使用CRI-SPA-Map进行高分辨率,无基因型的基因变异映射
Sheila Lutz1, Megan Lawler1, Samuel Amidon1
1Department of Genetics, Cell Biology, & Development, University of Minnesota, Minneapolis, MN 55455, USA.
bioRxiv : the preprint server for biology
|September 26, 2025
概括
我们开发了CRI-SPA-Map,这是一种使用CRISPR-Cas9和酵母中的选择性性切除 (SPA) 的经济有效的基因绘图策略. 这种方法精确地识别出影响酵母生长和基因与环境相互作用的基因变异,如MKT1和SAL1中的基因变异.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 分子生物学分子生物学
- 酵母生物学的酵母生物学
背景情况:
- 鉴定表型变异的基因变异是至关重要的,但具有挑战性.
- 现有的基因测绘方法可能昂贵且耗时.
- 了解基因功能和相互作用需要精确的遗传工具.
研究的目的:
- 引入CRI-SPA-Map,这是一个新的基因绘图策略,用于精确识别酵母菌中的变异.
- 为了证明CRI-SPA-Map的成本效益和高分辨率能力.
- 确定因果遗传变异并分析它们与环境的相互作用.
主要方法:
- CRI-SPA-Map 结合了 CRISPR-Cas9 基因组工程,选择性性切除 (SPA) 和高通量表型.
- 使用SPA机器将捐赠菌株与使用可选择磁带的受体菌株配对.
- 克里斯普尔-Cas9促进了DNA的替代,其次是SPA,以产生单 haploid 重组菌株.
主要成果:
- 产生了1451个复合酵母分离物,具有精细复合的映射种群.
- 确定了影响酵母生长的6.5kb区域,确定了MKT1和SAL1.1中的因果变异.
- 揭示了基因与环境之间的相互作用和依赖环境条件的表观相互作用.
结论:
- CRI-SPA-Map提供了一个具有成本效益的方法,用于创建高分辨率的酵母菌株面板.
- 该策略可以准确识别表型变异的遗传基础.
- 发现了影响酵母表型的复杂基因环境和表观相互作用.
相关概念视频
Single Nucleotide Polymorphisms-SNPs
17.9K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
17.9K
Comparing Copy Number Variations and SNPs
18.6K
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
18.6K
Genome-wide Association Studies-GWAS
15.3K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
15.3K


