Genetic diversity of Afrikaner cattle in southern Africa
Genetic diversity of Afrikaner cattle in southern Africa
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南部非洲南非荷兰语牛的遗传多样性
DOI：
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发表时间：
2018
影响因子：
1.7
通讯作者：
F. Neser
中科院分区：
文献类型：
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作者：
L. Pienaar;J. P. Grobler;M. Scholtz;H. Swart;K. Ehlers;M. Marx;M. MacNeil;F. Neser
南非白人是南非本土品种的“桑加”型肉牛沿着与品种，如Drakensberger和Nguni。六个复合品种已经开发出从杂交与南非白人。此外，阿非利卡人一直是通过回交在南非建立外来品种的基础。这项研究通过使用11个微卫星标记对来自南非和纳米比亚不同地理区域的27个牛群的1257头动物进行基因分型，研究了南非白人牛的遗传多样性。多位点分配，使用贝叶斯聚类算法的结构，揭示了三个潜在的基因型组。这些群体在地理上并不局限。在整个群体和标记中，无偏杂合度的比例范围为0.49至0.72，平均为0.57;每个位点的平均等位基因数范围为3.18至7.09，平均为4.81;等位基因丰富度范围为2.35至3.38，平均为2.67。它的结论是，低近交水平的2.7%和中度到高度的变化仍然存在于南非白人牛品种，尽管最近的动物数量下降。
The Afrikaner is an indigenous South African breed of “Sanga” type beef cattle along with breeds such as the Drakensberger and Nguni. Six composite breeds have been developed from crosses with the Afrikaner. Additionally, Afrikaner has been the base from which exotic breeds were established in South Africa through backcrossing. The study examined genetic diversity of Afrikaner cattle by genotyping 1257 animals from 27 herds in different geographic areas of South Africa and Namibia using 11 microsatellite markers. Multiple-locus assignment, performed using the Bayesian clustering algorithm of STRUCTURE, revealed three underlying genotypic groups. These groups were not geographically localized. Across herds and markers, the proportion of unbiased heterozygosity ranged from 0.49 to 0.72 averaging 0.57; mean number of alleles per locus ranged from 3.18 to 7.09, averaging 4.81; and allelic richness ranged from 2.35 to 3.38, averaging 2.67. It is concluded that a low inbreeding level of 2.7% and a moderate to high degree of variation still persists within the Afrikaner cattle breed, despite the recent decline in numbers of animals.
影响因子：
3.3
作者：
N. Rosenberg;T. Burke;K. Elo;M. Feldman;P. Freidlin;M. Groenen;J. Hillel;A. Mäki-Tanila;Michèle Tixier-Boichard;A. Vignal;K. Wimmers;S. Weigend
通讯作者：
N. Rosenberg;T. Burke;K. Elo;M. Feldman;P. Freidlin;M. Groenen;J. Hillel;A. Mäki-Tanila;Michèle Tixier-Boichard;A. Vignal;K. Wimmers;S. Weigend
影响因子：
9.8
作者：
Schaid, DJ;Guenther, JC;Thibodeau, SN
通讯作者：
Thibodeau, SN