The Irish potato famine pathogen Phytophthora infestans originated in central Mexico rather than the Andes

Erica M. Goss; Javier F. Tabima; David E. L. CookeSilvia RestrepoWilliam E. FryGregory A. ForbesValerie J. FielandMartha CardenasNiklaus J. Grünwald

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The Irish potato famine pathogen Phytophthora infestans originated in central Mexico rather than the Andes

机译：The Irish potato famine pathogen Phytophthora infestans originated in central Mexico rather than the Andes

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Phytophthora infestans is a destructive plant pathogen best known for causing the disease that triggered the Irish potato famine and remains the most costly potato pathogen to manage worldwide. Identification of P. infestan's elusive center of origin is critical to understanding the mechanisms of repeated global emergence of this pathogen. There are two competing theories, placing the origin in either South America or in central Mexico, both of which are centers of diversity of Solanum host plants. To test these competing hypotheses, we conducted detailed phylogeographic and approximate Bayesian computation analyses, which are suitable approaches to unraveling complex demographic histories. Our analyses used microsatellite markers and sequences of four nuclear genes sampled from populations in the Andes, Mexico, and elsewhere. To infer the ancestral state, we included the closest known relatives Phytophthora phaseoli, Phytophthora mirabilis, and Phytophthora ipomoeae, as well as the interspecific hybrid Phytophthora andina. We did not find support for an Andean origin of P. infestans;rather, the sequence data suggest a Mexican origin. Our findings support the hypothesis that populations found in the Andes are descendants of the Mexican populations and reconcile previous findings of ancestral variation in the Andes. Although centers of origin are well documented as centers of evolution and diversity for numerous crop plants, the number of plant pathogens with a known geographic origin are limited. This work has important implications for our understanding of the coevolution of hosts and pathogens, as well as the harnessing of plant disease resistance to manage late blight.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2014年第24期|8791-8796|共6页
作者
Erica M. Goss; Javier F. Tabima; David E. L. CookeSilvia RestrepoWilliam E. FryGregory A. ForbesValerie J. FielandMartha CardenasNiklaus J. Grünwald;
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作者单位

Department of Plant Pathology and Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611;

Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331;

The James Hutton Institute, Invergowrie, Dundee DD2 5DA, ScotlandDepartment of Biological Sciences, University of the Andes, 110321 Bogota, ColombiaDepartment of Plant Pathology and Plant-Microbe Biology, Cornell University, Ithaca, NY 14853CIP China Center for Asia and the Pacific, International Potato Center, Beijing 100081, ChinaHorticultural Crops Research Laboratory, US Department of Agriculture Agricultural Research Service, Corvallis, OR 97330;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
biological invasion; coalescent analysis; oomycete; population genetics; stramenopile;

The Irish potato famine pathogen Phytophthora infestans originated in central Mexico rather than the Andes

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