Breeding of CMS 203A and Its Hybrid Chengyou No.1 in Brassica napus L.

A new winter hybrid Chengyou No.1 oilseed rape with erucic acid content 0.45%,glucosinolates contents 22.79μmol/g,oil content 42.14% was bred from a combination between 203A and 1266R and released in 2005 by the National Crop Approval Committtee.The yield of Chengyou No.1 was 2 630 kg/hm~2,1.21% higher than the checks Qinyou No.2 in national huanghuai regional test in 2002,and 2 998.4 kg/hm~2,4.08% higher than the check Qinyou No.2 in 2003.The yield is 2 580.6 kg/hm~2,1.79% lower than the check Qinyou No.2 in production test in 2004.