两个玉米杂交系的染色体级基因组组合,具有对比的植物结构
Wen Yao1,2, Songyang Li2, Jifei Ren1
1State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping, College of Agronomy, Henan Agricultural University, Zhengzhou, 450046, China.
Scientific data
|January 19, 2026
概括
两种有着不同的植物结构的玉米品种的基因组测序提供了有价值的数据. 这项研究有助于了解玉米的植物结构,并改善作物育种以获得更高的产量.
科学领域:
- 植物遗传学 植物遗传学
- 基因组学就是基因组学.
- 农业科学 农业科学
背景情况:
- 玉米是全球重要的粮食来源.
- 增加种植密度是提高玉米产量的关键.
- 优化植物架构对于高密度种植至关重要.
研究的目的:
- 为两种不同植物架构的玉米杂交系 (D132和Yu82) 提供基因组组件.
- 为了解玉米植物结构的遗传基础提供资源.
主要方法:
- 利用先进的测序技术进行基因组组装.
- 组装了D132和Yu82玉米杂交系的基因组.
主要成果:
- 产生了2,166.50 Mb (D132) 和2,193.33 Mb (Yu82) 的基因组组件.
- 在D132中确定了40,951个蛋白质编码基因,在Yu82中确定了40,935个.
- 在这两条杂交系中,特征是两种不同的植物结构.
结论:
- 基因组数据是玉米遗传研究的宝贵资源.
- 这些发现可以有助于改善玉米育种,以提高产量和高密度种植.
相关概念视频
Chromosome Replication
10.5K
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin...
10.5K
Genome Annotation and Assembly
20.6K
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.
20.6K
Plant Breeding and Biotechnology
21.5K
Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
21.5K
Lampbrush Chromosomes
8.6K
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...
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...
8.6K
Chromosomal Theory of Inheritance
59.7K
In 1866, Gregor Mendel published the results of his pea plant breeding experiments, providing evidence for predictable patterns in the inheritance of physical characteristics. The significance of his findings was not immediately recognized. In fact, the existence of genes was unknown at the time. Mendel referred to hereditary units as “factors.”
59.7K
Polytene Chromosomes
10.9K
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...
10.9K


