摘要
现已报道玉米圆斑病菌有5个生理小种,分别为0号(CCR0)、1号(CCR1)、2号(CCR2)、3号(CCR3)和4号(CCR4)。CCR0菌株不侵染玉米,但可侵染杂草;CCR1菌株具有寄主专化性,可分泌专化性毒素HC-toxin;CCR2菌株毒性普遍较低;CCR3除可侵染玉米外,还可危害水稻,分泌水稻专化性毒素BZR-cotoxin;CCR4对含有B73遗传背景的自交系致病。CCR2主要分布于平原地区,而CCR3主要在冷凉的山区,CCR1和CCR4分布有限,近年来未见CCR0。我国已报道3个小种,分别为CCR1,CCR2和CCR3;CCR1和CCR2主要分布于东北地区,而西南地区以CCR3为主。一般认为CCR2是CCR1,CCR3的共同祖先,CCR2和CCR4亲缘关系较近,均可能从CCR0进化而来。
Five physiological races of Cochliobolus carbonum have been reported, C. carbonum race 0 （CCR0）, CCR1, CCR2, CCR3 and CCR4, respectively. CCR0 could not infect maize, but might cause leaf spot on grasses. CCR1 is host-specific, and produces host-specific toxin HC-toxin. In general, CCR2 has weak pathogenicity. CCR3 also infects rice except maize and produces rice-specific toxin BZR-cotoxin and, CCR4 can produce leaf spot on inbred lines with B73 background. CCR2 mainly distributes in coastal plain regions, CCR3 mainly in mountain areas, CCR1 and CCR4 in limited areas. CCR0 has not been discovered in the recent years. CCR1, CCR2 and CCR3 distribute in China, with CCR1 and CCR2 in the northeast, CCR3 in the southwest. Generally speaking, CCR2 is the common ancestor of CCR1 and CCR3, CCR2 is genetically closely related to CCR4 and they maybe evolved from CCR0.
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第3期411-415,共5页
Journal of Yunnan Agricultural University:Natural Science
基金
云南省科技支撑计划资助项目(2006NG19)
云南省农业产业技术体系资助项目
关键词
玉米圆斑病菌
生理小种
鉴别
分布
演化
Cochliobolus carbonum
physiological race
identification
geographic distribution
evolution
