中南民族大学学报（自然科学版）2025，Vol.44Issue(4)：484-489,6.DOI:10.20056/j.cnki.ZNMDZK.20250407
鄂西南地区稻瘟病菌群体交配型和育性分析
Analysis of mating type and fertility of Magnaporthe oryzae population in Southwest Hubei
摘要
Abstract
Rice blast disease is the main limiting factor of rice yield and quality in the Wuling Moutain region.Previous studies have shown that the mating type and fertility of Magnaporthe oryzae(M.oryzae)population in this region are the potential causes of its strong pathogenicity.In this experiment,237 isolates of M.oryzae,collected from Southwest Hubei Province in 2017-2018,were characterized using molecular markers of mating type genes,evaluated for pathogenicity,high resolution melting analysis and analyzed for fertility.The results revealed that there were two mating types in M.oryzae population in Wuling Mountain area,with the ratio of these types shifting over the course of two years.The mating type MAT1-1 was dominant in 2017,while MAT1-2 was the main mating type of isolates in 2018.The number of successful infection of MAT1-1 isolates was more than that of MAT1-2 isolates in 2017,while MAT1-2 isolates had a higher rate of successful infections in 2018.A shift in the ratio of two mating types over the two-year period,which was consistent with the success rate of infection associated with different mating types.This suggests that the pathogenicity of M.oryzae in this region was related to its mating type.The results of confrontation culture of the above isolates showed that only 3 isolates produced sexual structure.However,no fertility was detected between them by the pairwise combination cross analysis.This study laid a foundation for further predicting the epidemic succession of M.oryzae population through the population structural characteristics in this region.关键词
稻瘟病菌/交配型/育性Key words
Magnaporthe oryzae/mating type/fertility分类
植物保护学引用本文复制引用
李伟康,董岩,韩旭晨,王春台,伍华明,徐鑫..鄂西南地区稻瘟病菌群体交配型和育性分析[J].中南民族大学学报（自然科学版）,2025,44(4):484-489,6.基金项目
国家自然科学基金资助项目(30971563) （30971563）
湖北省自然科学基金资助项目(2018CFB476) （2018CFB476）
湖北省自然科学重点项目(滚动创新群体)(2015CFA015) （滚动创新群体）
