Analysis of mitochondrial DNA indicates that domestic sheep are derived from two different ancestral maternal sources: No evidence for contributions from urial and argali sheep
Analysis of mitochondrial DNA indicates that domestic sheep are derived from two different ancestral maternal sources: No evidence for contributions from urial and argali sheep
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DOI：
10.1093/jhered/89.2.113
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发表时间：
1998-03-01
影响因子：
3.1
通讯作者：
Lewalski, H
中科院分区：
文献类型：
--
作者：
Hiendleder, S;Mainz, K;Lewalski, H
为探讨绵羊的起源和系统发育关系，对5个欧洲绵羊品种、1个非洲绵羊品种、4个亚洲绵羊品种和几个欧洲绵羊品种（Ovis musimon）、乌拉尔绵羊品种（O. vignei boconyensis）和盘羊（O.阿蒙nigrimontana，O.结果表明，共鉴定出20种单倍型，分别分布于3个主要的系统发育群：乌利羊/盘羊、家羊/盘羊和家养绵羊。从分支，包括绵羊和国内绵羊，两个主要的国内绵羊血统是显而易见的。一个血统，称为欧洲血统，包含大多数的单倍型检测欧洲国内绵羊。另一个谱系称为亚洲谱系，由中亚和一些欧洲家养绵羊中发现的单倍型组成。这两个谱系之间的平均序列差异（0.72%）是类似的幅度之间的盘羊亚种。为了准确估计欧洲人和亚洲人mtDNA类型之间的序列差异，对每个谱系的一种动物以及一种鼠和鼠的线粒体控制区进行了完全测序。序列比较表明，亚洲和欧洲的家绵羊谱系的差异为4.43%。该序列与亚洲型的差异为4.52%，而与欧洲型的差异仅为1.36%。我们的数据支持这样的假设，即一些现代的家养绵羊和欧洲绵羊来自一个共同的祖先，并提供了一个额外的野生祖先的证据，而不是urial和盘羊组，这还有待确定。
To investigate the origins and phylogenetic relationships of domestic sheep, mitochondrial DNA (mtDNA) from 243 sheep of five European, one African, and four Asian breeds and several mouflon (Ovis musimon), urial (O. vignei bochariensis), and argali (O. ammon nigrimontana, O. a collium) were assayed for restriction fragment length polymorphisms (RFLP), Twenty haplotypes were identified which occurred in three major phylogenetic groups: urial/argali, mouflon/domestic, and domestic sheep. From the branches that contain mouflon and domestic sheep, two major domestic sheep lineages are apparent. One lineage, termed European lineage, contains the majority of haplotypes detected among European domestic sheep. These mtDNAs resemble mouflon haplotypes, The other lineage, termed Asian lineage, consists of haplotypes found in central Asian and some European domestic sheep. The mean sequence difference between these two lineages (0.72%) is of similar magnitude as that between two argali subspecies. To accurately estimate sequence differences between the European and Asian mtDNA types, the mitochondrial control region of one animal from each lineage and of one mouflon and urial were completely sequenced. Sequence comparisons show that Asian and European domestic sheep lineages differ by 4.43%. The mouflon sequence diverges from the Asian type by 4.52%, but by only 1.36% from the European type. Our data supports the hypothesis that some modern domestic sheep and European mouflon derive from a common ancestor and provide evidence of an additional wild ancestor, other than the urial and argali groups, which has yet to be identified.