Mitochondrial diversity and the origin of Iberian sheep
Mitochondrial diversity and the origin of Iberian sheep
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DOI：
10.1051/gse:2006034
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发表时间：
2007-01-01
影响因子：
4.1
通讯作者：
Bayon, Yolanda
中科院分区：
文献类型：
--
作者：
Pedrosa, Susana;Arranz, Juan-Jose;Bayon, Yolanda
对19个伊比利亚绵羊品种和6个国外绵羊品种的线粒体DNA多样性进行了分析。伊比利亚绵羊线粒体DNA有3个谱系（B、A和C），其中B型明显占优势。结果进行了分析，为每个形态确定的品种组在伊比利亚羊：美利奴，雅鲁藏布江，Churro和伊比利亚树干。MtDNA谱系C仅在由Montesina和Ojalada组成的伊比利亚主干中发现。这两个群体有很高的mtDNA变异，在伊比利亚绵羊只有美利奴布兰科有更多的变异。其他三个美利奴类型的研究表现出中度变异，包括最正宗的美利奴，西班牙美利奴。这三个美利奴紧密聚集在一个多维尺度代表的距离，而第四个品种（美利奴布兰科）表现出明显的分离。至于其他两个树干，品种从Churro组表现出更大的母亲的一致性，而结果包括在所谓的Musfino树干的人口似乎有一个更异质的母亲起源。所获得的结果进行了讨论与现有的数据从核标记和形态分类，所有这些信息进行了分析，在不同的伊比利亚绵羊品种的起源。
Mitochondrial DNA diversity was analysed in 19 Iberian and six foreign sheep breeds. Three mtDNA lineages (B, A and C) were found in the Iberian sheep, with type B clearly predominating over the others. The results were analysed for each of the morphologically determined breed groups in Iberian sheep: Merino, Entrefino, Churro and Iberian trunks. MtDNA lineage C was found only in the Iberian trunk composed of Montesina and Ojalada. These two populations had high mtDNA variability, and in the Iberian sheep only Merino Branco had more variation. The other three Merino types studied showed moderate variability, including the most authentic Merino, the Spanish Merino. These three Merinos clustered closely in a multidimensional scaling representation of distances, while the fourth breed (Merino Branco) showed a clear separation. As for the other two trunks, breeds from the Churro group showed greater maternal uniformity while results for populations included in the so-called Entrefino trunk seemed to have a more heterogeneous maternal origin. The results obtained are discussed with available data from nuclear markers and with morphological classifications, and all this information is analysed in relation to the origin of the different Iberian sheep breeds.