不同矮源基因水稻对赤霉素和多效唑的敏感性

对携带sd q(t)等不同矮生基因的材料进行外源植物生长调节剂处理的研究表明,不同矮生基因对外源赤霉素(GA3 )的反应敏感性从敏感至不敏感依次为:d c(t),D 53,sd 1(籼 ),隐性高秆 (eui), sd 1, sd e(t) ] (特矮 ),d 29,multi dwarf(多基因矮秆),d 1,tallplant(野生型高秆), sd 6,d 32,sd g,sd q(t),sd 1, sd q] (黔农);对外源多效唑 (PP333)反应最为敏感的是携带sd q(t)、sd g和eui基因的材料,最不敏感的是多基因矮秆 83N1041和携带d 59的DM107 4.在非sd 1矮生基因的育种利用上,可以在苗期利用 50mg·L-1 GA3 或 30mg·L-1 PP333对部分矮生基因进行有效筛选,提高携带非sd 1矮生基因新品种的育种效率.

Sensitivity of dwarf rice varieties/lines to gebberellic acid and PP333

The response to gebberellic acid (GA_3) and PP333 of rice varieties/lines carrying different dwarf genes and gene combinations were studied at seedling stage. Among the dwarf genes tested, the new semi-dwarf gene sd-q(t) was insensitive to GA_3, whereas most of the others were sensitive. The order of sensitivity to GA_3 from the higher to the lower ranked as: d-c(t), D-53, sd-1 (indica), eui, sd-1 and sd-e(t) combination (TA), d-29, multi-gene combination, d-1, Sd-1 (tall plant), sd-6, d-32, sd-g, sd-q(t) and sd-1 and sd-q(t) combination (QN). And in PP333 test, sd-q(t), sd-g and eui were the most sensitive, and multi-gene combination variety 83N1041 and DM107-4 with d-59 were the most insensitive. The results suggested that the use of GA_3 or PP333 for screening some dwarf genes un-allelic to sd-1 at seedling stage was effective.