Identification and population genetic analyses of copy number variations in six domestic goat breeds and Bezoar ibexes using next-generation sequencing

被引：14

作者：

Guo, Jiazhong ^{[1
]}

Zhong, Jie ^{[1
]}

Liu, George E. ^{[2
]}

Yang, Liu ^{[1
]}

Li, Li ^{[1
]}

Chen, Guangling ^{[3
]}

Song, Tianzeng ^{[4
]}

Zhang, Hongping ^{[1
]}

机构：

[1] Sichuan Agr Univ, Coll Anim Sci & Technol, Chengdu 611130, Peoples R China

[2] ARS, Anim Genom & Improvement Lab, BARC, USDA, Beltsville, MD 20705 USA

[3] Sichuan Tech Exchange Ctr, Sci & Technol Dept Sichuan Prov, Chengdu 610016, Peoples R China

[4] Tibet Acad Agr & Anim Husb Sci, Inst Anim Sci, Lhasa 850009, Peoples R China

来源：

BMC GENOMICS | 2020年 / 21卷 / 01期

关键词：

Goat; Copy number variations; Short-read sequencing; Comparative genomics; OLFACTORY RECEPTOR GENES; EVOLUTIONARY DYNAMICS; SELECTION SIGNALS; PAIRED-END; ASIP GENE; GENOME; ADAPTATION; MUTATIONS; DELETION; CATTLE;

D O I：

10.1186/s12864-020-07267-6

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Background: Copy number variations (CNVs) are a major form of genetic variations and are involved in animal domestication and genetic adaptation to local environments. We investigated CNVs in the domestic goat (Capra hircus) using Illumina short-read sequencing data, by comparing our lab data for 38 goats from three Chinese breeds (Chengdu Brown, Jintang Black, and Tibetan Cashmere) to public data for 26 individuals from three other breeds (two Moroccan and one Chinese) and 21samples from Bezoar ibexes. Results: We obtained a total of 2394 CNV regions (CNVRs) by merging 208,649 high-confidence CNVs, which spanned similar to 267Mb of total length and accounted for 10.80% of the goat autosomal genome. Functional analyses showed that 2322 genes overlapping with the CNVRs were significantly enriched in 57 functional GO terms and KEGG pathways, most related to the nervous system, metabolic process, and reproduction system. Clustering patterns of all 85 samples generated separately from duplications and deletions were generally consistent with the results from SNPs, agreeing with the geographical origins of these goats. Based on genome-wide F-ST at each CNV locus, some genes overlapping with the highly divergent CNVs between domestic and wild goats were mainly enriched for several immunity-related pathways, whereas the genes overlapping with the highly differentiated CNVs between highland and lowland goats were mainly related to vitamin and lipid metabolism. Remarkably, a 507-bp deletion at similar to 14kb downstream of FGF5 on chromosome 6 showed highly divergent (F-ST=0.973) between the highland and lowland goats. Together with an enhancer activity of this sequence shown previously, the function of this duplication in regulating fiber growth deserved to be further investigated in detail. Conclusion: We generated a comprehensive map of CNVs in goats. Many genetically differentiated CNVs among various goat populations might be associated with the population characteristics of domestic goat breeds.

引用

页数：13

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