相关实验视频
Updated: Jun 15, 2025
00:08
Analysis of Circadian Photoresponses in Drosophila Using Locomotor Activity
1.3K
日夜基因表达揭示了昼夜基因disco作为蝶中 diel-niche 进化的候选者
Yash Sondhi1,2,3, Rebeccah L Messcher1, Anthony J Bellantuono2
1McGuire Center for Lepidoptera and Biodiversity, Florida Museum of Natural History, University of Florida , Gainesville, FL 32611, USA.
Proceedings. Biological sciences
|August 28, 2024
概括
研究人员研究了白天和夜晚活跃的丝飞的基因表达,以了解时间利基变化如何驱动物种化. 基因迪斯科显示出潜在的潜力,作为这些独特的 diel-niches 进化的关键因素.
科学领域:
- 进化生物学 进化生物学
- 遗传学 是一个遗传学.
- 时间生物学 时间生物学
背景情况:
- 时间生态区分是物种化的一个关键驱动因素.
- 对于昆虫进化研究来说,了解 diel-niches (日常活动模式) 适应性变化的遗传基础至关重要.
研究的目的:
- 为了研究密切相关的白天和夜间活跃的野生丝飞之间的基因表达差异.
- 为了确定参与叶的多样化候选基因.
主要方法:
- 对比RNA测序 (RNA-Seq) 用于两种有着明显的 diel-niches 的野生丝物种.
- 一个基于ortolog的管道被用来分析差异性基因表达模式.
主要成果:
- 超过25对基因正统表现出白天和夜间活跃的之间的差异性表达.
- 基因迪斯科,以其在Drosophila的昼夜控制和神经发育中的作用而闻名,在头中显示出强大的昼夜mRNA循环.
- 迪斯科在中高度保存,并具有独特的指域,其中的突变可能与夜间和白天活动有关.
结论:
- 基因迪斯科被提议作为一个候选基因,负责蝶中叶的多样化.
- 这项研究强调了时分区在物种化中的重要性,并确定了需要进一步研究的特定基因.
相关概念视频
02:19Circadian Rhythms and Gene Regulation
4.0K
The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
4.0K
02:45Biological Clocks and Seasonal Responses
34.6K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.6K
02:32Position-effect Variegation
6.3K
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.
6.3K
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
01:47Osmoregulation in Insects
16.2K
Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
16.2K