相关实验视频

Updated: Jun 7, 2025

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

研究笔记:全基因组测序揭示了子保存种群中的基因组多样性动态

Yu-Ze Yang¹, Zhong-Tao Yin², Xiao-Ran Lin³

¹National Engineering Laboratory for Animal Breeding and MOA Key Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, China; Beijing General Station of Animal Husbandry, Beijing 100107, China.

Poultry science

|November 20, 2024

概括

北京的遗传多样性在五代人中仍然很高,有效的保护策略控制了近亲繁殖. 与野生祖先相比,化减少了整体的遗传多样性.

科学领域:

动物基因组学动物基因组学
保护遗传学保护遗传学
鸟类生物学鸟类生物学

背景情况:

北京是一种重要的家用水鸟物种.
了解遗传多样性对于有效的保护战略至关重要.
之前的研究还没有系统地评估子多代的基因组动态.

研究的目的:

为了全面分析北京的遗传多样性,在五代人的时间里保护了的种群.
评估目前对北京的保护战略的有效性.
为了比较保存的北京的遗传多样性与它们的野生祖先.

主要方法:

在277只佩金和40只马拉德的全基因组重新测序.
分析了超过740万个单核酸多态 (SNP).
计算异构性,遗传差异化 (FST) 和多态信息内容 (PIC).

主要成果:

观察到高水平的遗传多样性,预期和观察到的异构性超过0.3.3.
低基因差异化 (FST:0.007-0.039) 和高的PIC值 (0.29-0.34) 表示代际差异化最小.
亲生生殖系数受到严格控制,并没有迅速增加,尽管它仍然高于野生祖先,这表明由于化而减少了多样性.

结论:

目前的保护策略,包括自由交配和在父家族内随机保留种子,有效地保持了北京种群的遗传多样性.
与它们的野生祖先相比,化导致了北京的整体遗传多样性减少.
这项研究提供了使用全基因组再测序数据对子多代动态的首次系统基因组评估.

关键词:

保护战略保护战略保存的人口.一个的.遗传多样性遗传多样性

更多相关视频

Assessing Species-specific Contributions To Craniofacial Development Using Quail-duck Chimeras

Assessing Species-specific Contributions To Craniofacial Development Using Quail-duck Chimeras

Published on: May 31, 2014

Ultra-long Read Sequencing for Whole Genomic DNA Analysis

Ultra-long Read Sequencing for Whole Genomic DNA Analysis

Published on: March 15, 2019

相关概念视频

Multi-species Conserved Sequences

Multi-species Conserved Sequences

Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...

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...

Conservation of Small Populations

Conservation of Small Populations

Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...

Next-generation Sequencing

Next-generation Sequencing

The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....

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.

Genomics

Genomics

Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...