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以 2个籼型杂交稻———汕优 6 3(A)和汕优 2 2 (B)、2个地方糯稻品种———黄壳糯 (C)和紫糯 (D)和 3个粳稻品种———合系 4 1(E)、楚粳 12 (F)和 812 6 (G)为材料进行抗病基因同源序列 (ResistanceGeneAnalogue ,RGA)遗传分析。结果表明 ,杂交稻品种间以及粳稻品种间的抗性遗传较为相似 ,其相似系数分别为 0 86和 0 84。糯稻品种间以及糯稻、杂交稻和粳稻间的抗性遗传差异较大 ,相似系数为 0 4 5。聚类分析表明 ,RGA结果与品种的系谱来源相吻合 ,与品种的田间抗性基本一致。根据品种的抗性遗传差异、农艺性状和经济性状的不同 ,在云南籼稻区的建水和石屏县以及温暖粳稻区的泸西县分别选用 5种 (A/C、A/D、B/C、B/D和A/B)和 2种 (E/C和E/F/G)不同的品种组合进行品种多样性混合间栽控制稻瘟病田间试验 ,结果表明 ,抗性遗传差异大 (相似性 :0 4 5～ 0 77)的 5个品种混合间栽组合对稻瘟病有极为显著的控制效果 ,尤其是在混合间栽中高度感病的优质地方稻品种稻瘟病的发病率、病情指数均有极显著的下降 ,防治效果达 5 4 4 7%～ 92 18% ;遗传差异较小 (相似性 :0 84～ 0 90 )的 2个混栽组合混栽对稻瘟病的控制效果不明显 ,稻瘟病的防治效果在 15 12 %～ 2 5 5 4 %。此外 ,品种抗性遗传和株高差异
Two indica hybrid rice varieties, Shanyou 6 3 (A) and Shanyou 2 2 (B), two glutinous rice cultivars --- Huanghuannuo (C) and purple waxy rice (D) and 3 japonica rice Varieties --- Linkage 4 1 (E), Chujing 12 (F) and 812 6 (G) were used for genetic analysis of ResistanceGeneAnalogue (RGA). The results showed that the inheritance of resistance among hybrid rice varieties and japonica rice varieties was similar, with similar coefficients of 0 86 and 0 84, respectively. The resistance genetic differences among glutinous rice varieties and between glutinous rice, hybrid rice and japonica rice were large with a similarity coefficient of 0 45. Cluster analysis showed that the RGA results were consistent with the pedigree sources of cultivars and were consistent with those of cultivars. Five varieties (A / C, A / D, B / C) were selected in Jianshui, Shibing County, Yunnan Province and Luxi County in warm japonica rice region, respectively, according to the genetic differences, agronomic traits and economic traits of cultivars. C, B / D and A / B) and two different combinations (E / C and E / F / G) were used to control the rice blast in field trials. The results showed that the genetic diversity of resistance Similarity: 0 4 5 ~ 0 77) of the five intercropping intercropping combinations of rice blast has a very significant control effect, especially in the intercropping medium high and moderately susceptible quality rice varieties of blast disease incidence, disease And the control effect reached 544 47% -92 18%. The control effect on the rice blast of the two mixed-planting combinations with small genetic difference (similarity: 0 84 ~ 0 90) was not significant Obviously, the control effect of rice blast in 15 12% ~ 2545%. In addition, the genetic resistance and plant height differences among breeds