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Tibet as a potential domestication center of cultivated barley of China.

Ren X, Nevo E, Sun D, Sun G - PLoS ONE (2013)

Bottom Line: Our results showed that Tibetan wild barley distinctly diverged from Southwest Asian (Near East) wild barley, that Central Asian wild barley is related to Southwest Asian wild barley, and that Chinese domesticated barley shares the same haplotypes with Tibetan wild barley.Phylogenetic analysis showed a close relationship between Chinese domesticated barley and the Tibetan wild barley, suggesting that Tibetan wild barley was the ancestor of Chinese domesticated barley.Our results favor the polyphyletic origin for cultivated barley.

View Article: PubMed Central - PubMed

Affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.

ABSTRACT
The importance of wild barley from Qinghai-Tibet Plateau in the origin and domestication of cultivated barley has long been underestimated. Population-based phylogenetic analyses were performed to study the origin and genetic diversity of Chinese domesticated barley, and address the possibility that the Tibetan region in China was an independent center of barley domestication. Wild barley (Hordeum vulgare ssp. spontaneum) populations from Southwest Asia, Central Asia, and Tibet along with domesticated barley from China were analyzed using two nuclear genes. Our results showed that Tibetan wild barley distinctly diverged from Southwest Asian (Near East) wild barley, that Central Asian wild barley is related to Southwest Asian wild barley, and that Chinese domesticated barley shares the same haplotypes with Tibetan wild barley. Phylogenetic analysis showed a close relationship between Chinese domesticated barley and the Tibetan wild barley, suggesting that Tibetan wild barley was the ancestor of Chinese domesticated barley. Our results favor the polyphyletic origin for cultivated barley.

Show MeSH
The geographic distribution of sampled four barley nature populations: Southwest Asian wild barley (•), Central Asian wild barley (▴), Tibet an wild barley (★) and Chinese domesticated barley ().
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pone-0062700-g001: The geographic distribution of sampled four barley nature populations: Southwest Asian wild barley (•), Central Asian wild barley (▴), Tibet an wild barley (★) and Chinese domesticated barley ().

Mentions: Sequences of the Nam-1 were compared from four populations: wild barley of Southwest Asia, Central Asian and Tibet of China, and cultivated barley from China (Fig. 1). The total length of the Nam-1 sequences amplified was 950 bp. A total of 10 haplotypes were identified in the four natural populations, of which six haplotypes were population-specific, while four haplotypes were shared between populations and only one haplotype was shared by four populations. Comparison of haplotypes among wild barley populations revealed three haplotypes specific to the Tibetan wild barley population and four haplotypes unique to the Southwest Asian wild barley population. However, no haplotype specific to the Central Asian wild barley population was found. Only two haplotypes were identified in the cultivated barley population from China and presented in the Tibetan wild barley population (Table 1).


Tibet as a potential domestication center of cultivated barley of China.

Ren X, Nevo E, Sun D, Sun G - PLoS ONE (2013)

The geographic distribution of sampled four barley nature populations: Southwest Asian wild barley (•), Central Asian wild barley (▴), Tibet an wild barley (★) and Chinese domesticated barley ().
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3643926&req=5

pone-0062700-g001: The geographic distribution of sampled four barley nature populations: Southwest Asian wild barley (•), Central Asian wild barley (▴), Tibet an wild barley (★) and Chinese domesticated barley ().
Mentions: Sequences of the Nam-1 were compared from four populations: wild barley of Southwest Asia, Central Asian and Tibet of China, and cultivated barley from China (Fig. 1). The total length of the Nam-1 sequences amplified was 950 bp. A total of 10 haplotypes were identified in the four natural populations, of which six haplotypes were population-specific, while four haplotypes were shared between populations and only one haplotype was shared by four populations. Comparison of haplotypes among wild barley populations revealed three haplotypes specific to the Tibetan wild barley population and four haplotypes unique to the Southwest Asian wild barley population. However, no haplotype specific to the Central Asian wild barley population was found. Only two haplotypes were identified in the cultivated barley population from China and presented in the Tibetan wild barley population (Table 1).

Bottom Line: Our results showed that Tibetan wild barley distinctly diverged from Southwest Asian (Near East) wild barley, that Central Asian wild barley is related to Southwest Asian wild barley, and that Chinese domesticated barley shares the same haplotypes with Tibetan wild barley.Phylogenetic analysis showed a close relationship between Chinese domesticated barley and the Tibetan wild barley, suggesting that Tibetan wild barley was the ancestor of Chinese domesticated barley.Our results favor the polyphyletic origin for cultivated barley.

View Article: PubMed Central - PubMed

Affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.

ABSTRACT
The importance of wild barley from Qinghai-Tibet Plateau in the origin and domestication of cultivated barley has long been underestimated. Population-based phylogenetic analyses were performed to study the origin and genetic diversity of Chinese domesticated barley, and address the possibility that the Tibetan region in China was an independent center of barley domestication. Wild barley (Hordeum vulgare ssp. spontaneum) populations from Southwest Asia, Central Asia, and Tibet along with domesticated barley from China were analyzed using two nuclear genes. Our results showed that Tibetan wild barley distinctly diverged from Southwest Asian (Near East) wild barley, that Central Asian wild barley is related to Southwest Asian wild barley, and that Chinese domesticated barley shares the same haplotypes with Tibetan wild barley. Phylogenetic analysis showed a close relationship between Chinese domesticated barley and the Tibetan wild barley, suggesting that Tibetan wild barley was the ancestor of Chinese domesticated barley. Our results favor the polyphyletic origin for cultivated barley.

Show MeSH