相关实验视频

Updated: Apr 30, 2026

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks

Published on: May 13, 2016

三条刺鱼物种之间的分歧的遗传结构

C L Peichel¹, K S Nereng, K A Ohgi

¹Department of Developmental Biology and Howard Hughes Medical Institute, Stanford University, Stanford, California 94305-5329, USA.

|January 10, 2002

概括

研究人员绘制了三脊鱼的基因组图,以了解遗传变化如何推动快速进化. 这项研究揭示了这种脊椎动物模型中独立的遗传因素控制着不同的形态特征.

科学领域:

进化生物学是进化的生物学.
遗传学是一个遗传学.
动物学动物学

背景情况:

由于遗传研究的局限性和缺乏分子地图,了解脊椎动物形态进化的遗传基础具有挑战性.
三脊鱼 (Gasterosteus aculeatus) 是一个遥远的鱼类模型,经历了快速分歧和物种化.
以前的研究受到野生种群研究的困难和遗传资源的有限可用性所阻碍.

研究的目的:

开发一个全基因组链接地图,为三脊.
分析骨盔甲和养器官最近演变的形态变化的遗传基础.
为了确定与快速形态多样化相关的染色体区域.

主要方法:

开发一个全基因组链接地图Gasterosteus aculeatus.
对控制骨盔甲 (脊柱长度,盔甲板号码) 和食形态 (切器号码) 的遗传因素的分析.
绘制与这些特征相关的定量特征位点 (QTL) 在底和底鱼物种的映射.

主要成果:

一个全基因组的链接地图为三脊鱼成功构建.
确定了控制脊柱长度,甲板号和牙数的显著遗传因素.
这些与特征相关的遗传因素被定位到独立的染色体区域,表明了不同的遗传基础.

结论:

这项研究提供了宝贵的基因地图为三脊,促进未来的研究脊椎动物进化.
鱼的形态多样化是由位于单独的染色体区域的遗传变化驱动的.
对这些已识别的区域的进一步研究将揭示脊椎动物形态演化的遗传机制.

更多相关视频

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

Published on: May 7, 2016

Genome Editing in Astyanax mexicanus Using Transcription Activator-like Effector Nucleases TALENs

Genome Editing in Astyanax mexicanus Using Transcription Activator-like Effector Nucleases TALENs

Published on: June 20, 2016

相关概念视频

Fixed Action Patterns

Fixed Action Patterns

A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.

Speciation Rates

Speciation Rates

Genetics of Speciation

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.

Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

Convergent Evolution

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.

Evolutionary Relationships through Genome Comparisons

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...