作者
João L Nunes Maciel, Paulo C Ceresini, Vanina L Castroagudin, Marcelo Zala, Gerrit HJ Kema, Bruce A McDonald
发表日期
2014/1
期刊
Phytopathology
卷号
104
期号
1
页码范围
95-107
出版商
The American Phytopathological Society
简介
Since its first report in Brazil in 1985, wheat blast, caused by Magnaporthe oryzae (anamorph: Pyricularia oryzae), has become increasingly important in South America, where the disease is still spreading. We used 11 microsatellite loci to elucidate the population structure of the wheat blast pathogen in wheat fields in central-western, southeastern, and southern Brazil. No subdivision was found among the wheat-infecting populations, consistent with high levels of gene flow across a large spatial scale. Although the clonal fraction was relatively high and the two mating type idiomorphs (MAT1-1 and MAT1-2) were not at similar frequencies, the clone-corrected populations from Distrito Federal and Goiás, Minas Triangle, and São Paulo were in gametic equilibrium. Based on these findings, we propose that populations of the wheat blast pathogen exhibit a mixed reproductive system in which sexual reproduction is …
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JLN Maciel, PC Ceresini, VL Castroagudin, M Zala… - Phytopathology, 2014