Dataset Information

Whole-genome resequencing analyses of five pig breeds, including Korean wild and native, and three European origin breeds.

ABSTRACT: Pigs have been one of the most important sources of meat for humans, and their productivity has been substantially improved by recent strong selection. Here, we present whole-genome resequencing analyses of 55 pigs of five breeds representing Korean native pigs, wild boar and three European origin breeds. 1,673.1 Gb of sequence reads were mapped to the Swine reference assembly, covering ?99.2% of the reference genome, at an average of ?11.7-fold coverage. We detected 20,123,573 single-nucleotide polymorphisms (SNPs), of which 25.5% were novel. We extracted 35,458 of non-synonymous SNPs in 9,904 genes, which may contribute to traits of interest. The whole SNP sets were further used to access the population structures of the breeds, using multiple methodologies, including phylogenetic, similarity matrix, and population structure analysis. They showed clear population clusters with respect to each breed. Furthermore, we scanned the whole genomes to identify signatures of selection throughout the genome. The result revealed several promising loci that might underlie economically important traits in pigs, such as the CLDN1 and TWIST1 genes. These discoveries provide useful genomic information for further study of the discrete genetic mechanisms associated with economically important traits in pigs.

SUBMITTER: Choi JW

PROVIDER: S-EPMC4535618 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature

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Whole-genome resequencing analyses of five pig breeds, including Korean wild and native, and three European origin breeds.

Choi Jung-Woo JW Chung Won-Hyong WH Lee Kyung-Tai KT Cho Eun-Seok ES Lee Si-Woo SW Choi Bong-Hwan BH Lee Sang-Heon SH Lim Wonjun W Lim Dajeong D Lee Yun-Gyeong YG Hong Joon-Ki JK Kim Doo-Wan DW Jeon Hyeon-Jeong HJ Kim Jiwoong J Kim Namshin N Kim Tae-Hun TH

DNA research : an international journal for rapid publication of reports on genes and genomes 20150627 4

Pigs have been one of the most important sources of meat for humans, and their productivity has been substantially improved by recent strong selection. Here, we present whole-genome resequencing analyses of 55 pigs of five breeds representing Korean native pigs, wild boar and three European origin breeds. 1,673.1 Gb of sequence reads were mapped to the Swine reference assembly, covering ∼99.2% of the reference genome, at an average of ∼11.7-fold coverage. We detected 20,123,573 single-nucleotide ...[more]

PMID: 26117497

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Project description:BackgroundNative pig breeds in the Iberian Peninsula are broadly classified as belonging to either the Celtic or the Mediterranean breed groups, but there are other local populations that do not fit into any of these groups. Most of the native pig breeds in Iberia are in danger of extinction, and the assessment of their genetic diversity and population structure, relationships and possible admixture between breeds, and the appraisal of conservation alternatives are crucial to adopt appropriate management strategies.MethodsA panel of 24 microsatellite markers was used to genotype 844 animals representing the 17 most important native swine breeds and wild populations existing in Portugal and Spain and various statistical tools were applied to analyze the results.ResultsGenetic diversity was high in the breeds studied, with an overall mean of 13.6 alleles per locus and an average expected heterozygosity of 0.80. Signs of genetic bottlenecks were observed in breeds with a small census size, and population substructure was present in some of the breeds with larger census sizes. Variability among breeds accounted for about 20% of the total genetic diversity, and was explained mostly by differences among the Celtic, Mediterranean and Basque breed groups, rather than by differences between domestic and wild pigs. Breeds clustered closely according to group, and proximity was detected between wild pigs and the Mediterranean cluster of breeds. Most breeds had their own structure and identity, with very little evidence of admixture, except for the Retinto and Entrepelado varieties of the Mediterranean group, which are very similar. Genetic influence of the identified breed clusters extends beyond the specific geographical areas across borders throughout the Iberian Peninsula, with a very sharp transition from one breed group to another. Analysis of conservation priorities confirms that the ranking of a breed for conservation depends on the emphasis placed on its contribution to the between- and within-breed components of genetic diversity.ConclusionsNative pig breeds in Iberia reveal high levels of genetic diversity, a solid breed structure and a clear organization in well-defined clusters.

Dataset Information

Whole-genome resequencing analyses of five pig breeds, including Korean wild and native, and three European origin breeds.

Publications

Whole-genome resequencing analyses of five pig breeds, including Korean wild and native, and three European origin breeds.

Similar Datasets

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