| 棉花IF2群体构建及其在纤维品质遗传和杂种优势研究中的应用 |
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| 引用本文： | 孔广超,秦利,徐海明,祝水金.棉花IF2群体构建及其在纤维品质遗传和杂种优势研究中的应用[J].作物学报,2010,36(6):940-944. |
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| 作者姓名： | 孔广超 秦利 徐海明 祝水金 |
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| 作者单位： | 1.浙江大学农业与生物技术学院农学系，浙江杭州310029；2石河子大学农学院，新疆石河子832002 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家公益性行业(农业)科研专项经费项目 |
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| 摘 要： | 以陆地棉重组自交系RIL为材料，采用RIL系间随机交配的方式构建了一个含有188个组合的IF2群体。对该群体的棉花纤维品质性状表现进行了评价，并采用A、D遗传模型对其纤维品质性状的遗传效应和杂种优势进行了分析。结果表明，陆地棉IF2群体中5个纤维品质性状均呈现良好的正态分布，且各性状的表型平均值大多与F1杂交种相近，具有明显的杂种优势。显性与环境的互作效应是控制棉花纤维品质遗传的主要因素，其次是基因的加性效应，环境因素对于棉花纤维品质的杂种优势表现巨大的影响，两个环境中预测到的杂种优势值具有明显的差异。IF2群体是棉花数量性状遗传和杂种优势预测的优良研究群体。
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| 关 键 词： | 棉花 IF2群体 纤维品质 杂种优势 |
| 收稿时间： | 2009-10-06 |
Construction of IF2 Population and Its Application in Studies on Genetic Effects and Heterosis for Fiber Quality in Upland Cotton (G hirsutum L.) |
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| KONG Guang-Chao,QIN Li,XU Hai-Ming,ZHU Shui-Jin.Construction of IF2 Population and Its Application in Studies on Genetic Effects and Heterosis for Fiber Quality in Upland Cotton (G hirsutum L.)[J].Acta Agronomica Sinica,2010,36(6):940-944. |
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| Authors: | KONG Guang-Chao QIN Li XU Hai-Ming ZHU Shui-Jin |
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| Institution: | 1.Agronomy Department,College of Agriculture and biotechnology,Zhejiang University,Hangzhou 310029,China,2Agronomy Department,Shihezi University,Shihezi 832002,China |
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| Abstract: | Genetic analysis and heterosis prediction for fiber quality are very important in cotton breeding. An immotalized F2 (IF2) population with 188 combination F1 in upland cotton was developed by random mating among recombinant inbred lines (RIL) derived from a intraspeciifc hybridization between HS46 and MARCABUCAG8US-1-88, and its fiber quality traits were evaluated. Based on the IF2 population, we analyzed the genetic effects and heterosis of cotton fiber with the additive-dominance genetic model. The results showed that the values of all the five fiber quality traits, fiber length (FL), fiber uniformity (FU), fiber micronaire (FM), fiber elongation (FE) and fiber strength (FS), were distributed normally, and wider variations than those of its RIL population were found for the five fiber quality traits in the IF2 population. The genetic dissection and heterosis prediction analyses indicated that a significant heterosis was found in fiber quality traits. The interaction effect between additive and environment played an important role in cotton fiber quality, following by the additive effect. Their heterosis was affected greatly by the environment effects, and there were significant difference between two environments in the experiment. All these results indicate that the IF2 population is an ideal research population in genetic analysis and heterosis prediction for cotton fiber quality and other agronomic characters. |
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| Keywords: | G hirsutum L Immotalized F2 population(IF2) Fiber quality Heterosis |
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