| 玉米重要农艺性状的基因组预测分析 |
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| 引用本文： | 朱卫红,马娟,丁俊强.玉米重要农艺性状的基因组预测分析[J].玉米科学,2022,30(5):7-11. |
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| 作者姓名： | 朱卫红 马娟 丁俊强 |
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| 作者单位： | 河南省农业科学院粮食作物研究所, 郑州 450002;河南农业大学农学院, 郑州 450002 |
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| 基金项目： | 河南省农业科学院优秀青年基金项目(2020YQ04) |
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| 摘 要： | 基因组选择(GS， genomic selection)是一种利用覆盖全基因组的标记进行选择育种的方法。利用玉米自交系郑 683-1为轮回亲本， ZPH1388、 ZPH5和东 237为供体亲本构建的 BC3F5群体，对穗部和株型性状进行基因组预测分析，研究 2种交叉验证方式、 6种 GS方法和显著数量性状位点作为固定效应对预测准确性的影响。结果表明，相比 5折交叉验证， 10折交叉验证可以提高穗粒数、行粒数、株高和穗位高的预测准确性，但会降低穗行数和叶夹角的预测能力。相比随机效应模型，穗粒数、穗行数、行粒数和叶夹角将 1～2个 QTL作为固定效应可以提高基因组估计育种值的准确性，但将 1～5个 QTL作为固定效应会降低穗位高的预测能力。对于株高，贝叶斯 A和再生核希尔伯特空间将 1～5个 QTL作为固定效应可以提高预测的准确性。其他 4种方法，多数情况固定效应的加入会降低株高的预测能力。在穗粒数和株高中，基因组最佳线性无偏预测的准确性最高，略高于 4种贝叶斯方法。对于其他 4个性状，最优预测方法受不同交叉验证方式和固定效应模型的影响表现不一。
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| 关 键 词： | 玉米 基因组选择 随机效应模型 固定效应模型 |
| 收稿时间： | 2021/8/11 0:00:00 |
Genomic Prediction Analysis for Maize Important Agronomic Traits |
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| ZHU Wei-hong,MA Juan,DING Jun-qiang.Genomic Prediction Analysis for Maize Important Agronomic Traits[J].Journal of Maize Sciences,2022,30(5):7-11. |
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| Authors: | ZHU Wei-hong MA Juan DING Jun-qiang |
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| Institution: | Institute of Cereal Crops, Henan Academy of Agricultural Sciences, Zhengzhou 450002; College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China |
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| Abstract: | Genomic selection(GS) is one method that uses genome-wide markers to make selective breeding. In the present study, an BC3F5 population that was derived from maize inbred line 683-1(recurrent parent), and donor parents ZPH1388, ZPH5, and Dong237 was used to conduct genomic prediction analysis and to study impacts of two cross-validation methods, six GS methods, and significant quantitative trait loci(QTL) as fixed effects on prediction accuracy for ear and plant type traits. This will provide a guidance for applications of genomic prediction for maize ear and plant type traits. The results showed that compared to five-fold cross-validation, ten-fold cross-validation could improve the prediction accuracy of kernel number per ear, kernel number per row, plant height, and ear height, but could decrease the prediction ability of kernel row number and leaf angel. Compared to random effect model, the incorporation of 1-2 QTL as fixed effects could improve the accuracy of genomic estimated breeding value for kernel number per ear, kernel row number, kernel number per row, and leaf angle, whereas the incorporation of 1-5 QTL as fixed effects could decrease the prediction ability for ear height. For plant height, treating 1-5 QTL as fixed effect in Bayes A and reproducing kernel Hilbert space(RKHS) could improve the prediction accuracy, whereas for other methods, the incorporation of fixed effects could reduce the prediction ability in most cases. For kernel number per ear and plant height, the accuracy of genomic best linear unbiased prediction was the highest, which was slightly higher than that of four Bayes methods, and that of RKHS was the least. For other four traits, the best prediction methods varied due to the effects of cross-validation and fixed effect models. |
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| Keywords: | Maize Genomic selection Random effect model Fixed effect model |
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