Outlier loci highlight the direction of introgression in oaks
文献类型：期刊论文
| 作者 | Guichoux, E ; Garnier-Gere, P ; Lagache, L ; Lang, T ; Boury, C ; Petit, RJ |
| 刊名 | MOLECULAR ECOLOGY
 |
| 出版日期 | 2013 |
| 卷号 | 22期号:2页码:450-462 |
| 关键词 | asymmetric introgression divergent selection gene flow barriers genetic assignment outlier loci Quercus petraea Quercus robur single nucleotide polymorphism |
| 中文摘要 | Loci considered to be under selection are generally avoided in attempts to infer past demographic processes as they do not fit neutral model assumptions. However, opportunities to better reconstruct some aspects of past demography might thus be missed. Here we examined genetic differentiation between two sympatric European oak species with contrasting ecological dynamics (Quercus robur and Quercus petraea) with both outlier (i.e. loci possibly affected by divergent selection between species or by hitchhiking effects with genomic regions under selection) and nonoutlier loci. We sampled 855 individuals in six mixed forests in France and genotyped them with a set of 262 SNPs enriched with markers showing high interspecific differentiation, resulting in accurate species delimitation. We identified between 13 and 74 interspecific outlier loci, depending on the coalescent simulation models and parameters used. Greater genetic diversity was predicted in Q.petraea (a late-successional species) than in Q.robur (an early successional species) as introgression should theoretically occur predominantly from the resident species to the invading species. Remarkably, this prediction was verified with outlier loci but not with nonoutlier loci. We suggest that the lower effective interspecific gene flow at loci showing high interspecific divergence has better preserved the signal of past asymmetric introgression towards Q.petraea caused by the species' contrasting dynamics. Using markers under selection to reconstruct past demographic processes could therefore have broader potential than generally recognized. |
| 公开日期 | 2013-02-16 |
| 源URL | [http://ir.xtbg.org.cn/handle/353005/3890]  |
| 专题 | 西双版纳热带植物园_生态进化组 |
| 推荐引用方式 GB/T 7714 | Guichoux, E,Garnier-Gere, P,Lagache, L,et al. Outlier loci highlight the direction of introgression in oaks[J]. MOLECULAR ECOLOGY,2013,22(2):450-462. |
| APA | Guichoux, E,Garnier-Gere, P,Lagache, L,Lang, T,Boury, C,&Petit, RJ.(2013).Outlier loci highlight the direction of introgression in oaks.MOLECULAR ECOLOGY,22(2),450-462. |
| MLA | Guichoux, E,et al."Outlier loci highlight the direction of introgression in oaks".MOLECULAR ECOLOGY 22.2(2013):450-462. |
入库方式： OAI收割
来源：西双版纳热带植物园
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