在IRRI的盐度育种和精英小组开发中的遗传收益作为未来的育种资源
Apurva Khanna1, Mahender Anumalla1, Joie Ramos1
1Rice Breeding Innovation Platform, International Rice Research Institute (IRRI), 4031, Los Baños, Laguna, Philippines.
概括
这项研究估计了米育种计划中对盐分耐受性的遗传收益. 观察到每年显著的遗传收益,为开发改进的高产,耐盐米品种铺平了道路.
科学领域:
- 植物育种 植物育种
- 遗传学 遗传学 是一个
- 农业学是一种农业学.
背景情况:
- 盐度是一个主要的非生物压力,限制了全球大米生产.
- 估计遗传收益对于评估育种计划的成功和优化未来策略至关重要.
- 国际大米研究院 (IRRI) 开展了广泛的盐度育种计划.
研究的目的:
- 在IRRI,菲律宾和孟加拉国估计大米谷物产量对盐度耐受性的遗传收益.
- 为了确定精英基因型的未来盐度耐受性育种小组.
- 为了评估释放的米品种的遗传趋势.
主要方法:
- 分析来自IRRI,菲律宾和孟加拉国的历史试验数据.
- 采用两阶段混合模型方法与实验设计因素和关系矩阵的应用.
- 根据谷物产量和可靠性的育种价值选择顶级基因型.
主要成果:
- 观察到积极的遗传趋势:菲律宾IRRI每年0.1%,孟加拉国每年0.31%.
- 产量优势为每年1.52公斤/公 (菲律宾IRRI) 和14.02公斤/公 (孟加拉国).
- 选择了145种精英基因型,在谷物产量方面具有高育种价值 (>2400公斤/公在IRRI,>3500公斤/公在孟加拉国).
结论:
- 在IRRI的盐度育种计划中取得了显著的遗传收益.
- 精英育种小组的形成对于未来的进步至关重要.
- 建议将循环选择与基因组选择和速度繁殖相结合,以获得更高的遗传收益.
相关概念视频
01:18Dihybrid Crosses
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02:27Trihybrid Crosses
Trihybrid Crosses
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The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal chance to...
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