在双种作物大米中,基因组选择与住宿相关的特征
Wenyu Lu1, Jicheng Yue2, Jinzhao Liu1
1College of Agriculture, South China Agricultural University, Guangzhou 510642, China.
Plants (Basel, Switzerland)
|March 14, 2026
概括
基因组选择通过增加耐药品种的比例,有效地提高了双种作物大米的存放抵抗力. 对内部节点长度等特征的间接选择比对曲电阻的直接选择更有效.
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:
- 基因组选择 (GS) 提供了一种强大的方法,可以加速在作物改进中获得复杂特征的遗传收益.
- 住宿是种植大米的一个主要挑战,对产量和质量产生重大影响,需要为抗性而进行育种.
研究的目的:
- 评估基因组选择对改善双种作物大米中七种住宿相关特征的有效性.
- 为了比较不同基因组选择模型 (GBLUP,BayesLASSO,LightGBM) 的性能,以预测准确度.
- 评估GS在提高抗沉积米品种的频率方面的潜力.
主要方法:
- 对438个加入的表型评估,包括内节长,抗曲,植物高度和它们的比例等特征.
- 使用GBLUP,BayesLASSO和LightGBM模型进行交叉验证和独立预测.
- 应用训练的GBLUP模型来预测3000米基因组项目 (3kRG) 数据集中的育种值.
主要成果:
- 与LightGBM相比,GBLUP和BayesLASSO模型在所有特征和季节都显示出更高的预测准确度.
- 与宿舍相关的特征的预测准确度从0.28到0.78不等,由于基因组遗传能力降低,曲抵抗的准确性较低.
- 发现植物的高度在遗传上独立于高峰曲阻力.
- 基因组选择成功地将选择的3kRG群体中,抗寄宿性加入的比例从31.40%提高到83.00%.
- 对内部节长的间接选择及其与植物高度的比率在识别抗沉降品种方面比对抗曲的直接选择更有效.
结论:
- 基因组选择是一种可行且有效的策略,用于培育耐住宿的双种作物米品种.
- 基于遗传性特征的间接选择可以提高产生抗性的繁殖效率.
- 这项研究为在米育种计划中实施GS提供了基础,以加速对抗性 lodging 的遗传改进.
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