Video Experimental Relacionado
Updated: Feb 24, 2026
08:57
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
Published on: August 14, 2018
16.6K
Análisis del conflicto mitogenómico para iluminar la filogenia profunda de las angiospermas: Evidencia de secuencia y
Liyun Nie1,2,3, Jie Wang1,2,3, Lei Huang4
1Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Synthetic Biology, Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518020, China.
Plant diversity
|February 23, 2026
Resumen
Resolución de la filogenia profunda de las angiospermas, este estudio introduce PhyloForensics para identificar la inestabilidad filogenética. La eliminación de genes en conflicto y el análisis de la arquitectura del mitogenoma aclaran las relaciones evolutivas.
Área de la Ciencia:
- Biología Evolutiva
- Genómica
- Filogenética
Sus antecedentes:
- Las relaciones profundas dentro del árbol de la vida de las angiospermas son muy debatidas.
- Las señales filogenéticas conflictivas surgen de los genomas nuclear, del plastidio y mitocondrial.
Objetivo del estudio:
- Resolver la controvertida filogenia de nivel profundo de las angiospermas.
- Desarrollar un marco para identificar y resolver la inestabilidad filogenética.
- Investigar el papel de la arquitectura del mitogenoma en la señal filogenética.
Principales métodos:
- Ensamblaje de genomas mitocondriales completos para *Ceratophyllum demersum* y *Chloranthus sessilifolius*.
- Desarrollo y aplicación del marco 'PhyloForensics' para diagnosticar la inestabilidad filogenética.
- Análisis de la heterogeneidad de la señal, el contenido de información y la arquitectura del mitogenoma.
Principales resultados:
- Se confirmó una relación hermana bien respaldada entre *C. demersum* y *C. sessilifolius*, en conflicto con otros datos.
- PhyloForensics identificó la heterogeneidad de la señal y el contenido de información como impulsores clave del conflicto gen-árbol.
- La eliminación de genes 'fuertemente en conflicto' resolvió la incongruencia, revelando una topología estable.
- La arquitectura del mitogenoma proporcionó señales filogenéticas significativas, mostrando correlaciones entre la longitud de la rama, el contenido de GC y los sitios de edición de ARN.
Conclusiones:
- El marco PhyloForensics resuelve eficazmente la incongruencia filogenética de nivel profundo.
- La arquitectura del mitogenoma ofrece valiosas perspectivas filogenéticas.
- Este enfoque integrado proporciona una estrategia robusta para reconstruir historias evolutivas complejas.
Videos de Conceptos Relacionados
02:54Evolutionary Relationships through Genome Comparisons
7.1K
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...
7.1K
02:16Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
17.1K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
17.1K
02:05Gene Evolution - Fast or Slow?
8.3K
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...
8.3K
02:31Synteny and Evolution
3.9K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.9K
03:21Phylogenetic Trees
50.3K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
50.3K
01:23Phylogeny
63.3K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
63.3K