Breeding of a new high oil-content recessive genic male sterile hybrid variety 'Huyouza 6' of Brassica napus

'Huyouza 6',a new high oil-content hybrid variety of Brassica napus,was bred by matching of three lines—a high oil-content recessive genie male sterile homozygous two-type line 20228AB,a temporary maintenance line M-6029 and a restoring line 07129.Its seeds' oil percentage was up to47.02%,the erucic acid content of oil was 0.66%and the glucosinolate content of meal was19.35 μmol/g.In the two-year Shanghai regional test of rapeseed,the average seed and oil yields of'Huyouza 6' were 2 915.25 kg/hm~2 and 1 351.00 kg/hm~2,respectively increasing by 12.33%and17.32%over those of the control variety 'Huyou 15'.And in the Shanghai production test of rapeseed,its average seed and oil yields were 2 401.50 kg/hm~2 and 1 129.20 kg/hm~2,being respectively9.66%and 16.97%higher than those of the control variety 'Huyou 15'.