Tuesday, September 11, 2007 - 1:15 PM

An Effective Select Procedure for Cotton Disease Resistant Breeding

Mrs. Xiangyun Zhang and Mr. Baosheng Guo. Cotton Research Institute, Hebei Academy of Agriculture and Forestry Sciences, Hepingxi Road 598, Shijiazhuang,Heibei, 050051, China

Cotton diseases are a serious detriment to maximum production in China. In the experiment, 161 upland cotton breeding parents, including introgressed lines from G. barbadense, and 53 the distant hybridization lines from G. hirsutum and G. barbadense were evaluated for Fusarium oxysporum and Verticillium dahliae resistance. Twenty-five lines were identified as resistant to Verticillium wilt with the wilt index of 21 lines under 20.0 and 4 lines were under 10.0, with the most resistant line having an index of only 4.3. These disease resistant lines were used to construct ‘Disease Resistant Target Trait Breeding Gene Bank,’ by intermating. This methodology has produced 11 new and improved cultivars with Verticillium resistance. This method is an effective selection procedure for cotton disease resistant breeding. 


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