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Genetic background analysis and breed evaluation of yiling yellow cattle

Journal of Integrative Agriculture 2017年第10期16卷 2246-2256页

作者： XU Ling ZHANG Wen-gang LI Jun-ya ZHU De-jiang XU Xiao-cheng TIAN Yan-zi XIONG Xiong GUO Ai-zhen CAO Bing-hai NIU Hong ZHU Bo WANG Ze-zhao LIANG Yong-hu SHEN Hong-xue CHEN Yan cattle Genetics and Breeding Innovation Team Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing 100193 P.R.China Animal Husbandry Technical Extension Station of yiling Yichang 443000 P.R.China Animal Husbandry and Veterinary Bureau of yiling Yichang 443000 P.R.China The State Key Laboratory of Agricultural Microbiology Huazhong Agricultural University Wuhan 430070 P.R. China Department of Animal Genetics and Breeding College of Animal Science and Technology China Agricultural University Beijing 100193 P.R.China

Traditionally, Chinese indigenous cattle is geographically widespread. The present study analyzed based on genome-wide variants to evaluate the genetic background among 157 individuals from four representative indigenous cattle breeds of Hubei Province of China： yiling yellow cattle （YL）, Bashan cattle （BS）, Wuling cattle （WL）, Zaobei cattle （ZB）, and 21 indi- viduals of Qinchuan cattle （QC） from the nearby Shanxi Province of China. Linkage disequilibrium （LD） analysis showed the LD of YL was the lowest （~=0.32） when the distance between markers was approximately 2 kb. Principle component analysis （PCA）, and neighbor-joining （NJ）-tree revealed a separation of yiling yellow cattle from other geographic nearby local cattle breeds. In PCA plot, the YL and QC groups were segregated as expected; moreover, YL individuals clustered together more obviously. In the N J-tree, the YL group formed an independent branch and BS, WL, ZB groups were mixed. We then used the FST statistic approach to reveal long-term selection sweep of YL and other 4 cattle breeds. According to the selective sweep, we identified the unique pathways of YL, associated with production traits. Based on the results, it can be proposed that YL has its unique genetic characteristics of excellence resource, and it is an indispensable cattle breed in China.

关键词： yiling yellow cattle breed evaluation principle component analysis neighbor-joining tree

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