多特征和单特征基因组选择对谷物Fe和Zn度在不同育种约束下的性能
Ephrem Habyarimana1, Sonal Chavan2, Chaitra Hugar3
1International Crops Research Institute for the Semi-Arid Tropics, Patancheru, 502324, India. Ephrem.Habyarimana@icrisat.org.
Scientific reports
|December 29, 2025
概括
基因组选择通过使用多特征模型来改善的生物强化. 这种方法提高了对铁和含量的预测准确度,减少了育种计划的成本和时间.
科学领域:
- 农业科学 农业科学
- 遗传学 是一个遗传学.
- 植物育种 植物育种
背景情况:
- 的生物强化对于解决人类微量营养素缺陷至关重要.
- 基因组选择 (GS) 为表型化育种群的挑战提供了解决方案,包括时间,成本和准确性.
- 评估不同环境和年龄的繁殖种群存在重大后勤障碍.
研究的目的:
- 评估基因组选择模型在提高谷物中铁 (Fe) 和 (Zn) 含量的有效性.
- 为了比较单特征基因组最佳线性无偏预测 (ST-GBLUP) 与多特征GBLUP (MT-GBLUP) 在资源有限的繁殖场景下的预测准确度.
- 研究将辅助农学特征纳入MT-GBLUP模型的影响.
主要方法:
- 将基因组选择 (GS) 技术应用于种群.
- 使用多特征基因组最佳线性无偏预测 (MT-GBLUP) 和单特征GBLUP (ST-GBLUP) 模型.
- 在各种繁殖资源限制下,对谷物Fe和Zn含量进行评估预测准确性 (PA).
主要成果:
- 在不同的繁殖场景中,MT-GBLUP始终表现出比ST-GBLUP更高的预测准确度.
- 将辅助农学特征的信息纳入MT-GBLUP显著增加了Fe (0.274) 和Zn (0.183) 的PA.
- 从更少位置的辅助特征借用信息,比使用更多环境中的相关特征产生更大的PA收益.
结论:
- 容易得分的非目标特征可以提高MT-GBLUP对目标特征 (Fe和Zn) 的基因组估计育种值的准确性.
- MT-GBLUP提供了一种资源高效的生物强化策略,减少了对广泛的多环境测试的需求.
- 这种方法有可能在种育种计划中加速每单位时间和成本的遗传收益.
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