Genetic diversity and pathotype structure of Magnaporthe grisea in partial rice growing areas of southern China
1995
Zhu Peiliang | Shen Ying (China National Rice Research Inst., Hangzhou, Zhejiang (China))
The MGR-DNA fingerprints of ca. 86 isolates of M. grisea in the partial rice growing areas of southern China have been studied with a dispersed repeated sequence probe MGE-586/EcoRI digest combination. The fingerprint data document a generalized genetic organization. Twenty-eight pathotypes of M. grisea can be distinguished into 18 lineages based on MGR-DNA fingerprint similarity. Each lineage has a limited host cultivar range and is associated with one to several related pathotypes, and this relationships between and among pathotypes are maintained over several years across broad geographic distribution. The genetic structure of M. grisea population could be analysed further in one rice growing area according to the present study. The macroscopic law of the epidemic disease to rice blast was studied by molecular ecological methods. It is the new research area to study ecological disease epidemics in molecular plant pathology
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