热带玉米中合成种群的遗传收益和现场验证,使用选择指数和REML/BLUP
Antônia Maria de Cássia Batista de Sousa1, Marcela Pedroso Mendes Resende1, Ailton Jose Crispim-Filho1
1Escola de Agronomia, Universidade Federal de Goiás, Goiânia 74690-900, Brazil.
Plants (Basel, Switzerland)
|October 29, 2025
概括
选择优秀的热带玉米杂交需要有效的策略. 这项研究发现,虽然一些方法预测了高收益,但其他方法 (如基于BLUP的方法) 在实践中产生了更好的结果,突出了对综合选择方法的需求.
科学领域:
- 农业科学 农业科学
- 植物育种 植物育种
- 遗传学 遗传学是一种遗传学.
背景情况:
- 开发具有高异质化的热带玉米对于杂交育种计划至关重要.
- 精确的选择因基因型-表型相互作用和近亲繁殖抑郁症而复杂化.
研究的目的:
- 在经常性选择计划中评估五种选择策略 (史密斯-哈泽尔指数,基准指数,穆兰巴-莫克指数,谷物产量的REML/BLUP,内生抑制的REML/BLUP).
- 为了将预测的遗传收益与实现的现场性能进行比较.
主要方法:
- 使用商业玉米杂交的F2种群.
- 使用热图评估方法的一致性.
- 将预测的收益与实际现场表现进行比较.
主要成果:
- 穆兰巴-莫克指数和基准指数预测谷物产量和重的最高收益.
- 谷物产量的REML/BLUP显示预测产量最低,但实现了实现的产量最高.
- 观察到预测和实现的收益之间的差异,特别是基于BLUP的方法,这表明低估了添加剂的潜力.
结论:
- 通过REML/BLUP方法有效地识别出具有更高附加值的后代.
- 建议将基于BLUP的方法与表型指数相结合,以实现平衡的遗传改进和热带玉米育种的实现收益.
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