相关实验视频
Updated: Jun 23, 2025
12:31
In Vivo Modeling of the Morbid Human Genome using Danio rerio
Published on: August 24, 2013
20.7K
研究笔记:肌素突变对日本长中脂肪积累的性二态效应
Dong-Hwan Kim1, Joonbum Lee1, Kichoon Lee1
1Department of Animal Sciences, The Ohio State University, Columbus, OH 43210, USA.
Poultry science
|June 23, 2024
概括
肌静素 (MSTN) 基因突变显著降低雌的脂肪沉积和脂肪细胞大小,但不是雄. 这种性二态性突出显示了MSTN的特点.
科学领域:
- 动物遗传学动物遗传学
- 禽畜科学 禽畜科学 禽畜科学
- 分子生物学分子生物学
背景情况:
- 肌静素 (MSTN) 基因被称为抗肌原因子,主要用作增强肉类生产的遗传标记物.
- MSTN突变在减少牲畜脂肪沉积方面表现出二次效应,这表明在家禽中对脂肪调节的潜在应用.
- 虽然MSTN突变乌由于增生而表现出增加的肌肉质量,但导致脂肪沉积减少的细胞机制仍未得到研究.
研究的目的:
- 为了研究MSTN基因突变和中的脂肪沉积之间的性二态关联.
- 分析MSTN突变对雄性和雌性的脂肪体重和脂肪细胞大小的组织学影响.
主要方法:
- 从4个月大的雄性和雌性的腹部和腿部脂肪的组织学分析.
- 根据性别分层的MSTN突变和野生类型之间的脂肪重量和脂肪细胞大小的比较.
主要成果:
- MSTN突变显著降低了腹部和腿部脂肪的重量,仅在雌性中.
- 组织学分析证实,雌的腿部和腹部脂肪的脂肪细胞大小显著减少.
- 在具有MSTN突变的雄中,没有观察到脂肪重量或脂肪细胞大小的显著变化.
结论:
- 该MSTN基因突变对中的脂肪沉积表现出性二态效应.
- 减少脂肪的重量和雌性的脂肪细胞缩是这项研究的关键发现.
- 这些结果为利用MSTN基因作为减少家禽物种脂肪沉积的遗传标记提供了关键的见解.
相关概念视频
02:41Lethal Alleles
15.4K
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...
15.4K
02:27Background and Environment Affect Phenotype
6.5K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.5K
02:50Dosage Compensation
6.2K
In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...
6.2K
02:45The Ratio of X Chromosome to Autosomes
8.5K
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
8.5K