相关实验视频
Updated: Jan 12, 2026

09:40
Novel Sequence Discovery by Subtractive Genomics
Published on: January 25, 2019
9.1K
研究笔记:池测序提名MITF作为一个关键的候选基因为的白皮带羽毛
Xunhe Huang1, Yiqi Jiang1, Ningying Zheng1
1Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas, Guangdong Innovation Centre for Science and Technology of Wuhua Yellow Chicken, School of Life Sciences, Jiaying University, 514015 Meizhou, China.
Poultry science
|November 7, 2025
概括
研究人员确定了Microphthalmia相关的转录因子 (MITF) 基因是导致黄独特的白带羽毛图案的主要原因. 这一发现有助于我们对鸟类遗传学和区域性脱色的理解.
科学领域:
- 遗传学 是一个遗传学.
- 动物科学动物科学
- 发展生物学 发展生物学
背景情况:
- 一种罕见的武华黄色的变种显示出明显的白带羽毛.
- 这种类型为研究鸟类区域色素遗传学提供了一个模型.
研究的目的:
- 为了确定黄的白带羽毛表型的遗传基础.
- 了解候选基因在区域脱色和羽毛图案中的作用.
主要方法:
- 从70只公 (35只棕腰带,35只白腰带) 的DNA进行了池测序.
- 高深度测序 (平均52×覆盖) 以确定候选基因.
- 对等位基频率的综合分析,费舍尔的精确测试和人口差异化.
主要成果:
- 确定了49个共享候选基因,其中23个位于12号染色体上的3.83Mb区域.
- MITF和相邻的基因显示出强烈的选择信号.
- 功能性丰富分析将MITF与黑色素细胞分化和黑色素生成途径联系起来.
结论:
- 建议MITF作为白带表型的主要遗传调节者.
- 其他基因,如PRICKLE2,可能会改变表型.
- 这项研究提供了关于鸟类羽毛遗传学的见解,以及MITF在色素模式中的作用.
相关概念视频
Complementation Tests
6.0K
A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
6.0K
Position-effect Variegation
7.0K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
7.0K
Cis-regulatory Sequences
11.6K
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
11.6K
Epistasis
50.0K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
50.0K

