摘要
为探讨甘蔗梢腐病病原菌菌株的群体结构及种内的分化,以采自广西、云南、福建和海南等不同地区的30个甘蔗梢腐病菌株为材料,通过初步的分子生物学鉴定,发现30个甘蔗梢腐病菌株分属于2个不同的病原种。利用KCl O3培养基诱导筛选获得Nit突变体,其中1个菌株没有产生Nit突变体,剩下的29个菌株共产生266个Nit突变体。营养体亲和群的测定结果表明:9个菌株的VCG没有同一性,1个菌株组成1个VCG;不同地理来源的甘蔗梢腐病菌株间互不亲和,分属于不同的VCG;同一地理来源的甘蔗梢腐病菌株间亦不亲和;暗示引起甘蔗梢腐病的串珠镰刀菌属群体内存在丰富的VCG多样性,在不同的栽种地区群体结构变化很大,并且营养体亲和性与菌株的地理来源及寄主品种都没有明显的相关性。
Sugarcane pokkah boeng disease has become an important disease in china. In order to analysis the population structure and the genetic differentiation in species of the pathogen. The 30 strains of Fusarium moniliforme were collected individually from the pokkah boeng samples in Guangxi, Yunan, Fujian and Hainan provinces in China. Based on the molecular biology analysis, 30 isolateds divide into two species. After single spore isolation, 266 nitrate-nonutilizing（Nit） mutants were got from 29 strains after these colony transplanted on potato sucrose agar medium with 1.5% KClO3（ KPS）; 1 strains can＇t produce nit mutant. Furthermore, vegetative compatibility of these strains were analyzed on MM plates. In this study, the results show that all of the 9 isolates don＇t have VCG with each other, or 1 strains correspond to 1 VCG. This phenomenon occur not only in the strains from different geographic origins but also in the strains from the different host varieties in the same geographic origins. All these results indicate there was abundant diversity of VCG in the population of F. moniliforme, and there was no obvious correlation between the vegetative compatibility and geographic origins or host varieties.
出处
《热带作物学报》
CSCD
北大核心
2016年第10期1949-1955,共7页
Chinese Journal of Tropical Crops
基金
地区科学基金项目(甘蔗梢腐病病原菌的致病性分化及其种属特异(LS)染色体区的基因鉴定31460374)
亚热带农业生物资源保护与利用国家重点实验室基础性专项研究课题(甘蔗梢腐病病原菌的基因组分析与致病基因的鉴定)
关键词
甘蔗梢腐病
串珠镰刀菌
NIT突变体
营养体亲和群
Sugarcane Pokkah Boeng Disease
Fusarium moniliforme
Nit mutant
Vegetative compatibility groups
