GH1促进体的结构变异调节了大米的体颜色
Chengxing Du1, Hao Wang1, Guangrong Zhong1
1State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Rice Research Institute, Sichuan Agricultural University, Chengdu, Sichuan China.
概括
研究人员确定了黄金1基因促进体的自然变异,导致黄金米. 这一发现为改善杂交大米种子生产和机械化效率提供了宝贵的遗传资源.
科学领域:
- 植物遗传学 植物遗传学
- 农业科学 农业科学
- 分子生物学分子生物学
背景情况:
- 体颜色对于高效的混合种子生产机械化至关重要.
- 对于船体颜色的有限遗传资源阻碍了实际的育种应用.
- 对自然变异的探索对于开发新品种至关重要.
研究的目的:
- 为了确定控制大米体颜色的遗传因素.
- 发现自然变异,以改善杂交大米育种.
- 评估已识别的变异在农业应用中的潜力.
主要方法:
- 全基因组关联研究 (GWAS) 在301个大米生殖质资源上.
- 与船体颜色相关的定量特征位置 (QTL) 的识别.
- 在Golden Hull 1 (GH1) 推广区的结构变异 (SV) 分析.
主要成果:
- 在染色体3上发现了一种显著的QTL,qHC3.2.
- 在GH1促进体中的7.3kb的结构变异抑制GH1的表达,导致金色的外.
- 确定了7个具有这种自然变异的生殖质资源.
- 引入GH1TM到U1S导致稳定的金色船体颜色,不受干燥的影响.
结论:
- 在GH1促进体中,一种新奇的自然变异是米中金色体表型的原因.
- 这种变异为专注于机械化混合米种子生产的育种计划提供了宝贵的遗传资源.
- 鉴定到的胚胎血资源可以用来开发具有理想体颜色特征的改进米品种.
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