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Genetic diversity of wild barley (Hordeum vulgare ssp. spontaneum) and its utilization for barley improvement

查看全文 作　　者：XiaoYing [1,2]Ma;Chao [1]Li;AiDong [1]Wang;RuiJun [1]Duan;GenLin [2]Jiao;Eviatar [3]Nevo;GuoXiong [1]Chen 高影响力作者 机构地区：[1]Extreme Stress Resistance and Biotechnology Laboratory, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences;[2]Shenzhen Fairy Lake Botanical Garden, Chinese Academy of Sciences;[3]Institute of Evolution and Department of Evolutionary & Environmental Biology, University of Haifa, Mount Carmel, Haifa 31905, Israel高影响力机构 出　　处：《Research in Cold and Arid Regions》索引2012年第4卷第6期,共9页高影响力期刊 基　　金：supported by 'One Hundred Talents' Project of The Chinese Academy of Sciences (Grant No.O827751002);The National Natural Science Foundation of China (Grant Nos. 30970449, 31170369, 31160036);the Ancell-Teicher Research Foundation of Genetic and Molecular Evolution for financial support 摘　　要：Wild barley(Hordeum vulgare spp.spontaneum) is the undisputed progenitor of cultivated barley and offers considerable potential as a genetic resource for barley improvement.Naturally occurring populations are distributed primarily across the Fertile Crescent,but secondary areas of diversity are also found in central Asia and Tibet.The pattern of its genetic diversity is non-random,and is structured on a global,regional and local scale.On a global scale,diversity follows ecogeography,while on a regional and local scale,it is more strongly determined by ecology.Populations growing in areas where the climate is unreliable and/or the soil is heterogeneous tend to retain the most diversity.A large number of accessions are currently conserved ex situ,but a high proportion of these have originated from the Fertile Crescent.Given the likelihood of future climate change,conserving germplasm both in situ and ex situ in the various regions where the species' currently existing is a research priority.The value of H.vulgare spp.spontaneum for the improvement of cultivated barley lies largely in its potential contribution to the levels of attainable pathogen resistance and abiotic stress tolerance. 关 键 词：遗传多样性 野生大麦 割手密 SSP 未来气候变化 栽培大麦 人口增长 非生物胁迫
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