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
2012-03-01
发表期刊MOLECULAR ECOLOGY
ISSN0962-1083
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
资助信息Biotechnology and Biological Sciences Research Council[ISIS 2078]; BBSRC/European Research Association Plant Genomics[BB/L024734/1]; Natural Environment Research Council[NE/D013461/1]; Portuguese Fundacao de Ciencia e a Tecnologia; European Union[SFRH/BPD/64400/2009]
学科领域Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
DOI10.1111/j.1365-294X.2011.05435.x
收录类别SCI
语种英语
WOS研究方向Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
WOS记录号WOS:000300699500010
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
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
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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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