两种已解析的单元型基因组揭示了大叶黄兰花 (Hydrangea macrophylla) 中重要的花特征,并对星座的进化有了深入的了解
Xingbo Wu1,2, Sheron A Simpson3, Ramey C Youngblood4
1Department of Environmental Horticulture, Tropical Research and Education Center, University of Florida, Homestead, FL 33031, United States.
Horticulture research
|December 22, 2023
概括
研究人员为Hydrangea macrophylla开发了高质量的参考基因组,有助于基因改进和理解开花植物的进化. 这项工作确定了花朵形状和装饰性荷兰花的双花的关键基因.
科学领域:
- 植物基因组学 植物基因组学
- 开花植物的进化过程
- 装饰园艺 装饰园艺 装饰园艺
背景情况:
- 红枣属,特别是红枣大,在生育场贸易中具有经济重要性.
- 有限的基因组资源存在于Hortensia和相关的Asterid物种,阻碍了遗传研究和育种工作.
研究的目的:
- 组装和表征两种Hydrangea macrophylla品种的高质量,复原型解析的参考基因组.
- 利用这些基因组资源在Asterids clade内进行遗传学分析.
- 确定负责关键装饰性特征的基因,如花朵形状和花朵类型.
主要方法:
- 整基因组测序和组装两种黄大仙巨型植物品种 ("Veitchii"和"无休止的夏天").
- 结合体的架构成 18 个伪染色体.
- 用相关的开花植物的核数据进行植物遗传学分析.
- 在F1杂交种群中进行链接映射,以识别特征相关基因.
主要成果:
- 汇集了两个高质量的参考基因组 (2.22 Gb,396 contigs,N50 22.8 Mb) 的黄.
- 遗传学分析支持欧类中Cornales和Ericales的单一分歧点.
- 在染色体4上识别CYP78A5基因与花朵形状相关.
- 在染色体17上发现了一种新基因BAM3,与双花特征有关.
结论:
- 开发的参考基因组为加速花的遗传改进提供了至关重要的资源.
- 这些基因组资源增强了我们对Asterids内部进化关系的理解.
- 已识别的基因提供了在子中培育可取的装饰性特征的目标.
相关概念视频
02:54Evolutionary Relationships through Genome Comparisons
5.7K
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...
5.7K
02:19Morphogenesis
28.2K
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
28.2K
01:20Monohybrid Crosses
230.2K
Overview
230.2K
02:27Trihybrid Crosses
23.3K
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
23.3K
02:38Asexual Reproduction
31.4K
Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.
31.4K
01:18Dihybrid Crosses
74.9K
Overview
74.9K