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在温室中,将供试的13个水稻品种和7个鉴别品种的幼苗用稻瘟病菌的11个菌株分别进行接种,以同等条件下鉴别品种对菌株的反应所确定的小种,作为供试品种对该小种的反应,然后应用生物间遗传学的原理和方法来推导品种和菌株的基因型。结果表明:供试的水稻品种和稻瘟病菌株(或小种)间存在17个限定性相应基因对,不同品种所含的抗病性基因数有所不同,其作用是在相应的无毒性菌株(或小种)存在情况下而表现出品种的抗病性基因愈多,可能表现的抗病力愈强。本研究结果为水稻抗稻瘟病育种选择抗原亲本以及生产上选用具有较多抗病基因的品种进行合理布局,提供了有重要参考价值的遗传学信息和依据。
In the greenhouse, the 11 tested rice varieties and the 7 identified cultivars were respectively inoculated with 11 strains of Magnaporthe oryzae to identify the race determined by the strain’s response to the strain under the same conditions, Varieties of the races of the reaction, and then applied the principles and methods of biological genetics to derive varieties and strains of genotypes. The results showed that there were 17 defined corresponding gene pairs between the tested rice varieties and Magnaporthe grisea (or races), and different cultivars contained different numbers of disease resistance genes. The effect was that in the corresponding non-toxic strains (Or races) in the presence of species and showed more resistance genes, the stronger the resistance may be manifested. The results of this study provide a rationale for the selection of antigens for rice blast resistance breeding and the selection of cultivars with more disease resistance genes in production and provide important genetic information and basis for reference.