在S-RNase中的替代拼接和删除在果品种"Vered"中赋予了笔状部分的自我兼容性
Kazuma Okada1, Taku Shimizu2, Shigeki Moriya2
1Institute of Fruit Tree and Tea Science, National Agriculture and Food Research Organization, 2-1 Fujimoto, Tsukuba, Ibaraki, 305-8605, Japan. okak@affrc.go.jp.
Plant molecular biology
|October 19, 2024
概括
研究人员在果品种"Vered"中发现了一种罕见的自我兼容性 (SC) 特性. 这种SC与S39sm-RNase基因的突变有关,使得可以开发DNA标记物来培育自我兼容的果品种.
科学领域:
- 植物遗传学 植物遗传学
- 分子生物学分子生物学
- 园艺园艺 园艺园艺
背景情况:
- 果 (Malus × domestica) 的自我不相容性 (SI) 需要交叉授粉以生产水果,使得自我相容性 (SC) 品种成为商业果园的理想选择.
- 了解SC的分子基础对于果育种至关重要,但仍然在很大程度上未被探索.
研究的目的:
- 识别和描述在果品种"Vered"的自然自我相容性背后的遗传和分子机制.
- 开发用于选择自我兼容的果品种的分子工具.
主要方法:
- 进行了自我授粉试验,以确认"Vered"的稳定自我兼容性.
- 对自我后代进行了基因分析,以将SC与特定的S-哈普类型联系起来.
- 包括测序在内的分子分析被用来识别对SC负责的S-RNase基因的突变.
主要成果:
- 果品种"Vered" (S基因型S24S39sm) 显示出稳定的自我相容性.
- 在"Vered"中自相容性归因于S39sm-haplotype,由S39sm-RNase中的替代拼接和205-bp删除引起.
- 这些突变导致有缺陷的S39sm-RNase异型缺少其C端半端.
- 一个117-bp的DNA标记物被开发用于识别果与功能障碍的S39sm-RNase.
结论:
- 这项研究阐明了果中罕见的笔形部分自我兼容性特征的分子机制.
- "Vered"作为一种有价值的遗传资源,用于培育自我兼容和低冷的果品种.
- 开发的DNA标记物促进了自我兼容的果品种的加速育种计划.
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