Tibet is one of the centers of domestication of cultivated barley
Tibet is one of the centers of domestication of cultivated barley
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DOI：
10.1073/pnas.1215265109
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发表时间：
2012-10-16
影响因子：
11.1
通讯作者：
Zhang, Guoping
中科院分区：
文献类型：
--
作者：
Dai, Fei;Nevo, Eviatar;Zhang, Guoping
近东新月沃地是公认的大麦起源、多样性和驯化的主要中心。大量的野生大麦是从西藏高原采集的，那里的环境非常恶劣。利用全基因组多样性阵列技术标记分析了近东野生大麦和西藏野生大麦的基因型划分。我们的研究结果证实了西藏野生大麦的存在，并表明近东野生大麦和西藏野生大麦之间的分裂发生在大约276万年前（Mya）。为了测试大麦的多系驯化的概念，我们描述了一组世界各地的栽培大麦。一些中国裸大麦和六棱大麦与西藏野生大麦亲缘关系较近，但与其他栽培大麦没有共同祖先。我们的数据支持栽培大麦多系驯化的概念，并表明青藏高原及其邻近地区是栽培大麦驯化的中心之一。本研究结果对发掘大麦优良种质，特别是抗寒抗旱种质具有重要意义。
The Near East Fertile Crescent is well recognized as a primary center of barley origin, diversity, and domestication. A large number of wild barleys have been collected from the Tibetan Plateau, which is characterized by an extreme environment. We used genome-wide diversity array technology markers to analyze the genotypic division between wild barley from the Near East and Tibet. Our results confirmed the existence of Tibetan wild barley and suggested that the split between the wild barleys in the Near East and those in Tibet occurred around 2.76 million years ago (Mya). To test the concept of polyphyletic domestication of barley, we characterized a set of worldwide cultivated barley. Some Chinese hulless and six-rowed barleys showed a close relationship with Tibetan wild barley but showed no common ancestor with other cultivated barley. Our data support the concept of polyphyletic domestication of cultivated barley and indicate that the Tibetan Plateau and its vicinity is one of the centers of domestication of cultivated barley. The current results may be highly significant in exploring the elite germplasm for barley breeding, especially against cold and drought stresses.