• 研究与进展 •

### 转基因抗虫棉品种间杂交F1、F2竞争优势分析

1. 1. 山东棉花研究中心/农业部黄淮海棉花遗传改良与栽培生理重点实验室，济南250100；2. 东阿县农业局，山东 东阿 252201
• 收稿日期:2016-12-31 出版日期:2017-11-15 发布日期:2017-11-15
• 通讯作者: lrz1138@163.com
• 作者简介:孔凡金（1986―）男，硕士，kfj987@163.com
• 基金资助:
国家重点研发计划——“七大农作物育种”专项（2016YFD0101406）；山东省现代农业产业技术体系建设专项资金

### Analysis on Competitive Heterosis of Hybrid F1 and F2 between Transgenic Bt Varieties of Upland Cotton

Kong Fanjin1, Deng Yongsheng1, Shen Guifang1, Wang Jinghui1, Han Zongfu1, Wang Zongwen1, Duan Bing1, Zhang Lingshan2, Li Ruzhong1*

1. 1. Shandong Cotton Research Center/Key Laboratory of Cotton Breeding and Cultivation in Huanghuaihai Plain, Ministry of Agriculture, Jinan 250100, China; 2. Dong’e Agricultural Bureau, Dong’e, Shandong 252201, China
• Received:2016-12-31 Online:2017-11-15 Published:2017-11-15

Abstract: [Objective] The purpose of this study is to supply basis for selecting strong heterosis hybrid and the feasibility of F2 utilization, by evaluating yield heterosis and fiber quality traits of hybrid F1 and F2 generated by transgenic Bt varieties in upland cotton. [Method] Ten upland cotton varieties (lines) with good comprehensive characteristics were selected to produce 10 crosses, and four of them with better competitive heterosis (CH) in yield were screened out to analyze the lint yield and fiber traits of F1 and F2. [Result] The results indicated there was a strong CH in yield of F1, but the yearly variation was large. Hybrids performed better in the poor production year. The CH in yield decreased obviously in most of the F2 combinations. Further analysis showed that the decrease of boll weight was the main cause of drop of yield CH in F2. The fiber quality index in F2 showed a downward trend compared with F1, and the coefficient of range and variation(CV) increased. The coefficient of variation of quality traits was much lower than that of yield components, with a trend of F1 < SCRC 28 (CK) and F2 > F1. The CH of lint yield and fiber traits changed between F1 and F2 in different combinations. We screened out a combination with higher CH of yield in both F1 and F2, and with less decreased yield CH, fine fiber quality and light separation in F2. [Conclusion] The hybrids generated by transgenic Bt varieties in upland cotton characterized by strong adversity resistance and yield stability. Fine fiber quality and light separation in F2 came from crosses with the parents of fine fiber quality and small differences. So, it is possible for breeders to select valuable F2 combinations in production.

• S562.035.1
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