Evolution of wild cereals during 28 years of global warming in Israel
Evolution of wild cereals during 28 years of global warming in Israel
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DOI：
10.1073/pnas.1121411109
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发表时间：
2012-02-28
影响因子：
11.1
通讯作者：
Beiles, Avigdor
中科院分区：
文献类型：
--
作者：
Nevo, Eviatar;Fu, Yong-Bi;Beiles, Avigdor
气候变化是威胁生物多样性和人类文明的主要环境压力。通过未来的作物改良确保人类和动物的主食的最大希望取决于野生祖先。对10个野生二粒小麦(Triticum dicoccoides Koern.)对以色列的10个野生大麦种群和10个野生大麦种群分别在1980年和2008年进行取样，并对收集的样品进行表型和基因分型分析。在过去的28年里，我们见证了以色列这些野生谷物在开花时间和简单序列重复等位基因周转方面的深刻适应变化。已揭示的进化变化意味着，用于作物改良和人类粮食生产的遗传资源中存在未实现的风险。
Climate change is a major environmental stress threatening bio-diversity and human civilization. The best hope to secure staple food for humans and animal feed by future crop improvement depends on wild progenitors. We examined 10 wild emmer wheat (Triticum dicoccoides Koern.) populations and 10 wild barley (Hordeum spontaneum K. Koch) populations in Israel, sampling them in 1980 and again in 2008, and performed phenotypic and genotypic analyses on the collected samples. We witnessed the profound adaptive changes of these wild cereals in Israel over the last 28 y in flowering time and simple sequence repeat allelic turnover. The revealed evolutionary changes imply unrealized risks present in genetic resources for crop improvement and human food production.