水稻恢复系蓉恢902配合力研究

A Study on Combining Ability of “Rong Hui 902”,A Restorer of Rice

选用蓉恢 90 2等 6个恢复系与珍汕A等 5个不育系组成 6× 5不完全双列杂交试验 ,以测定蓉恢 90 2的产量、穗重、着粒密度、结实率、千粒重的配合力。试验结果 :蓉恢 90 2一般配合力以产量、穗重、着粒密度、结实率表现好 ,其相对效应值分别为 7.4、0 .7、9.4、3.8;千粒重的一般配合力较差 ,相对效应值为 - 7.0 ;特殊配合力以NJ5A/蓉恢 90 2表现最好 ,其产量、穗重、着粒密度、结实率的相对效应值分别为 1 1 .3、1 3.3、8.4、7.3。

To determine the combining ability of the yield, ear weight, grain density, frutification percent and 1000-grain weight of “Rong Hui 902”, a restorer of rice, 30 hybrid crosses were got with 6 restorers including “Rong Hui 902” and 5 sterile lines including “Zhengsan A”.The results showed that “Rong Hui 902” had higher GCA of the yield, ear weight, grain density, frutification percent , with the relative effect values 7.4, 0.7, 9.4, 3.8 respectively, and lower the combining ability of 1000-grain weight, with the relative effect value -7.0 , NJ5A/902 had best SCA, and the relative effect values of the yield, ear weight, grain density, frutification percent were 11.3,13.3,8.4 and 7.3 respectively.