Breeding of a recessive genic male sterile (GMS) hybrid variety Huyouza 1 with high yield and high disease resistance in Brassica napus L.

Huyouza 1 was bred through crossing between a restorer line Huyou 15 and a complete sterile line Hu 118A produced by a temporary maintainer line M-6029 and a recessive genic male sterile two-type line 20118AB in Brassica napus L.Its oil content in seeds was 41.12%,the erucic acid content in oil was 0.33%, and the glucosinolate content in meal was 25.08μmol/g.In the Shanghai rapeseed regional test,the variety's seed yield was 2474.6 kg/hm~2,11.9% higher than that of the control variety Huiyou 50 and 3.8% higher than that of the control variety Huyou 15.In the regional test of middle and lower reaches of the Yangtze,its seed yield was 2591.6kg/hm~2,15.35% higher than that of the control variety Zhongyou 821 and 8.20% higher than that of the control variety Wanyou 14.Huyouza 1 had high resistance to sclerotinium blight and virus dis- ease.