放大番茄产量的定量特征,使用跨物种内向变化
Eyal Fridman1, Fernando Carrari, Yong-Sheng Liu
1Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agriculture, Hebrew University of Jerusalem, Post Office Box 12, Rehovot 76100, Israel.
Science (New York, N.Y.)
|September 18, 2004
概括
野生番茄的亲属增加了种植番茄的糖产量. 野生番茄入侵线 (ILs) 中的一种特定基因 (Brix9-2-5) 通过改变逆转酶活性来增加糖含量,从而改善水果质量.
科学领域:
- 植物遗传学 植物遗传学
- 提高作物质量 提高作物质量
- 生物多样性 生物多样性
背景情况:
- 种植的西红 (S. lycopersicum) 是一个重要的作物.
- 探索野生亲属 (Solanum pennellii) 提供了改善作物的遗传资源.
- 内进线 (IL) 是研究野生物种特征的关键工具.
研究的目的:
- 研究自然生物多样性,以增强种植番茄的特征.
- 确定导致番茄糖产量增加的遗传因素.
- 了解野生亲属改善水果质量的分子基础.
主要方法:
- 使用Solanum pennellii细分的内进线 (IL) 的开发和分析.
- 在五种番茄物种中进行定量特征位置 (QTL) 分析.
- 酶动力学和基因映射以精确确定功能多态.
主要成果:
- 鉴定了Brix9-2-5,一种Solanum pennellii QTL,显著增加了番茄糖的产量.
- 布里克斯9-2-5 QTL被映射到LIN5基因中,编码一种鲜花和水果特异性的反转酶.
- 在逆转酶催化位点附近的一种特定的氨基酸多态性影响了酶动力学和水果沉降强度.
结论:
- 多种内进线 (IL) 提供了对复杂植物表型的高分辨率洞察.
- 从野生番茄亲属的遗传变异可以有效地利用,以改善作物质量特征.
- 通过基因操纵准逆转酶活性提供了一种提高番茄糖产量的策略.
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