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Yihui1577 was bred after over 10 generations by crossing R16 and Yunnan purple rice.Many new hybrid rice varieties had been bred with Yihui1577,of which Gangyou1577,Ⅱyou1577,Nyou1577 and Yixiang1577 were certified by Sichuan Province Crop Variety Release Committee,Gangyou1577 and Yixiang1577 were certified by National Crop Variety Release Committee.The series varieties bred with Yihui1577 had been used widely with accumulated areas of 1 200 000 hm2.By using Yihui1577 as breeding material,an excellent restore line Yihui 3003 and some other restore lines,such as Yihui1979,Yihui 315 with good rice quality and good combination ability had been bred.Analysis of combination ability and stability about restore line Yihui1577 was made by using agricultural experimentation and statistical approach.The combination ability analysis was made in complete dual crossing method with 4 CMS lines and 6 restorer lines.It showed that the general combination ability effect value of Yihui1577 was 0.226,while Minghui63 was-0.113.So the general combination ability of Yihui1577 was prior to that of Minghui 63.Stability analysis showed that the F value of Gangyou1577 was 1.81378,while Sanyou 63 was 1.40327,both didn’t reach significant level.So Gangyou1577 had the same stability as Sanyou63.The same conclusion had got in the stability analysis of the breeds ofⅡyou 1577,Yixiang1577,Nyou 1577 and so on.
Yihui1577 was bred after over 10 generations by crossing R16 and Yunnan purple rice. Many new hybrid rice varieties had been bred with Yihui1577, of which Gangyou1577, Ⅱyou1577, Nyou1577 and Yixiang1577 were certified by Sichuan Province Crop Variety Release Committee, Gangyou 1577 and Yixiang1577 by the National Crop Variety Release Committee. The series of varieties bred with Yihui 1577 had been used widely with accumulated areas of 1 200 000 hm2.By using Yihui 1577 as breeding material, an excellent restore line Yihui 3003 and some other restore lines, such as Yihui 1979, Yihui 315 with good rice quality and good combination ability had been bred. A analysis of combination ability and stability about restore line Yihui 1577 was made by using agricultural experimentation and statistical approach. The combination ability analysis was made in complete dual crossing method with 4 CMS lines and 6 restorer lines .It showed that the general combination ability effect effect of Yihui1577 was 0.226, wh ile Minghui63 was-0.113.So the general combination ability of Yihui1577 was prior to that of Minghui 63.Stability analysis showed that the F value of Gangyou1577 was 1.81378 while while Sanyou 63 was 1.40327, both did not reach significant level.So Gangyou1577 had the same stability as Sanyou63. the same conclusion had got in the stability analysis of the breeds of IIyou 1577, Yixiang 1577, Nyou 1577 and so on.