基因组扫描提供了证据,可以接受从Peucedanum s.l.中分离的两个新属 (Apiaceae)
Bo-Ni Song1, Chang-Kun Liu1,2, Jiao-Jiao Deng1
1Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China.
Frontiers in plant science
|February 4, 2025
概括
这项研究修订了多种植物的Peucedanum s.l. 根据分子和形态学数据,建立了两个新的属,Shanopeucedanum和Sinopeucedanum. 这些发现澄清了这些重要的药用植物的分类学,这些药用植物属于阿皮叶科 (Apiaceae) 家族.
科学领域:
- 植物学 植物学
- 植物分类学 植物分类学
- 分子遗传学分子遗传学
背景情况:
- 这种植物属是Peucedanum s.l. 是Apioideae亚家族的关键组成部分,包括许多植物,对医药和经济应用至关重要.
- 尽管先前进行了分类学修订,但许多Peucedanum s.l.的分类仍然存在. 种群,特别是中国特有种类,由于其多种类的性质,仍然未解决.
研究的目的:
- 进行一个全面的分类学修订的多种类的Peucedanum s.l. 一个属. 一个属.
- 建立一个可靠的遗传学框架,并研究特有种类的分歧时间.
主要方法:
- 使用了两个分子数据集:103个塑体和43个通过基因组脱皮获得的核核糖体DNA (nrDNA) 序列.
- 重建了具有高支和分辨率的遗传树.
- 调查了特有种类的核心类的分歧时间.
主要成果:
- 遗传学分析证实了Peucedanum s.l. 的存在. 不是单一的,P. morisonii与其他成员有着遥远的关系.
- 在前Peucedanum s.l.中确定了两种不同的单种类 (Clade A和Clade B). 基于塑系的基因.
- 建立了两种新属,Shanopeucedanum gen. nov. 和Sinopeucedanum gen. nov.,以适应分别来自Clade A和Clade B的种类,由不同的形态,塑体和染色体特征支持.
- 分子年代测定表明,在世早期的A类和在世晚期的B类的多样化.
结论:
- 这项研究解决了Peucedanum s.l.中的分类学不确定性. 复杂,导致新世代的建立.
- 这些发现有助于建立一个更准确的分类系统,为Apiaceae家族.
- 这些克拉德的多样化可能与普世和普世时期的地质和气候变化有关.
相关概念视频
02:16Genetics of Speciation
19.0K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
19.0K
03:21Genome Size and the Evolution of New Genes
7.8K
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.
7.8K
02:05Gene Evolution - Fast or Slow?
7.0K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.0K
01:31Formation of Species
38.9K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
38.9K
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
02:29Hybrid Zones
16.8K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
16.8K