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《Southwest China Journal of Agricultural Sciences》 2008-06
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Determination of the combining ability of 4 restorers with rolled leaf in rice

MA Tian-jin1,YU Xian-quan1,2*,ZHAO Fu-sheng1,2(1.College of Agriculture,Guizhou University,Guizhou Guiyang 550025,China;2.Rice Research Institute,Guizhou University,Guizhou Guiyang 550025,China)  
The combining ability of 3 CMS lines,4 restorer lines and 12 combionations was analyzed by using the incomplete diallel crossing design(NCⅡ) and measuring length,rolling degree and basal angle of flag leaf,last second and third leaf,plant height,spike length,setting rate,grain density,length of unemergent panicle,1000-grain weight and yield per plant.The results showed that there were very significant difference in all measured agronomic characters between 12 combinations,there was obvious difference in GCA between the same character of different restorer lines and different restorer lines of the same character and there was obvious difference in relative value of SCA between different characters of the same combination or the same characters of different combinations.Therefore,the non-additive effect of different combinations was of diversity and there was a very significant positive correlation between the competitive advantage of the combinations and GCA of perants,SCA of the combinations.The correlation coefficient with generational combining ability(GCA) of parents was r=0.6735** and the correlation coefficient with special combining ability of combinations was r= 0.7912**.
【Fund】: 贵州省科技厅[黔科合NZ字(2005)3005-1];; 国家科技部科技支撑项目(2007BAD59B)
【CateGory Index】: S511
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