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Correlations and QTL detection in maize family per se and testcross progenies for plant height and ear height

文献类型： 外文期刊

作者： Zhang, Yan 1 ; Li, Yongxiang 1 ; Wang, Yang 1 ; Peng, Bo 1 ; Liu, Cheng 2 ; Liu, Zhizhai 1 ; Tan, Weiwei 1 ; Wang, Di 1 ; Sh 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Food Crops, Urumqi 830000, Peoples R China

3.Southwest Univ, Chongqing 400716, Peoples R China

关键词： quantitative trait loci;marker-assisted selection;maize;cross-validation analysis

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

ISSN： 0179-9541

年卷期： 2011 年 130 卷 6 期

页码：

收录情况： SCI

摘要： The magnitude of genotypic correlations between family per se and testcross, r boolean AND g (per se, TC), is crucial for testing schemes in hybrid breeding as well as improvement of commercial hybrids. The objectives of this study were to identify the r boolean AND g (per se, TC), to examine the proportion of common QTL for both types of progenies and to determine the gene action of QTL identified for family per se and their value for the prediction of testcross progenies. Under multi-environments, r boolean AND g (per se, TC) were significant and higher than r boolean AND p (per se, TC), the phenotypic correlations between family per se and testcross for plant height and ear height in two maize crosses. The final fit for QTL explained 21.6-70.3% phenotypic variance and 24.4-79.4% genotypic variance for family per se. However, in cross-validation analysis (CV), the genotypic variance explained by all QTL was less than 60% for the two traits. Several common QTL (Chr. 1, Chr. 8 and Chr. 10) could be detected for both family per se and TC, which seems feasible to apply marker-assisted selection in maize breeding programmes.

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