用MutMap QTL-seqq对与大米根系架构相关的区域进行遗传映射
Nakul D Magar1, Kalyani M Barbadikar2, Vishal Reddy2
1ICAR-Indian Institute of Rice Research, Hyderabad, 500030, India; Chaudhary Charan Singh University, Meerut, 250005, India.
Plant physiology and biochemistry : PPB
|June 28, 2024
概括
研究人员确定了与根长度和体积相关的中的关键基因组区域. 这一发现有助于培育具有较高营养使用效率的气候适应性大米品种.
科学领域:
- 植物遗传学 植物遗传学
- 农作物科学 农作物科学
- 农业学是一种农业学.
背景情况:
- 根系统架构 (RSA) 对营养和水的吸收至关重要,尤其是在不断变化的气候条件和土壤缺陷下.
- 开发具有强大的RSA的营养使用效率高的米品种对于全球粮食安全至关重要.
研究的目的:
- 为了绘制基因组区域控制根长度 (RL) 和根体积 (RV) 在大米.
- 为了确定候选基因负责增强的根特征在高性能突变的候选基因.
主要方法:
- 从高根特征EMS突变 (TI-128) 和其野生类型 (BPT-5204) 开发了一个双亲F2映射群体.
- 使用MutMap QTL-Seq方法对极端批量和父母进行全基因组重新测序.
- 使用竞争性等位基因特异性PCR (KASP) 试验用于SNP验证,在一个多样化的米基因型组.
主要成果:
- 在Chr.12和Chr.2上确定了两个显著的基因组间隔,与RL和RV相关.
- 已验证的特定KASP_SNP (Chr12_S4和Chr2_S6) 与较高的RL和RV相关.
- 在高根特征突变 (TI-128) 中发现了候选基因LOC_Os12g06670和LOC_Os2g38350的更高表达.
结论:
- 该研究成功地绘制了大米根特征的QTL,并确定了候选基因.
- 已识别的基因LOC_Os12g06670和LOC_Os2g38350在增强根的长度和体积方面发挥着功能性作用.
- 这些发现为改进的米品种与增强的根系的标记器辅助育种提供了基础.
相关概念视频
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01:18Dihybrid Crosses
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