在OsABCI8中发生的自发突变导致了一种由移植诱导的白色大米突变
Kyu-Chan Shim1, Yun-A Jeon2, Hyun-Sook Lee2,3
1Department of Crop Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, 34134, Republic of Korea. kcshim@cnu.ac.kr.
Scientific reports
|July 27, 2025
概括
自发突变导致了大米的条件白化表型. 染色体11上的OsABCI8基因的1-bp删除被确定为可能的原因,影响蛋白质结构和功能.
科学领域:
- 植物遗传学 植物遗传学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 自发突变是植物进化的关键驱动力.
- 了解表型变异的遗传基础是提高作物的关键.
- 米 (Oryza sativa) 是全球重要的粮食作物,其遗传多样性对于适应至关重要.
研究的目的:
- 在大米中识别和描述条件白化表型的遗传原因.
- 研究自发突变在产生新型特征中的作用.
- 探索基因组不稳定性和植物发育之间的关系.
主要方法:
- QTL-seq分析以确定与白化表型相关的主要遗传位置.
- 全基因组测序以检测F2种群中的自发变异.
- 蛋白质结构建模以评估突变对蛋白质功能的影响.
主要成果:
- 在440个F2大米植物中,在10个大米植物中观察到有条件的白化表型.
- 一个主要的定量特征位置 (QTL),qALB11,被映射到染色体11.
- 在OsABCI8基因 (Os11g0490800) 中的1-bp删除被确定为最可能的因果突变,导致截断的蛋白质.
- 全基因组查发现了669个自发变异,其中许多与重复序列有关.
结论:
- 这项研究阐明了与OsABCI8.8突变相关的米条件性白化表型的遗传基础.
- 自发突变和基因组不稳定性有助于的表型变异和潜在的环境应激适应.
- 这些发现提供了关于突变在植物发育和适应过程中的进化作用的见解.
相关概念视频
01:30Spontaneous and Induced Mutations
152
Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).
152
02:41Lethal Alleles
15.7K
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
15.7K