对泰国玉米生殖质中的Pl-1标志物表达和播种活力的交叉测试分析,用于双倍哈普洛伊德育种应用
Arnat Thawarorit1, Thomas Lübberstedt2, Abil Dermail1
1Department of Agronomy, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand.
Plants (Basel, Switzerland)
|October 16, 2025
概括
紫色植物1 (Pl-1) 标记在大多数泰国玉米中没有表达,证实了等位基缺失,而不是抑制. 这使得热带玉米能够高效地进行双倍平繁殖.
科学领域:
- 植物遗传学和育种.
- 玉米的遗传学 玉米的遗传学
- 分子标记物 分子标记物
背景情况:
- 双倍平分体 (DH) 技术通过快速创建同卵性线来显著加速作物改进.
- 有效的单 haploid 识别对于 DH 技术的成功至关重要.
- 紫色植物1 (Pl-1) 标记物是R1-nj的潜在替代品,R1-nj在热带玉米中经常被抑制.
研究的目的:
- 评估 Pl-1 根色素标记物在多种泰国玉米生殖质中的表达.
- 评估泰国玉米基因型中的苗木活力特征.
- 确定热带玉米中Pl-1非表达背后的机制 (基缺失与表现).
主要方法:
- 在受控条件下对298种泰国玉米基因型的Pl-1表达和幼苗活力的表型评估.
- 测试对89个泰国基因型的交叉分析,其中有一种来自温带地区的基因 (BHI306).
- 在幼苗活力特征中的遗传多样性的统计分析.
主要成果:
- 在99.3%的泰国玉米基因型中发现完全没有pl-1表达.
- 测试交叉后代显示了中间的pl-1表达,证实了等位基缺席.
- 在幼苗活力特征中观察到显著的遗传多样性,独立于pl-1状态.
结论:
- 泰国玉米中Pl-1表达的均缺乏简化了其作为标记物的使用,消除了背景干扰.
- Pl-1可以有效地用于用于热带玉米DH育种的标记器辅助逆交.
- 这项研究为优化热带玉米的DH育种策略提供了基础.
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