cheng

作者： Li, Cheng;Kuo, Li-Yaung;Chen, Xueqing;Nie, Bao;Liao, Xuezhu;Peng, Dan;Han, Xiaoxu;Sun, Shichao;Hou, Zhuangwei;He, Weijun;Li, Fay-Wei;Wickell, David;Li, Fay-Wei;Wickell, David;Li, Fay-Wei;Kuo, Li-Yaung;Jenkins, Jerry;Williams, Mellissa;Plott, Christopher;Grimwood, Jane;Barry, Kerrie;Rajasekar, Shanmugam;Dai, Guanhua;Sun, Cheng;Leebens-Mack, James H.;Wang, Li

作者机构：

关键词： homosporous lycophytes; genome evolution; whole genome duplication; gene collinearity; subgenome dominance

期刊名称：PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA （ 影响因子：11.1； 五年影响因子：12.0 ）

ISSN： 0027-8424

年卷期： 2024 年 121 卷 4 期

页码：

收录情况： SCI

摘要： Homosporous lycophytes (Lycopodiaceae) are a deeply diverged lineage in the plant tree of life, having split from heterosporous lycophytes (Selaginella and Isoetes) similar to 400 Mya. Compared to the heterosporous lineage, Lycopodiaceae has markedly larger genome sizes and remains the last major plant clade for which no chromosome-level assembly has been available. Here, we present chromosomal genome assemblies for two homosporous lycophyte species, the allotetraploid Huperzia asiatica and the diploid Diphasiastrum complanatum. Remarkably, despite that the two species diverged similar to 350 Mya, around 30% of the genes are still in syntenic blocks. Furthermore, both genomes had undergone independent whole genome duplications, and the resulting intragenomic syntenies have likewise been preserved relatively well. Such slow genome evolution over deep time is in stark contrast to heterosporous lycophytes and is correlated with a decelerated rate of nucleotide substitution. Together, the genomes of H. asiatica and D. complanatum not only fill a crucial gap in the plant genomic landscape but also highlight a potentially meaningful genomic contrast between homosporous and heterosporous species.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序