Breeding of a recessive genic male sterile(GMS) hybrid variety Xiangnong 03 with double low in Brassica napus L.

Xiangnong 03,a recessive epistatic GMS hybrid variety of B.napus with low erucic acid and low glucosinolate contents in rapeseed,was bred by the Crop Breeding and Cultivation Research Institute,Shanghai Academy of Agricultural Sciences,and had such characteristics as high and stable seed yield and resistance to sclerotiniose and virosis.The seed yield of the variety was 2 815.5 kg/hm2 and 2 632.5 kg/hm2 respectively in the Shanghai Regional Rapeseed Test and the Shanghai Rapeseed Production Test and increased respectively by 19.1% and 5.3% over Huyou 15.Its oil content was 42.6% in seed,erucic acid content was 0.50% in oil,and glucosinolate content was 19.6 μmol/g in meal.