相关实验视频
Updated: Jul 29, 2026

08:41
Quantifying Abdominal Pigmentation in Drosophila melanogaster
Published on: June 1, 2017
一个基于BAC的Drosophila melanogaster主要自体的物理地图
R A Hoskins1, C R Nelson, B P Berman
1Berkeley Drosophila Genome Project, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. hoskins@bdgp.lbl.gov
概括
研究人员使用细菌人工染色体 (BACs) 创建了关键的Drosophila melanogaster染色体的物理地图. 这张地图有助于组装和验证果.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 染色体映射是指染色体的映射.
背景情况:
- 德洛索菲拉 (Drosophila melanogaster) 的基因组是基因研究的关键模型.
- 全面的物理地图对于精确的基因组测序和组装至关重要.
研究的目的:
- 为Drosophila melanogaster的染色体2和3构建一个基于细菌人工染色体 (BAC) 的物理地图.
- 将此地图与顺序标记站点 (STS) 和 euchromatic 区域的现场杂交数据集成.
- 利用地图和相关的序列数据来支持和验证全基因组序列组合.
主要方法:
- 细菌人造染色体 (BAC) 图书馆建设.
- 限制指纹和序列标记站点 (STS) 内容分析.
- 聚烯染色体在现场杂交用于物理映射.
主要成果:
- 为染色体2和3生成了一个物理地图,覆盖了Drosophila melanogaster基因组的81%.
- 地图涵盖了圣色区域,剩下的差距主要在重复丰富的中心色区域.
- 测序了BAC克隆的路径,并用于验证全基因组组件.
结论:
- 基于BAC的物理图为Drosophila melanogaster基因组测序提供了一个强大的框架.
- 综合映射方法成功地帮助了基因组组装验证和序列完成.
- 这项工作突显了物理映射在复杂的基因组项目中的实用性.
相关概念视频
Polytene Chromosomes
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also regularly...
The Ratio of X Chromosome to Autosomes
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...

