当前位置: X-MOL 学术J. Hered. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Genetic Diversity and Population Structure of Dromedary Camel-Types
Journal of Heredity ( IF 3.1 ) Pub Date : 2020-06-12 , DOI: 10.1093/jhered/esaa016
Huda AlAskar 1 , Bader H Alhajeri 1 , Faisal Almathen 1, 2, 3 , Hasan Alhaddad 1
Affiliation  

The dromedary camel is a unique livestock for its adaptations to arid-hot environments and its ability to provide goods under extreme conditions. There are no registries or breed standards for camels. Thus, named camel populations (i.e. camel-types) were examined for genetic uniqueness and breed status. Camel populations are generally named based on: shared phenotype, country or region of origin, tribal ownership, or the ecology of their habitat. A dataset of 10 Short-Tandem Repeat markers genotyped for 701 individual camels from 27 camel-types was used to quantify genetic diversity within camel-types, compare genetic diversity across camel-types, determine the population genetic structure of camel-types, and identify camel-types that may represent true breeds. Summary statistics (genotyping call rate, heterozygosity, inbreeding coefficient FIS, and allelic frequencies) were calculated and population-specific analyses (pairwise FST, neighbor-joining tree, relatedness, Nei's genetic distance, PCoA, and STRUCTURE) were performed. The most notable findings were: (1) little variation in genetic diversity was found across the camel-types, (2) the highest genetic diversity measure was detected in Targui and the lowest was in Awarik, (3) camel-types from Asia (especially the Arabian Peninsula) exhibited higher genetic diversity than their counterparts in Africa, (4) the highest DeltaK value of population structure separated camel-types based on geography (Asia vs. Africa), (5) the most distinct camel-types were the Omani, Awarik, and the Gabbra, (6) camel-types originating from the same country did not necessarily share high genetic similarity (e.g. camel-types from Oman), and (7) camel-type names were not consistently indicative of breed status.

中文翻译:

单峰骆驼类型的遗传多样性和种群结构

单峰骆驼是一种独特的牲畜,因为它能够适应干旱炎热的环境,并且能够在极端条件下提供货物。没有骆驼的登记处或品种标准。因此,对命名的骆驼种群(即骆驼类型)进行了遗传独特性和品种状态的检查。骆驼种群的命名通常基于:共同的表型、原产国或地区、部落所有权或栖息地的生态。对来自 27 种骆驼类型的 701 只骆驼进行基因分型的 10 个短串联重复标记数据集用于量化骆驼类型内的遗传多样性,比较不同骆驼类型的遗传多样性,确定骆驼类型的种群遗传结构,并识别可能代表真正品种的骆驼类型。汇总统计(基因分型检出率、杂合性、近交系数 FIS、和等位基因频率)并进行群体特异性分析(成对 FST、相邻连接树、相关性、Nei 的遗传距离、PCoA 和结构)。最显着的发现是:(1)骆驼类型的遗传多样性几乎没有变化,(2)在 Targui 检测到最高的遗传多样性测量,在 Awarik 检测到最低,(3)来自亚洲的骆驼类型(尤其是阿拉伯半岛)表现出比非洲同类更高的遗传多样性,(4)基于地理(亚洲与非洲)分离骆驼类型的种群结构的最高 DeltaK 值,(5)最独特的骆驼类型是Omani、Awarik 和 Gabbra,(6) 来自同一国家的骆驼类型不一定具有高度的遗传相似性(例如来自阿曼的骆驼类型),
更新日期:2020-06-12
down
wechat
bug