在不同模拟的基因组选方案中,基因增益和近亲繁殖用于花的谷物产量和油含量
Huanhuan Zhao1,2, Majid Khansefid1,2, Zibei Lin2
1School of Applied Systems Biology, La Trobe University, Bundoora, VIC 3083, Australia.
Plants (Basel, Switzerland)
|June 19, 2024
概括
基因组选 (GS) 策略改善了对谷物产量和油含量而言的红杉种植. 多特征选择提供了比单特征方法更好的收益,关系控制管理内生育.
科学领域:
- 农业科学 农业科学
- 植物育种 植物育种
- 遗传学 是一个遗传学.
背景情况:
- 红杉 (Carthamus tinctorius L.) 是一个重要的作物,研究投资和遗传资源有限.
- 基因组选择 (GS) 提供了一种强大的方法,通过利用保存的遗传多样性来加速胚胎质的改善.
研究的目的:
- 为了比较四种基因组选择 (GS) 策略在松花育种计划中的有效性.
- 在繁殖周期中评估谷物产量 (GY) 和种子油含量 (OL) 的遗传收益和近亲繁殖水平.
主要方法:
- 模拟了四种不同的GS策略,用于花的反复选择.
- 使用索引对单特征GS,多特征GS和使用关系控制对多特征GS进行比较.
- 对模拟繁殖周期的遗传收益和内生系数的评估.
主要成果:
- 所有四种GS策略都表现出积极的遗传收益,初始周期产生了最显著的改善.
- 单一特征的GS最大限度地提高了目标特征的收益,但对其他特征的改善最小.
- 多特征GS策略,特别是使用指数的策略,在改善GY和OL方面表现优于单一特征策略.
- 结合亲属关系控制 (GS_GY + OL + Rel) 的多特征GS策略有效地减少了近亲繁殖,同时保持了可比的遗传收益.
结论:
- 基因组选择是一种可行的和有效的工具,用于增强松花繁殖计划.
- 多特征基因组选择策略优于单特征方法,可以同时提高谷物产量和油含量.
- 在多特征的GS中纳入交配关系控制可以减轻近亲繁殖抑郁症,确保在红杉中获得可持续的遗传收益.
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