论文部分内容阅读
系统分析中国育成的158个抗白叶枯病品种(系)的抗源系谱,并推断其抗病基因,比较了主要抗源的育种效果.结果表明,在育成抗病品种(系)中,籼稻抗源主要为 IR 系统,部分抗性中等的地方品种如矮种水田谷、花龙水田谷、玻璃占等也具有一定育种效果。IR 品种中,以 IR20,IR29转育品种(系)最多.粳稻主体抗源为农垦58、农垦57及其衍生抗病品种南粳11和南粳15。籼稻抗病基因多为 Xa-4,部分粳稻品种带有 Xa-3基因。BG90—2、IR29、农垦58具较好的直接转育效果,而 IR20则间接转育效果较强。抗病基因所处的遗传背景对抗源利用途径和价值均有一定影响。
The resistant gene lines of 158 resistant bacterial leaf blight cultivars (lines) bred in China were systematically analyzed and their resistance genes were inferred and the breeding effects of the main source of resistance were compared. The results showed that among the resistant varieties (lines) The resistance of indica rice is mainly IR system, and some local resistances with moderate resistance such as paddy field of short paddy field, valley of flower dragon paddy field and glass account for some breeding effect. Among the IR cultivars, the most cultivars (lines) were IR20 and IR29, and the main resistances of japonica rice were Nongken 58, Nongken 57 and their derived resistant varieties Nanjing 11 and Nanjing 15. Most of indica rice genes are Xa-4, while some japonica varieties contain Xa-3 gene. BG90-2, IR29, Nongken 58 had better direct transplanting effect, while IR20 had stronger indirect transplanting effect. The genetic background in which the disease resistance genes are located has some influence on the ways and values of the utilization of the sources of resistance.