Evolução de plantas não domesticadas(nativas/selvagens)

PNAS

Proceedings of the National Academy of Sciences of the United States of America

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Evolution of wild cereals during 28 years of global warming in Israel

1. Eviatar Nevo^a,¹,
2. Yong-Bi Fu^b,
3. Tomas Pavlicek^a,
4. Souad Khalifa^a,
5. Mordechai Tavasi^a, and
6. Avigdor Beiles^a

+ Author Affiliations

1. ^aInstitute of Evolution, University of Haifa, Mount Carmel, Haifa 31905, Israel; and
2. ^bPlant Gene Resources of Canada, Saskatoon Research Centre, Agriculture and Agri-Food Canada, Saskatoon, SK, Canada S7N 0X2

1. Contributed by Eviatar Nevo, December 29, 2011 (sent for review December 2, 2011)

Abstract

Climate change is a major environmental stress threatening biodiversity 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.

• climate warming
• phenotypic and genotypic diversity
• plant genetic resources

Footnotes

• ↵¹To whom correspondence should be addressed. E-mail: nevo@research.haifa.ac.il.

• Author contributions: E.N. and T.P. designed research; Y.-B.F., S.K., and M.T. performed research; E.N., Y.-B.F., M.T., and A.B. analyzed data; and E.N., Y.-B.F., T.P., and A.B. wrote the paper.
• The authors declare no conflict of interest.
• This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1121411109/-/DCSupplemental.