在玉米遗传学和基因组学数据库中增强泛基因组资源
Ethalinda K Cannon1, John L Portwood1, Rita K Hayford1
1USDA-ARS, Corn Insects and Crop Genetics Research Unit, Ames, IA 50011, USA.
Genetics
|April 5, 2024
概括
全基因组为玉米 (Zea mays) 等物种的遗传多样性提供了全面的观点. 现在MaizeGDB有一个泛基因数据中心,带有可视化工具来探索这些复杂的遗传数据.
科学领域:
- 基因组学就是基因组学.
- 生物信息学是一种生物信息学.
- 植物科学 植物科学
背景情况:
- 泛基因组代表了物种中完整的基因组,对于理解遗传多样性至关重要.
- 玉米 (Zea mays) 具有高度多样化和复杂的基因组,因此单个参考基因组不足以进行全面研究.
- 将广泛的基因数据与泛基因信息相结合,带来了重大挑战.
研究的目的:
- 描述MaiseGDB的扩展,包括Zea泛基因组的基因子集.
- 引入一个新的泛基因数据中心,用于探索玉米和teosinte基因组.
- 为研究人员提供分析复杂泛基因组数据的工具.
主要方法:
- 将Zea泛基因组的基因子集纳入MaiseGDB.
- 在MaizeGDB托管的玉米基因组和来自Pan-Andropoganeae项目的Zea基因组的整合.
- 浏览和可视化工具的开发,包括序列对齐和基因树,由Pandagma管道提供动力.
主要成果:
- 一个新的泛基因数据中心现在可在MaizeGDB.com上使用.
- 数据中心托管了玉米和theosinte基因组,其中包括一个基因泛基因组子集.
- 增强的可视化和浏览工具促进了泛基因的探索.
结论:
- 扩展的MaiseGDB有助于研究Zea的复杂性和多样性.
- 比较函数允许验证泛基因关系.
- 该资源支持对玉米遗传学和进化学的先进研究.
相关概念视频
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...
Genome Annotation and Assembly
The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
Genome-wide Association Studies-GWAS
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
Genome Size and the Evolution of New Genes
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.


