一个悬空的基因组序列,Cheilosia grossa (法伦,1817年) 的基因组序列
Ryan Mitchell1, Steven Falk2, Katie J Woodcock3
1Independent researcher, Sligo, County Sligo, Ireland.
Wellcome open research
|November 20, 2024
概括
我们向您介绍了飞,Cheilosia grossa.的基因组组合. 这项研究详细介绍了这一重要昆虫物种的基因组大小,染色体结构和基因含量.
科学领域:
- 基因组学就是基因组学.
- 昆虫学 昆虫学是一门学科.
- 生物信息学是一种生物信息学.
背景情况:
- 飞 (Syrphidae) 是一种具有生态意义的昆虫.
- 基因组测序为昆虫生物学和进化提供了洞察力.
研究的目的:
- 为了呈现Cheilosia grossa.的高质量基因组组合.
- 为了描述这种悬浮物种的基因组特征.
主要方法:
- 一个单独的雄性Cheilosia grossa.的全基因组测序.
- 基因组的基因架成染色体伪分子.
- 线粒体基因组组装和基因注释使用Ensembl.
主要成果:
- 产生了一个由362.40兆基的基因组组合.
- 该组件包括6种染色体伪分子和X染色体.
- 线粒体基因组是17.81千基基,有20,196个蛋白质编码基因被注释.
结论:
- 这种基因组组合为Cheilosia grossa研究提供了宝贵的资源.
- 标志性基因组特征为飞进化和生物学提供了洞察力.
相关概念视频
Genetic Lingo
Overview
Position-effect Variegation
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.
Lampbrush Chromosomes
In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops resemble the...
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops resemble the...
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
Synteny and Evolution
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...
Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...


