大豆疫霉菌单孢分离物生物学性状的遗传变异研究  

Genetic variation of Phytophthora sojae on biological characters of single-zoospore and single-oospore cultures

作　　者：左豫虎[1] 侯巨梅[2] 康振生[1] 崔素萍[2] 黄丽丽[1] 

机构地区：[1]西北农林科技大学植物保护学院,杨凌712100 [2]黑龙江八一农垦大学植物科技学院,大庆163319

出　　处：《植物病理学报》2006年第4期289-295,共7页Acta Phytopathologica Sinica

基　　金：国家重点基础研究发展规划项目(2002CB111406);长江学者和创新团队发展计划资助项目(200558);黑龙江省自然科学基金资助项目(TC2005-08)

摘　　要：本文研究了大豆疫霉菌单游动孢子无性分离物和自交单卵孢子分离物的菌丝生长速率、菌落形态、同宗配合性状、产孢量以及对甲霜灵敏感性的遗传变异。结果表明:菌落形态、生长速率和同宗配合性状在单游动孢子后代和自交后代可稳定遗传,控制上述性状的遗传因子是纯合的;大豆疫霉菌的游动孢子产生能力和对甲霜灵的敏感性在单游动孢子后代和自交后代中均发生连续性变异,表明这两种性状可能是数量遗传性状,也可能控制这两种性状的基因为杂合基因或细胞质遗传因子。Genetic variation of Phytophthora sojae on biological characters including mycelium growth rate, colony morphology, homothallism, sporulation and sensitivity to metalaxyl in both single-zoospore and singleoospore progenies were studied in vitro. Results showed that the colony morphology, growth rate and homothallic characters were all steadily inherited in both single-zoospore and single-oospore progenies, which indicated that genetic factors controlled these three characters were homozygous. However, sporulation of zoo- spore and sensitivity of P. sojae to metalaxyl were successive variation in both single-zoospore and singleoospore progenies, which suggested that the two characters were quantitative genetics. Another possibility was that these two characters were controlled by heterozygous genotype, or cytoplasmic genetic factors.

关 键 词：大豆疫霉菌 菌落形态 产孢能力 同宗配合性状 甲霜灵敏感性 遗传变异 

分 类 号：Q933[生物学—微生物学] S435.651[农业科学—农业昆虫与害虫防治]