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利用12个日本鉴别品种、7个中国鉴别品种、24个抗稻瘟病单基因系及6个当地主栽品种,对2006年采自该省主要积温区不同水稻品种的178个稻瘟病菌株进行了致病性测定。结果表明:2006年黑龙江省稻瘟病菌生理小种划分为104个日本小种,077.7号生理小种比例最高为4.49%,017.1号、017.5号、037.5号生理小种出现频率为3.93%。就抗性基因而言,抗瘟基因Pi9(t)在全省抗谱为97.75%,是较好的抗源可以在全省内广泛利用;Piz-5、Pi12(t)抗瘟基因抗谱分别为78.09%和78.65%,根据品种种植区域可以有选择地利用。就品种而言,抗瘟基因Pi9(t)、Piz-5是空育131;Pi5(t)、Pita-2是垦稻10号;Pi9(t)、Pita是上育397;Piz-5、Pi12(t)是垦稻12号等品种抗瘟改良的有利基因;在研究中同时加强对稻瘟病菌种群的监测和新抗源的发掘,有针对性地向主栽品种导入新的抗性基因。
A total of 178 M. grisea strains from different rice cultivars in the main accumulation area of the province in 2006 were analyzed using 12 Japanese differential lines, 7 Chinese differential lines, 24 blast-resistant single gene lines and 6 local cultivars Pathogenicity determination. The results showed that the physiological races of Magnaporthe grisea in 2006 in Heilongjiang province were divided into 104 Japanese races. The highest races of 077.7 races were 4.49%. The frequency of race 017.1, 017.5 and 037.5 was 3.93%. In terms of resistance genes, the anti-blast gene Pi9 (t) is 97.75% in the province, which is a good anti-source and can be widely used in the province. Piz-5, Pi12 (t) Respectively 78.09% and 78.65%, according to the variety of planting areas can be selectively used. In terms of cultivars, Pi9 (t), Piz-5 were Kong Yu 131; Pi5 (t), Pita-2 were Kenao 10; Pi9 Pi12 (t) was a favorable gene for improvement of blast resistance in cultivars such as Kenyao 12. In the study, the monitoring of M. grisea population and the exploration of new antigens were also carried out. Pi12 (t) was introduced into new cultivars Sexual gene.