利用历史农学数据开发基因组预测策略,在路易斯安那州的甘品种开发计划中进行早期克隆选择
Dipendra Shahi1, James Todd2, Kenneth Gravois3
1School of Plant, Environmental and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA.
The plant genome
|December 31, 2024
概括
基因组选择通过使用机器学习和基因组估计的育种值来准确预测诸如糖产量之类的特征,改善了甘的育种. 基于多个特征的早期选择显著提高了对甘关键特征的预测能力.
科学领域:
- 植物育种 植物育种
- 遗传学 是一个遗传学.
- 农业科学 农业科学
背景情况:
- 甘 (Saccharum L.) 是糖和生物燃料生产的全球重要作物.
- 加快遗传收益对于提高甘和糖在甘育种计划中的产量至关重要.
- 基因组选择 (GS) 提供了一种强大的方法来提高繁殖效率.
研究的目的:
- 评估基因组选择对多种甘特征的预测能力 (PA).
- 为了比较各种统计和机器学习模型对基因组预测的性能.
- 评估早期选择和标记物密度对育种计划结果的影响.
主要方法:
- 从567种甘基因型中利用了20451个单核酸多态 (SNP) 和基因组估计的繁殖值 (GEBV).
- 应用了22个统计和机器学习模型,包括随机森林和支持矢量机 (SVM).
- 分析了路易斯安那州甘育种计划五个阶段的数据,包括阶段内和跨阶段的预测.
主要成果:
- 具有高遗传性的特征 (例如,理论可回收糖 - TRS,茎重 - SW) 显示出更高的PA.
- 机器学习方法在预测具有低遗传性的特征以及TRS和糖产量 (SY) 的跨阶段预测方面表现出色.
- 考虑早期可用的特征 (茎数 - NS,TRS) 的多特征选择在后期阶段显著改善了SY的PA.
结论:
- 基因组选择,特别是机器学习模型,提高了甘关键特征的预测准确度.
- 使用多特征模型的早期选择可以大大提高对SY等重要的繁殖目标的预测能力.
- 优化的标记物密度 (约9091个SNP) 足以在甘育种中进行有效的基因组预测.
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