相关实验视频

Updated: Sep 10, 2025

Mass Isolation and In Vitro Cultivation of Intramolluscan Stages of the Human Blood Fluke Schistosoma Mansoni

Mass Isolation and In Vitro Cultivation of Intramolluscan Stages of the Human Blood Fluke Schistosoma Mansoni

Published on: January 14, 2018

在许多实验室体群体中保留了丰富的遗传变异

Kathrin S Jutzeler^1,2, Roy N Platt³, Robbie Diaz¹

¹Host Parasite Interaction Program, Texas Biomedical Research Institute, San Antonio, Texas, United States of America.

|August 20, 2025

概括

尽管在实验室中进行了近亲繁殖,但仍然保留了显著的遗传变异,这为研究提供了新的机会. 这种遗传多样性对表型测量产生影响,并使瘤研究中的全基因组关联研究成为可能.

科学领域:

基因组学
寄生虫学
进化生物学

背景情况:

螺旋体是有义务的性寄生虫,具有复杂的生命周期,涉及牛和动物宿主.
实验室维护的分裂体种群中的遗传多样性在很大程度上是未知的,因近亲繁殖而有可能被清除.
了解遗传变异对于精确的表型评估和体遗传研究至关重要.

研究的目的:

在实验室维护的 Schistosoma mansoni 种群中调查基因组变异.
为了比较实验室和野生虫群体之间的遗传多样性和变异模式.
评估实验室石体的遗传变异对未来研究的影响.

主要方法:

来自五个实验室S. mansoni种群的个体寄生虫的全基因组测序.
将基因组数据与四个野生S. mansoni种群的已公布的外体数据进行比较.
核酸多样性的分析,塔吉马的D,有效的种群大小和链接不平衡.

主要成果:

在实验室中发现了大量的基因组变异,发现了数百万种变异.
与野生种群相比,实验室种群的核酸多样性明显较低.
在实验室种群中观察到明显的变异模式,包括阳性Tajima的D和有效种群大小的减少,这表明瓶,而野生种群显示阴性Tajima的D.

结论:

大多数实验室分裂体种群保留了大量的遗传变异,这与通过近亲繁殖清除的预期相反.
这种保留变异对解释表型数据 (例如药物耐药性) 和在实验室环境中进行全基因组关联研究 (GWAS) 有关重要意义.
在不同实验室中,基因漂移可能会导致分裂体种群的分歧,强调需要仔细管理种群,并提供独特的研究途径.

更多相关视频

Cercarial Transformation and in vitro Cultivation of Schistosoma mansoni Schistosomules

Cercarial Transformation and in vitro Cultivation of Schistosoma mansoni Schistosomules

Published on: August 16, 2011

Protocol for Production of a Genetic Cross of the Rodent Malaria Parasites

Protocol for Production of a Genetic Cross of the Rodent Malaria Parasites

Published on: January 3, 2011

相关概念视频

Mutation, Gene Flow, and Genetic Drift

Mutation, Gene Flow, and Genetic Drift

In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).

Genetic Variation

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...

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.

What is Population Genetics?

What is Population Genetics?

A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.