Directional Selection from Host Plants Is a Major Force Driving Host Specificity in Magnaporthe Species

文献类型： 外文期刊

第一作者： Zhong, Zhenhui

作者： Zhong, Zhenhui;Norvienyeku, Justice;Chen, Meilian;Bao, Jiandong;Lin, Lianyu;Wu, Xiaoxian;Cai, Zena;Zhang, Qi;Lin, Xiaoye;Huang, Jun;Xu, Linghong;Zhang, Honghong;Chen, Long;Chen, Xiaofeng;Lian, Bi;Lu, Guodong;Ebbole, Daniel J.;Wang, Baohua;Wang, Zonghua;Zhong, Zhenhui;Norvienyeku, Justice;Chen, Meilian;Bao, Jiandong;Lin, Lianyu;Chen, Liqiong;Lin, Yahong;Wu, Xiaoxian;Cai, Zena;Zhang, Qi;Lin, Xiaoye;Hong, Yonghe;Huang, Jun;Xu, Linghong;Zhang, Honghong;Chen, Long;Tang, Wei;Chen, Xiaofeng;Lian, Bi;Lu, Guodong;Wang, Baohua;Wang, Zonghua;Chen, Liqiong;Lin, Yahong;Hong, Yonghe;Tang, Wei;Wang, Baohua;Wang, Zonghua;Zheng, Huakun;Wang, Yanli;Zhang, Liangsheng;Tang, Haibao;Ebbole, Daniel J.

作者机构：

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2016 年 6 卷

页码：

收录情况： SCI

摘要： One major threat to global food security that requires immediate attention, is the increasing incidence of host shift and host expansion in growing number of pathogenic fungi and emergence of new pathogens. The threat is more alarming because, yield quality and quantity improvement efforts are encouraging the cultivation of uniform plants with low genetic diversity that are increasingly susceptible to emerging pathogens. However, the influence of host genome differentiation on pathogen genome differentiation and its contribution to emergence and adaptability is still obscure. Here, we compared genome sequence of 6 isolates of Magnaporthe species obtained from three different host plants. We demonstrated the evolutionary relationship between Magnaporthe species and the influence of host differentiation on pathogens. Phylogenetic analysis showed that evolution of pathogen directly corresponds with host divergence, suggesting that host-pathogen interaction has led to co-evolution. Furthermore, we identified an asymmetric selection pressure on Magnaporthe species. Oryza sativa-infecting isolates showed higher directional selection from host and subsequently tends to lower the genetic diversity in its genome. We concluded that, frequent gene loss or gain, new transposon acquisition and sequence divergence are host adaptability mechanisms for Magnaporthe species, and this coevolution processes is greatly driven by directional selection from host plants.

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