Identification of positive selection signatures in pigs by comparing linkage disequilibrium variances

文献类型： 外文期刊

第一作者： Li, X.

作者： Li, X.;Fan, B.;Liu, B.;Li, X.;Liu, B.;Li, X.;Wang, Z.;Yang, S.;Dong, K.;Tang, Z.;Li, K.

作者机构：

关键词： ADAMTSL3;body length;population structure;single nucleotide polymorphisms;VarLD

期刊名称：ANIMAL GENETICS （ 影响因子：3.169； 五年影响因子：3.058 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Selection affects the patterns of linkage disequilibrium (LD) around the site of a beneficial allele with an increase in LD among the hitchhiking alleles. Comparing the differences in regional LD between pig populations could help to identify putative genomic regions with potential adaptations for economic traits. In this study, using Illumina Porcine SNP60K BeadChip genotyping data from 207 Chinese indigenous, 117 South American village and 408 Large White pigs, we estimated the variation of genome-wide LD between populations using the VARLD program. The top 0.1% standardized VarLD scores were used as a criterion for all comparisons, and compared with LD blocks, a total of four selection signatures on Sus scrofa chromosome (SSC) 7, 9, 13 and 14 were identified in all populations. These signatures overlapped with quantitative trait loci for linoleic acid content, age at puberty, number of muscle fibers per unit area, hip structure and body weight traits in pigs. Among them, one of the signatures (56.5-56.6 Mb on SSC7) in Large White pigs harbored the ADAMTSL3 gene, which is known to affect body length. The findings of this study seem to point toward recent selection in different pig populations. Further investigations are encouraged to confirm the selection signatures detected by VARLD in the present study.

分类号： Q953

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