Cymbron T, Loftus R T, Malheiro M I, Bradley D G
Centro de Estudos de Ciência Animal, Instituto de Ciências Biomedicas Abel Salazar, Portugal.
Proc Biol Sci. 1999 Mar 22;266(1419):597-603. doi: 10.1098/rspb.1999.0678.
A total of 49 samples from indigenous Portuguese cattle breeds were analysed for sequence variation in the hypervariable region of the mitochondrial DNA D-loop. Sequence comparison and phylogenetic analyses revealed that haplotypes fell into two distinct groups. These corresponded with two separate haplotype clusters into which, respectively, all African, or alternatively all sequences of European origin, have previously been shown to fall. Here, the majority of sequences of African type were encountered in three southern, as compared to three northern breeds. This pattern of African influence may reflect an intercontinental admixture in the initial origins of Iberian breeds, or it is perhaps an introgression dating from the long and influential Moorish occupation of the south of the Iberian peninsula.
对来自葡萄牙本土牛品种的49个样本进行了线粒体DNA D环高变区序列变异分析。序列比较和系统发育分析表明，单倍型分为两个不同的组。这与两个单独的单倍型簇相对应，此前已证明所有非洲单倍型或所有欧洲起源的序列分别属于这两个簇。在这里，与三个北方品种相比，在三个南方品种中发现了大多数非洲类型的序列。这种非洲影响模式可能反映了伊比利亚品种最初起源时的洲际混合，或者可能是可追溯到伊比利亚半岛南部长期且具有影响力的摩尔人占领时期的基因渗入。
