【摘要】 根据1987年鉴定的2847份贵州地方水稻品种抗“两逆两病”性结果,从水平和垂直方向分析了抗性种质在全省的分布情况。结果表明:各种抗性种质频度,抗寒性材料居首位,达42.61％;抗旱性材料为34.53％;抗稻瘟病材料为18.50％,抗白叶枯病材料为16.52％。同时发现,全省抗稻瘟病的种质频度,随纬度的增加和经度的东移而逐渐下降,抗寒性种质频度随海拔增高和热量条件降低而上升。更多还原

【Abstract】 According to the result of identification on the resistance to"Two unfavorable factors and two diseases of 2847 local rice varieties in Guizhou province,the vechical and hornizolal distribution of the resistant germplasm in this province was analysed, The result presented among the frequencies of all kinds of resistant germplasm meterials, cold resistant possessed percentage of 42.61%, and drought resistant 34.53%, blast resistant 18.5% and baclerial blightresistant 16.52%. The study also demonstrated that the frequency of the blast resistant germplasm decreased with the latitude increasing and the longeti-tude moving towards the east, and the frequency of cold resistant germplasmincreased with the elevation increasing and the heat condition decreasing.更多还原