Sun Yanxia, Zhang Aidi, Zhang Xu, Landis Jacob B, Zhang Huajie, Zhang Xiujun, Sun Hang, Wang Hengchang
CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, China.
Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan, Hubei, China.
iScience. 2023 Feb 8;26(3):106159. doi: 10.1016/j.isci.2023.106159. eCollection 2023 Mar 17.
and are sister species that reproduce sexually and mainly asexually respectively, providing a good system for comparative genome evolution between taxa with different reproductive models. Comparative genome analyses revealed the two species have similar genome size, but encodes many more genes. The gene families specific to show significant enrichment of genes associated with defense response, while those gene families specific to are enriched in genes regulating root system development. Collinearity analyses revealed experienced two rounds of whole-genome duplication. st outlier test across 25 populations uncovered a close inter-relationship between abiotic stress and genetic variability. Genetic feature comparisons showed presents much higher genome heterozygosity, transposable element load, linkage disequilibrium degree, and π/π ratio. This study provides new insights into understanding the genetic differentiation and adaptation within ancient lineages characterized by multiple reproductive models.
[物种名称1]和[物种名称2]是姊妹物种，分别进行有性生殖和主要进行无性生殖，为不同生殖模式的分类群之间的比较基因组进化提供了一个良好的系统。比较基因组分析表明，这两个物种的基因组大小相似，但[物种名称2]编码的基因要多得多。[物种名称2]特有的基因家族显示出与防御反应相关的基因显著富集，而[物种名称1]特有的那些基因家族则在调节根系发育的基因中富集。共线性分析表明[物种名称2]经历了两轮全基因组复制。对25个种群进行的[统计检验名称]异常值检验揭示了非生物胁迫与遗传变异性之间的密切相互关系。遗传特征比较表明，[物种名称2]具有更高的基因组杂合度、转座元件负荷、连锁不平衡程度和π/π比率。这项研究为理解以多种生殖模式为特征的古老谱系中的遗传分化和适应性提供了新的见解。
