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《JOURNAL OF SOUTHWEST AGRICULTURAL UNIVERSITY》 1997-06
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STUDIES ON THE NEGATIVE CORRELATION BETWEEN FIBER STRENGTH AND LINT YIELD IN COTTON

Zhang Xiangqiong; Zhang Dongming; Zhou Hongjun; Zhang Chao (Institute of Cotton, Sichuan Academy of Agricultural Sciences, Jianyang 641400)  
High fiber strength (25 g/tex) germplasms (S) selected from the progenies of the combinations of PD 4548 × Gossypium hirsutum L. race Mexicanum and Dalian 2 ( G.hirsutum) × Jinxian Zhongmian ( G.arboreum ) were crossed with commercially culitvated varietied with high lint percentage (H), or verticillium wilt resistant varieties (R) or early maturing high yielding varieties (Y), and FⅠs (SH, SR and SY) were obtained. Reciprocal crosses gave FⅡs (FⅠ 2 × FⅠ 2) and FⅢ S (FⅠ 2 × FⅡ 2). The fiber strength and various economic characters in different generations were recorded, and their genetic relations and recombination frequncies were analyzed. It was shown that the negative correlation between fiber strength and lint yield was mainly conditioned by gene linkage. The possibility of breaking such linkage in breeding practice and thus reducing the negative correlation between them and obtaining recombinants with high yield and good quality is discussed.
【Fund】: 四川省科委青年基金
【CateGory Index】: S562
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