在双胞胎自体四虫Actinidia arguta中,与花量相关的特征的分子繁殖
Daniel Mertten1,2, Catherine M McKenzie3, Edwige J F Souleyre1
1The New Zealand Institute for Plant and Food Research Ltd, Auckland, 1142 New Zealand.
概括
研究人员使用定量特征位置 (QTL) 映射和基因组预测确定了影响 (Actinidia arguta) 花量的遗传因素. 这项工作有助于开发高产,低维护的双胞胎作物品种.
科学领域:
- 植物遗传学和育种.
- 园艺科学 园艺科学
- 植物生殖生物学 在植物生殖生物学.
背景情况:
- 大多数开花植物都是雌雄性,但像果 (Actinidia arguta) 这样的双胞胎物种有独立的雄性和雌性个体.
- 了解二元作物的产量特征的遗传基础对于高效的育种计划至关重要.
- 以前的育种努力往往集中在女性和男性基因型上,这可能会限制进步.
研究的目的:
- 为了研究女性和男性桃基因型中的花荷特征的遗传结构.
- 确定与花生产和生长习惯相关的定量特征位置 (QTL).
- 通过整合基因组数据和特征分析,开发一种用于双胞胎作物的新型育种工具.
主要方法:
- 花负荷特征的表型分析,包括非花芽的比例,花芽的比例,以及每个花芽中的花.
- 定量特征位置 (QTL) 地图绘制以确定控制花量的基因组区域.
- 基因组最佳线性无偏预测 (GBLUP) 用于预测繁殖值和选择优越的基因型.
主要成果:
- 与花负载特征相关的假定QTL在染色体3上被确定.
- 证据表明,Y染色体 (MSY) 在染色体3上对男性特异性区域的性效应会影响两性中的花量.
- 基于基因组数据,GBLUP成功实现了基于基因组数据的优质基因型的识别和选择.
结论:
- 这项研究阐明了Actinidia物种中开花和结果动态的遗传基础.
- 这些发现为寻求通过基因组方法提高产量的果育种计划提供了宝贵的见解.
- 介绍了一种结合QTL映射和基因组预测的新育种策略,用于双胞胎作物改进.
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