Population structure of Santa Inês sheep: the impact of genomic information.

IF 1.7 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Tamires de Sousa Silva, Fábio Barros Britto, José Lindenberg Rocha Sarmento, Ana Paula Soares E Silva Matias, Dayane Pereira de Castro, Fabiana Cristina Belchior de Sousa, Francisca Kauanne Carvalho Silva, Natanael Pereira da Silva Santos
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Abstract

Information on genetic diversity and population structure among sheep breeds is essential for genetic improvement, understanding environmental adaptation, as well as the utilization and conservation of sheep breeds. This research aims to analyze the genomic population structure of Santa Inês sheep managed on different properties in northeastern Brazil. A total of 390 individuals were genotyped for 52,744 SNPs. The six flocks evaluated showed population differentiation indices (pairwise Fst) ranging from 0.0342 to 0.0938. Estimates of gene flow showed high values, ranging from 0.89 to 1 (Nm) between flocks 2 and 3, which are from the same town. The average value for inbreeding (Fis) and the overall genetic differentiation index (Fst) were -0.05 and 0.06 respectively, observed in the F statistic for each of the loci analyzed in the six flocks. These results indicate that diversity is concentrated within populations. After the simulations using the Bayesian clustering method, the most probable number of genetic groups (K) detected was 5, where flock 4 and 6 form a single group. It can be concluded that the samples from the six flocks form five genetic populations with a level of diversity that has been conserved. The results of this study can contribute with important genetic information and can adequately help diversity within the breed, which provides a good opportunity for the sustainable use and maintenance of improvements in genetic resources in Santa Inês sheep populations in Brazil.

圣诞老人Inês羊种群结构:基因组信息的影响。
绵羊品种间遗传多样性和群体结构信息对绵羊品种的遗传改良、环境适应以及利用和保护具有重要意义。本研究旨在分析巴西东北部不同属性管理的Santa Inês羊的基因组群体结构。共有390人进行了52,744个snp的基因分型。6个鸡群的种群分化指数(Fst)在0.0342 ~ 0.0938之间。来自同一城镇的鸡群2和鸡群3之间的基因流估计值在0.89 ~ 1 (Nm)之间。6个鸡群各基因座的近交指数(Fis)和总遗传分化指数(Fst)的F统计值平均值分别为-0.05和0.06。这些结果表明,多样性集中在种群内。采用贝叶斯聚类方法模拟后,检测到的最可能遗传群数(K)为5个,其中第4群和第6群构成一个群体。结果表明,这6个禽群组成了5个遗传种群,具有一定程度的遗传多样性。本研究结果可以提供重要的遗传信息,充分促进品种多样性,为巴西Santa Inês羊群体遗传资源的可持续利用和改良提供了良好的机会。
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来源期刊
Tropical animal health and production
Tropical animal health and production 农林科学-兽医学
CiteScore
3.40
自引率
11.80%
发文量
361
审稿时长
6-12 weeks
期刊介绍: Tropical Animal Health and Production is an international journal publishing the results of original research in any field of animal health, welfare, and production with the aim of improving health and productivity of livestock, and better utilisation of animal resources, including wildlife in tropical, subtropical and similar agro-ecological environments.
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