种子大小的分子标记使用MITE标记在一个诱导的大种子突变的花生细胞大小更高的花生细胞大小
Poonam Gajanan Bhad1,2, Suvendu Mondal1,2, Anand M Badigannavar1,2
1Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, 400085 India.
3 Biotech
|February 1, 2024
概括
研究人员在链接组A05上确定了一个主要的定量特征位点 (QTL),与突变的种子大小相关. 这一发现与BIG SEEDS 1基因相关,为在作物育种中使用标记器辅助选择提供了潜力.
科学领域:
- 植物遗传学 植物遗传学
- 农业学是一种农业学.
- 分子生物学分子生物学
背景情况:
- 一种大型种子突变 (TG 89) 通过电子束突变生成,百核重量增加了76.7%.
- 环境扫描电子显微镜揭示了突变者的种子细胞的细胞大小,与其父细胞相比 (TG 26).
研究的目的:
- 绘制TG 89突变体中与大种子特征相关的定量特征位置 (QTL).
- 识别导致种子大小增加的遗传标记和基因.
主要方法:
- 从突变种和正常基因型之间的交叉中创建了122种F2植物的映射群.
- 批量分离分析和用多态标记物的基因定型被用来识别QTLs.
- 实时PCR被用于分析BIG SEEDS 1正义基因表达.
主要成果:
- 在链接组A05上确定了大种子大小的主要添加剂QTL,解释了12.7%的表型变异.
- 这种QTL位于 AhTE333和 AhTE810标记物之间,包含了BIG SEEDS 1基因的正义基因.
- 突变体中BIG SEEDS 1基因的下调表明功能丧失突变导致大种子表型.
- 在先进的繁殖系中验证时,QTL表现出高选择精度 (90.9%).
结论:
- 与增加种子大小相关的显著QTL已被映射和验证.
- 大种子1基因是大种子特征的强有力的候选者,为标记器辅助育种提供了潜力.
- 这项研究为开发具有增强种子特性的改良作物品种提供了基础.
关键词:
阿拉基斯·希波盖亚 (Arachis hypogaea) 是一个低气质的动物.细胞大小 细胞大小大型种子突变种子链接地图 链接地图定量性特征位置 (loci loci) 是一个定量性特征位置.更多相关视频
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