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玉米籽粒构型与产量性状的关系及QTL作图
引用本文:李永祥,王阳,石云素,宋燕春,王天宇,黎裕.玉米籽粒构型与产量性状的关系及QTL作图[J].中国农业科学,2009,42(2):408-418.
作者姓名:李永祥  王阳  石云素  宋燕春  王天宇  黎裕
作者单位:中国农业科学院作物科学研究所/农业部作物种质资源与生物技术重点开放实验室,北京,100081
基金项目:国家重点基础研究发展规划(973计划),国家自然科学基金,国家科技支撑项目,院所长基金 
摘    要: 【目的】探讨玉米籽粒构型性状(粒长、粒宽、粒厚、粒形等)与产量性状间的相互关系,进行籽粒构型性状相关QTL的检测与定位。【方法】以自交系齐319和黄早四构建的226个F2:3家系为试验材料,利用相关分析、主成分分析、出籽率模拟运算及QTL定位等方法,对在不同生态环境下(北京春播和河南夏播)玉米籽粒构型与产量性状间相关性进行探讨,并初步分析籽粒构型性状遗传基础。【结果】单穗产量与绝大多数籽粒构型性状显著相关,特别是与粒长的相关系数最高。主成分分析结果表明,对单穗产量影响较大的性状有粒长、粒厚、穗长、出籽率和粒长/穗半径。出籽率是影响果穗同化产物分配状况的衡量指标,受到粒长、粒长/穗半径、穗长和粒宽的显著影响。模拟运算亦表明粒长/穗半径与出籽率具有十分紧密的关系。对在两个生态环境下籽粒构型性状和产量性状的相关QTL进行了检测,共检测到了36个QTL。进一步分析发现,在不同生态环境下的部分QTL定位在相同的染色体区域;同时,还有不同性状的QTL定位在相同或临近的染色体区域。【结论】玉米籽粒构型性状与产量性状具有较高的相关关系,籽粒构型QTL与产量相关QTL的重叠区域对剖析玉米产量形成遗传机制可能具有重要的研究价值。

关 键 词:玉米  籽粒构型  产量  QTL
收稿时间:2008-1-25

Correlation Analysis and QTL Mapping for Traits of Kernel Structure and Yield Components in Maize
LI Yong-xiang,WANG Yang,SHI Yun-su,SONG Yan-chun,WANG Tian-yu,LI Yu.Correlation Analysis and QTL Mapping for Traits of Kernel Structure and Yield Components in Maize[J].Scientia Agricultura Sinica,2009,42(2):408-418.
Authors:LI Yong-xiang  WANG Yang  SHI Yun-su  SONG Yan-chun  WANG Tian-yu  LI Yu
Affiliation:Institute of Crop Science, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Germplasm Resources and Biotechnology, Ministry of Agriculture
Abstract:【Objective】 The correlation of traits of kernel structure with yield components was investigated and quantitative trait loci (QTL) for these traits were analyzed in this paper. 【Method】 Two hundred and twenty-six F2:3 lines from the cross of Qi 319×Huangzaosi in two different environments (spring-sown in Beijing and summer-sown in Henan) were used to conduct correlation analysis, principle component analysis, simulated calculation of rate of kernel production (RKP) and QTL mapping. 【Result】 Kernel yield per ear (KYE) showed significant correlation with most traits of kernel structure, especially with kernel depth (KD). Principle component analysis indicated that KD, kernel thickness (KT), ear length (EL), rate of kernel production (RKP) and KD/ear semidiameter (EsemiD) determined the performance of KYE. As the parameter reflecting the distribution of assimilation in ear, RKP was influenced by KD, KD/EsemiD, EL and Kernel Width (KW). Simulated calculation of RKP also showed that KD/EsemiD had a close relationship with RKP. A total of thirty-six QTLs for traits of kernel structure and yield components were detected. It was found that some QTLs detected in different environments were located in the same genetic regions. Several chromosomal regions with QTL cluster relevant to multiple traits were also detected. 【Conclusion】Traits of kernel structure have high correlations with yield components. The detection of genetic regions with QTL cluster might be helpful to the understanding of genetic mechanism of maize yield.
Keywords:QTL
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