Selfing Promotes Spread and Introgression of Segregation Distorters in Hermaphroditic Plants

文献类型： 外文期刊

第一作者： Wang, Hongru

作者： Wang, Hongru;Wang, Hongru;Wang, Hongru;Nielsen, Rasmus;Planche, Leo;Shchur, Vladimir

作者机构：

期刊名称：MOLECULAR BIOLOGY AND EVOLUTION （ 影响因子：11.0； 五年影响因子：14.5 ）

ISSN： 0737-4038

年卷期： 2024 年 41 卷 7 期

页码：

收录情况： SCI

摘要： Segregation distorters (SDs) are genetic elements that distort the Mendelian segregation ratio to favor their own transmission and are able to spread even when they incur fitness costs on organisms carrying them. Depending on the biology of the host organisms and the genetic architecture of the SDs, the population dynamics of SDs can be highly variable. Inbreeding is considered an effective mechanism for inhibiting the spread of SDs in populations, and can evolve as a defense mechanism against SDs in some systems. However, we show that inbreeding in the form of selfing in fact promotes the spread of SDs acting as pollen killers in a toxin-antidote system in hermaphroditic plants by two mechanisms: (i) By reducing the effective recombination rate between killer and antidote loci in the two-locus system and (ii) by increasing the proportion of SD alleles in individual flowers, rather than in the general gene-pool. We also show that in rice (Oryza sativa L.), a typical hermaphroditic plant, all molecularly characterized SDs associated with pollen killing were involved in population hybridization and have introgressed across different species. Paradoxically, these loci, which are associated with hybrid incompatibility and can be thought of as Bateson-Dobzhansky-Muller incompatibility loci are expected to reduce gene-flow between species, in fact cross species boundaries more frequently than random loci, and may act as important drivers of introgression.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序