Eusebi P G, Cortés O, Dunner S, Cañón J
Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avenida Puerta de Hierro, s/n, 28040, Madrid, Spain.
Anim Genet. 2017 Dec;48(6):682-685. doi: 10.1111/age.12618. Epub 2017 Oct 11.
The Lidia bovine breed is distinguished for its low genetic exchangeability given its selection on aggressive behavior, its management uniqueness and its subdivided structure. In this study, we present a comprehensive genome-wide analysis of genetic diversity, population structure and admixture of 468 animals from Mexican and Spanish Lidia breed populations and 64 samples belonging to 10 Spanish native and American-creole breeds using 37 148 single nucleotide polymorphisms. We found similar average inbreeding values in the Lidia breed, with different distributions within groups; variability of inbreeding values among Spanish lineages was significant and no differences were found among the Mexican sub-populations. Together, the high F of the lineages and the behavior of the runs of homozygosity are consequences of the lineage's small effective population sizes, contributing to their inbreeding increase. Population admixture analysis discarded any influence on the genetic structure of the Lidia populations from the Spanish native and American-creole breeds. In addition, both Lidia populations depicted different genetic origins, with the exception of some Mexican individuals whose origins traced back to recent Spanish importations.
利迪亚牛品种因其在攻击性行为方面的选择、独特的管理方式和细分的结构而具有较低的基因交换性。在本研究中，我们使用37148个单核苷酸多态性，对来自墨西哥和西班牙利迪亚牛品种群体的468只动物以及属于10个西班牙本土和美洲克里奥尔品种的64个样本进行了全面的全基因组遗传多样性、群体结构和混合分析。我们发现利迪亚牛品种的平均近亲繁殖值相似，但群体内部分布不同；西班牙谱系间近亲繁殖值的变异性显著，而墨西哥亚群体间未发现差异。总体而言，谱系的高F值和纯合子片段的行为是谱系有效种群规模较小的结果，导致其近亲繁殖增加。群体混合分析排除了西班牙本土和美洲克里奥尔品种对利迪亚牛群体遗传结构的任何影响。此外，两个利迪亚牛群体呈现出不同的遗传起源，不过一些墨西哥个体的起源可追溯到近期从西班牙引进的牛只。
