相关实验视频
Updated: Jun 29, 2025

10:43
Dissection of Larval Zebrafish Gonadal Tissue
Published on: April 26, 2017
10.3K
Dmrt1是唯一一个被测试的男性通路基因,对于提拉皮亚的性别确定和功能性丸发育至关重要
Shuangshuang Qi1, Shengfei Dai1, Xin Zhou1
1Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, China.
PLoS genetics
|March 27, 2024
概括
在尼罗河鱼中,dmrt1对于男性的性别确定至关重要. 在dmrt1的突变阻止功能丸的发展,而其他男性通路基因可以通过女性通路基因突变来挽救.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 进行比较基因组学.
背景情况:
- 脊椎动物的性别决定涉及复杂的遗传相互作用.
- 像amhy,dmrt1,gsdf (雄) 和foxl2,foxl3,cyp19a1a (雌) 这样的关键基因与尼罗河鱼的性别决定有关.
- 这些性别决定基因之间的精确调节关系在很大程度上仍未被阐明.
研究的目的:
- 研究尼罗河鱼中已识别的男性和女性性别决定途径基因之间的功能关系.
- 确定特定基因对于功能性丸发育和性别确定是不可或缺的.
主要方法:
- 使用CRISPR/Cas9基因编辑来创建各种性别决定基因的双重和三重突变 (amhy,dmrt1,gsdf,foxl2,foxl3,cyp19a1a,cyp19a1b).
- 在转基因鱼中分析了生殖腺发育和细胞组成.
- 评估了突变系中关键的性别决定基因的表达和调节作用.
主要成果:
- dmrt1;cyp19a1a 双重突变者发展为卵巢或欠发育的丸缺乏生殖细胞,不论遗传性别.
- 雌性通路基因 (例如,foxl3;cyp19a1a) 的突变可能导致丸发育.
- 除了dmrt1 (amhy,gsdf) 之外的男性通路基因中的突变可以通过同时突变女性通路基因来挽救丸的发展,通常是通过dmrt1的上调.
- 在所有测试的女性路径基因突变中,dmrt1突变是表皮性,防止功能性丸发育.
结论:
- 在被测试者中,dmrt1是尼罗河鱼中功能性丸发育的唯一不可或缺的男性通路基因.
- 在鱼中性别决定的遗传层次结构将dmrt1作为一个关键的下游效应因子或主调节器.
- 了解这些基因相互作用,可以深入了解远程生物的性别决定机制的演变.
相关概念视频
The 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
Development of the Sexual Organs in the Embryo and Fetus
682
Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the...
682
The Y Chromosome Determines Maleness
6.6K
The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
6.6K

