粉内突变体 (wcr) (白芯米) 的表型分析和基因克隆
Yihao Yang1,2, Xiaoyi Yang1, Lingjun Wu1
1Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education, Agricultural College, Yangzhou University, Yangzhou 225009, China.
一种白芯大米 (wcr) 突变揭示了酸盐dikinase基因 (cyOsPPDKB) 对大米谷物质量至关重要. 这种突变影响粉代谢和储存蛋白质合成,影响谷物的外观和体重.
科学领域:
- 植物遗传学 植物遗传学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 米中的谷物质量取决于储存物质在内的组成和分布.
- 一种面粉内突变的白芯大米 (wcr) 显示了改变的谷物特征.
研究的目的:
- 调查WCR突变表型背后的遗传基础和分子机制.
- 了解受影响基因在米粒发育和质量的作用.
主要方法:
- 基因映射用于识别突变基因.
- 突变分析以描述遗传变化的特征.
- 基因表达分析以研究对代谢途径的调节效应.
主要成果:
- 由 cyOsPPDKB 基因的框架转移引起的 wcr 突变会导致面粉状的精子内分体,粒度减小.
- 突变大米表现出改变的粉特性 (减少胀,改变链条长度) 和减少储存蛋白质含量,在磨米大米中增加了白蛋白.
- 这种WCR突变影响了参与粉代谢和储存蛋白质合成的基因.
结论:
- 该cyOsPPDKB基因对于调节粉代谢和米粒中的蛋白质合成至关重要.
- 这种WCR突变提供了对大米内体发育和谷物质量的遗传控制的见解.
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