泛基因结构变异模式反映了Brassica napus中的进化多样化.
Nazanin P Afsharyan1,2, Agnieszka A Golicz3, Rod J Snowdon4
1Department of Plant Breeding, Justus Liebig University Giessen, Giessen, 35392, Germany. Nazanin.PesaranAfsharyan@zalf.de.
Genome biology
|November 11, 2025
概括
基因组结构变异 (SVs) 推动了Brassica napus的多样化. 这项研究揭示了泛基因 SV 模式,突出了它们在作物进化中的作用,并为培育改进的 Brassica 作物提供了洞察力.
科学领域:
- 基因组学就是基因组学.
- 植物生物学 植物生物学
- 进化生物学 进化生物学
背景情况:
- 遗传多样性是提高作物生产率的关键.
- 布拉西卡纳普斯 (Brassica napus) 是一个具有全球重要性的全聚多类作物,具有显著的物种内和生态地理多样化.
- 了解基因组结构变异 (SV) 对作物改进至关重要.
研究的目的:
- 为了探索全物种基因组结构变异 (SV) 在Brassica napus.
- 研究 SVs 在物种内和生态地理多样化中的作用.
- 识别 SV 模式及其对作物育种的功能相关性.
主要方法:
- 94个Brassica napus加入的全基因组长读DNA测序.
- 以参考指导的基因组组件的构建.
- 对SVs的泛基因分析,包括插入,删除,反转和大的染色体变异.
主要成果:
- 识别了泛基因组范围内的SV模式 (插入,删除,反转,大染色体变异),反映了形态型和生态型的多样化.
- SV分布不均,偏向亚基因组A,不对称的选择有利于亚基因组C.
- 特定的SV和逆转与参与器官发育,细胞分裂和应激反应的基因有关,区分作物类型,如瑞典和油.
结论:
- 泛基因 SV 形成在 Brassica napus 多样化中发挥着重要的功能和进化作用.
- 识别的SV模式为开发Brassica育种中的分子标记提供了洞察力.
- 这项研究有助于优化Brassica napus和相关作物的表现.
相关概念视频
02:26Comparing Copy Number Variations and SNPs
18.5K
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
18.5K
01:05Single Nucleotide Polymorphisms-SNPs
17.9K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
17.9K
02:54Evolutionary Relationships through Genome Comparisons
6.8K
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...
6.8K
02:02Cis-regulatory Sequences
11.6K
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...
11.6K
02:13Overview of Transposition and Recombination
18.7K
Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
18.7K
03:21Genome Size and the Evolution of New Genes
9.0K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
9.0K