| Disentangling the effects of breakdown of self-incompatibility and transition to selfing in North American Arabidopsis lyrata | |
| Haudry, Annabelle1,2; Zha, Hong Guang2,3; Stift, Marc2,4,5; Mable, Barbara K.2 | |
| 通讯作者 | Haudry, A (reprint author), Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON, Canada, annabelle.haudry@gmail.com |
| 2012-03-01 | |
| 发表期刊 | MOLECULAR ECOLOGY
 |
| ISSN | 0962-1083 |
| 卷号 | 21期号:5页码:1130-1142 |
| 摘要 | A breakdown of self-incompatibility (SI) followed by a shift to selfing is commonly observed in the evolution of flowering plants. Both are expected to reduce the levels of heterozygosity and genetic diversity. However, breakdown of SI should most strongly affect the region of the SI locus (S-locus) because of the relaxation of balancing selection that operates on a functional S-locus, and a potential selective sweep. In contrast, a transition to selfing should affect the whole genome. We set out to disentangle the effects of breakdown of SI and transition to selfing on the level and distribution of genetic diversity in North American populations of Arabidopsis lyrata. Specifically, we compared sequence diversity of loci linked and unlinked to the S-locus for populations ranging from complete selfing to fully outcrossing. Regardless of linkage to the S-locus, heterozygosity and genetic diversity increased with population outcrossing rate. High heterozygosity of self-compatible individuals in outcrossing populations suggests that SI is not the only factor preventing the evolution of self-fertilization in those populations. There was a strong loss of diversity in selfing populations, which was more pronounced at the S-locus. In addition, selfing populations showed an accumulation of derived mutations at the S-locus. Our results provide evidence that beyond the genome-wide consequences of the population bottleneck associated with the shift to selfing, the S-locus of A. lyrata shows a specific signal either reflecting the relaxation of balancing selection or positive selection. |
| 关键词 | Balancing Selection Mating System Evolution Self-incompatibility S-locus |
| 学科领域 | Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology |
| DOI | 10.1111/j.1365-294X.2011.05435.x |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300699500010 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.kib.ac.cn/handle/151853/10471 |
| 专题 | 中国科学院东亚植物多样性与生物地理学重点实验室 |
| 作者单位 | 1.Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON, Canada 2.Univ Glasgow, Inst Biodivers Anim Hlth & Comparat Med, Glasgow, Lanark, Scotland 3.Kunming Inst Bot, Kunming, Peoples R China 4.Ctr Invest Biodiversidade & Recursos Genet CIBIO, Vairao, Portugal 5.Univ Konstanz, Dept Biol, Constance, Germany |
| 推荐引用方式 GB/T 7714 | Haudry, Annabelle,Zha, Hong Guang,Stift, Marc,et al. Disentangling the effects of breakdown of self-incompatibility and transition to selfing in North American Arabidopsis lyrata[J]. MOLECULAR ECOLOGY,2012,21(5):1130-1142. |
| APA | Haudry, Annabelle,Zha, Hong Guang,Stift, Marc,&Mable, Barbara K..(2012).Disentangling the effects of breakdown of self-incompatibility and transition to selfing in North American Arabidopsis lyrata.MOLECULAR ECOLOGY,21(5),1130-1142. |
| MLA | Haudry, Annabelle,et al."Disentangling the effects of breakdown of self-incompatibility and transition to selfing in North American Arabidopsis lyrata".MOLECULAR ECOLOGY 21.5(2012):1130-1142. |
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