转基因抗虫棉品种间杂交F1、F2竞争优势分析

doi:10.11963/1002-7807.kfjlrz.20171017

摘要/Abstract

摘要： 【目的】分析评估多个转基因抗虫棉品种间杂交F₁、F₂产量与纤维品质性状，为强优势组合选育以及F₂利用的可行性提供依据。【方法】以10个综合性状优良的陆地棉新品种（系）作亲本，组配10个杂交组合，从中筛选出产量竞争优势突出的4个组合，进行F₁、F₂产量与纤维品质性状分析。【结果】棉花品种间杂交F₁表现出较强的产量竞争优势，但年际差异较大，越是在产量水平较低的年份，杂交种产量竞争优势越突出。除个别组合外，F₂产量竞争优势减退明显，铃重降低是其主要原因。F₂纤维品质指标总体上较F₁下降，极差和变异系数增大。各品质性状的变异系数远低于产量构成要素的变异系数，总的趋势是F₁＜常规对照品种鲁棉研28号（CK）、F₂＞F₁。不同组合F₁、F₂代产量和纤维品质性状的竞争优势差异较大，从中筛选出1个优势组合，其F₁、F₂产量均具竞争优势，且F₂产量竞争优势减退小、纤维品质优良、分离轻。【结论】转基因抗虫棉品种间杂交种抗逆性强、稳产性好。父母本纤维品质好、差异小的组合，F₂纤维品质优良、分离程度较小。选育生产上有利用价值的F₂优势组合是可行的。

关键词: 陆地棉; 杂交种; 竞争优势; 纤维品质; 变异系数

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 F₁and 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 F₂combinations. 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 F₂in 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.

Key words: upland cotton; hybrid; competitive heterosis; fiber quality; coefficient of variation

中图分类号:

S562.035.1

孔凡金, 邓永胜, 申贵芳, 王景会, 韩宗福, 王宗文, 段冰, 张令山, 李汝忠. 转基因抗虫棉品种间杂交F₁、F₂竞争优势分析[J]. 棉花学报, 2017, 29(6): 504-512.

Kong Fanjin, Deng Yongsheng, Shen Guifang, Wang Jinghui, Han Zongfu, Wang Zongwen, Duan Bing, Zhang Lingshan, Li Ruzhong. Analysis on Competitive Heterosis of Hybrid F₁ and F₂ between Transgenic Bt Varieties of Upland Cotton[J]. Cotton Science, 2017, 29(6): 504-512.

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https://journal.cricaas.com.cn/Jweb_mhxb/CN/Y2017/V29/I6/504

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转基因抗虫棉品种间杂交F₁、F₂竞争优势分析

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

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