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利用一份从贵州引进的分蘖角度在分蘖期半散生、成熟后生长紧凑的水稻特异材料N360,全生育期直立型材料9308和对照材料蜀恢527为研究对象,调查3份材料全生育期分蘖角度的变化,结果表明:从分蘖盛期到成熟期,N360、蜀恢527和9308分蘖角度减小度数分别为30、14和7,°N360具有典型的分蘖角度动态变化特点;将N360与9308杂交,构建F2代定位群体,测量亲本和F2代定位群体分蘖角度的动态变化,采用极端集团-隐性群法,并利用SSR分子标记,初步定位了控制分蘖角度动态型变化的一个主效基因于第9染色体上SSR分子标记RM201和RM215之间,遗传距离分别为21.6和19.0 cM。此外,讨论了这种水稻分蘖角度动态变化性状在育种上的应用。
Using a tillering angle introduced from Guizhou at the tillering stage of semi-random, mature paddy rice-specific material N360, upright growth-type material 9308 and control material Shuhui 527 as the research object to investigate the three full-term growth period Tillering angle. The results showed that the decreasing degree of tiller angle of N360, Shuhui 527 and 9308 was 30, 14 and 7 respectively from tillering stage to maturing stage, and N360 had typical tiller angle dynamic characteristics. 9308 were used to construct the F2 locus population. The dynamic changes of tillering angle of parents and F2 locus population were measured. Using extreme group-recessive group method and SSR molecular marker, the main effect of controlling the dynamic change of tiller angle The gene was between SSR markers RM201 and RM215 on chromosome 9 with genetic distances of 21.6 and 19.0 cM, respectively. In addition, the application of this dynamic tiller angle variation in breeding was discussed.