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Studies on the Breeding and Utilization of CMS 58A in B.campestris

DONG Zhen-sheng,LIU Chuang-She,JING Jun-sheng,DONG Jun-gang,LIU Xuan-xia, Gao Xiao-lan,LI Hong-bin,YAN Zhi-bing and XIE Fang-ning(College of Agronomy,Northwest A & F University,Yangling Shaanxi 712100,China)  
Sterlile plants,fertile plants and trace amount pollen plants was observed in F2 populations which originated from two partial sterile plants,discovered in inbred line S1815 in B.compestris in 1986.The selected 3 sterile plants were pollinated with selected 3 fertile plants in one-pair-one in successive 5 years,then 58A and 58B were developed.The test cross results showed that there are 7 restorers in winter rapeseed germplasm of Gansu and Shaanxi province in 306 accessories.A hybrid,named Baiza 1(58A/143C)was released by Shaanxi Crop Approval Committee in 2003 because its yield is 1 802.7 kg/hm2,increased by 17.37% than the check Qinyou 4.
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