摘要
利用我国7个统一鉴别品种鉴定2006—2008年从江西省31个水稻主产县（市）采集分离的195个稻瘟病菌有效单孢菌株，共鉴定到6群40个生理小种。所测菌株中ZB群出现频率最高，分布最广，为优势小种群。主要的优势小种为ZB13、ZB15、ZB5、ZA1，出现频率分别为14．36％、13．33％、6．67％、6．67％；3年中小种类群及优势小种的构成有一定的差异，在稻瘟病流行的2006年，小种类群以ZA和ZB为主，主要的优势小种为ZB13，和ZA1，频率分别为17．65％和11．76％；在稻瘟病中发偏轻的2007年和2008年，小种类群及优势小种的构成均较为一致，2年中小种类群均以ZB为主，如2008年优势小种为ZB15和ZB13频率分别为18．92％和10．81％；试验结果同时表明，同一穗瘟病标本中不同单孢菌株的生理小种不同，并讨论江西省稻瘟病菌生理小种的年度动态变化。
195 monoconidial cultures of the rice blast fungus （Magnaporthe grisea） sampled from 31 counties or cities in Jiangxi Province, China during 2006 - 2008 were isolated. The virulence of these isolates was assayed with 7 differentials. Forty races belonging to 6 groups could be differentiated, of which ZB group was the most prevalent group, the predominant races were ZB13 ,ZB15 ,ZB5 and ZA1 ,with the frequency of 14.36%, 13.33% ,6.67% and 6.67% respectively. There are some differences among predominant groups and races over the three years （2006 - 2008）. Most of the isolates belonged to ZA and ZB groups, and the predominant races were ZB13 and ZA1 , with the frequency of 17.65% and 11.76% respectively in 2006 when rice blast was in epidemic ; and the group and predominant races were similar over the years of 2007 - 2008 when the disease was moderately -light, most isolates belonged to ZB group, for instance, in 2008 the predominant races were ZB15 and ZB13 ,with the frequency of 18.92% and 10.81% respectively. The physiological races of different single isolates from the same sample were different. The dynamic of races over the three years is discussed in the paper.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2009年第6期1030-1034,共5页
Acta Agriculturae Universitatis Jiangxiensis
基金
江西省科技支撑重点项目(2007-2009)
江西省自然科学基金项目(2007GZN0755)
关键词
稻瘟病菌
生理小种
鉴定
江西省
rice blast fungus
physiological race
identification
Jiangxi Province
