摘要
籼稻品种窄叶青８号是我国北方稻区水稻育种上重要的稻瘟病抗源之一。本文利用我国北方稻区的代表菌系中１０－８－１４和日本的代表菌系研５４－０４，对窄叶青８号与感病品种京系１７号和丽江新团黑谷的杂交Ｆ１Ｆ２、ＤＨ和Ｂ１Ｆ１群体进行抗病性鉴定，根据抗病性的分离，确认窄叶青８号的抗性由１对显性主效基因，即朱立煌等报道的Ｐｉ－ｚｈ基因控制。利用系研５４－０４接种窄叶青８号与９个具有已知抗病基因的鉴别品种杂交的Ｆ２群体，各群体都表现二基因的独立遗传，证明Ｐｉ－ｚｈ基因与Ｐｉ－ｉ、Ｐｉ－ｋｍ、Ｐｉ－ｚ、Ｐｉ－ｔａ、Ｐｉ－ｔａｚ、Ｐｉ－ｚｔ、Ｐｉ－ｋｐ、Ｐｉ－ｂ和Ｐｉ－ｔ等９个已知抗病基因间存在非等位关系，是新的抗稻瘟病基因。
ndica variety ZYQ8 is an important genetic resource resistant to rice blast disease in rice breeding in North Chinain this study,resistance identification of thepopulations of F1,F2,DH and B1F1of the crosses of ZYQ8×Jingxi17 (JX17) and ZYQ8×Lijiangxintuanheigu (LTH) was carried out by using a Chinese differential strain Zh10-8-14 from North China and a Japanese differential strain Ken54-04 from Japan and the results demonstrated that ZYQ8 had one dominant major gene Pi-zh which had been reported by Zhu LH,et al,The results from experiments in which the F2populations of ZYQ8×nine different varieties with known resistant genes were inoculated with strain Ken54-04 indicated that the gene Pi-zh was a new gene and non-allelic to nine known gene loci,namely Pi-i,Pi-km,Pi-z,Pi-ta,Pi-ta2,Pi-zt,Pi-kp,Pi-b and Pi-t
关键词
籼稻
抗病基因
稻瘟病
窄叶青8号
indica rice,Rice blast disease,Gene analysis,New gene
