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2001~2010年从江苏省五大水稻栽培区采集了1 269份水稻稻瘟病菌标样,分离获得818株单孢菌株,利用7个全国统一鉴别水稻品种进行鉴定,共获得7群40个生理小种。结果显示,ZG1群小种出现频率最高,达到58.3%,为优势小种;其次为ZB群小种,达到16.9%。江苏省稻瘟病菌种群在五大稻区分布不同,在徐州、盐城地区,稻瘟病菌小种类群较为简单,均出现了7群18个小种;在南京、苏州和南通地区,稻瘟病菌小种组成较为复杂,分别出现了7群22个小种、7群23个小种和7群21个小种,尤其在苏州地区,仅ZB群小种的类型就多达11个。2001~2010年优势小种ZG1始终保持高频率出现,2006年最高,达到了73%;2009年最低,为41.4%。ZB群小种在2009年出现频率达到了最高,为31.4%。2001~2010年稻瘟病菌种群监测结果说明,江苏省稻瘟病菌和主栽品种之间具有较高的亲和性。
From 2001 to 2010, 1 269 rice blast samples were collected from five major rice cultivation areas in Jiangsu Province. 818 isolates were isolated and identified using 7 nationally uniform rice cultivars. Seven populations of 40 small physiological Species. The results showed that the races of ZG1 races appeared the highest frequency (58.3%), which was the dominant races, followed by ZB races (16.9%). The populations of Magnaporthe grisea in Jiangsu Province were distributed differently in the five major rice regions. In Xuzhou and Yancheng, the small-sized populations of Magnaporthe grisea were relatively simple, and seven populations of 18 minor species appeared. In Nanjing, Suzhou and Nantong, The races were more complex with 7 races of 22 races, 7 races of 23 races and 7 races of 21 races, respectively. Especially in Suzhou, only 11 races of ZB races were found. The dominant race ZG1 kept its high frequency from 2001 to 2010, the highest in 2006, reaching 73%; the lowest in 2009 was 41.4%. ZB races in 2009 appeared the highest frequency of 31.4%. The monitoring results of M. grisea population from 2001 to 2010 showed that there was a high affinity between M. grisea and the main cultivars in Jiangsu Province.