Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Phylogenetic Trees03:21

Phylogenetic Trees

46.4K
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.
46.4K
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

6.1K
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...
6.1K
Phylogeny01:23

Phylogeny

46.9K
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.
46.9K
Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

7.4K
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...
7.4K
Survival Tree01:19

Survival Tree

159
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
 Building a Survival Tree
Constructing a...
159
The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

33.7K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
33.7K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Speciation History Shapes Patterns of Assemblage Species Richness in Birds.

Ecology letters·2026
Same author

Predicting health-related quality of life two years post-diagnosis across seven cancer types: using machine learning to identify vulnerable patients.

Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation·2026
Same author

The marginal male hypothesis explains only small amounts of spatial variation in density in pinnipeds.

Scientific reports·2026
Same author

Recent and Rapid Assembly of an Island Species-Area Relationship Threatened by Human Disturbance.

Ecology letters·2025
Same author

Quantifying the effects of intraspecific trait variation and interspecific trait correlations on interacting populations-A nonlinear averaging approach.

Journal of theoretical biology·2025
Same author

Habitat openness and squamate color evolution over deep time.

Nature communications·2025
Same journal

Diversification dynamics in the global radiation of gobies.

Systematic biology·2026
Same journal

Correction to: nQMaker: Estimating Time Nonreversible Amino Acid Substitution Models.

Systematic biology·2026
Same journal

Phylogenomic challenges in polyploid-rich lineages: Insights from paralog processing and reticulation methods using the complex genus Packera (Asteraceae: Senecioneae).

Systematic biology·2026
Same journal

An evolving view of phylogenetic biogeography.

Systematic biology·2026
Same journal

Modeling Site-and-Branch-Heterogeneity with GFmix.

Systematic biology·2026
Same journal

Coalescent-based branch length estimation improves dating of species trees.

Systematic biology·2026
Ver todos los artículos relacionados

Video Experimental Relacionado

Updated: Sep 9, 2025

A Practical Guide to Phylogenetics for Nonexperts
12:00

A Practical Guide to Phylogenetics for Nonexperts

Published on: February 5, 2014

35.5K

Estimación de parámetros de árboles filogenéticos utilizando redes neuronales y aprendizaje en conjunto

Tianjian Qin1, Koen J van Benthem1, Luis Valente1,2

  • 1Groningen Institute for Evolutionary Life Sciences, University of Groningen, Nijenborgh 7, Groningen, 9747 AG, The Netherlands.

Systematic biology
|September 3, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio introduce una red neuronal de conjunto para estimar las tasas de diversificación de especies a partir de árboles filogenéticos, ofreciendo una alternativa más rápida y menos sesgada a la estimación de probabilidad máxima (MLE) para muchos escenarios.

Palabras clave:
red neuronal gráficaAprendizaje automáticored neuronal recurrenteregresión

Más Videos Relacionados

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

16.0K
Amplification of Near Full-length HIV-1 Proviruses for Next-Generation Sequencing
10:18

Amplification of Near Full-length HIV-1 Proviruses for Next-Generation Sequencing

Published on: October 16, 2018

12.3K

Videos de Experimentos Relacionados

Last Updated: Sep 9, 2025

A Practical Guide to Phylogenetics for Nonexperts
12:00

A Practical Guide to Phylogenetics for Nonexperts

Published on: February 5, 2014

35.5K
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

16.0K
Amplification of Near Full-length HIV-1 Proviruses for Next-Generation Sequencing
10:18

Amplification of Near Full-length HIV-1 Proviruses for Next-Generation Sequencing

Published on: October 16, 2018

12.3K

Área de la Ciencia:

  • Biología evolutiva
  • Biología computacional
  • Filogenética

Sus antecedentes:

  • La diversificación de las especies es impulsada por la especiación y la extinción.
  • Estimar estas tasas de filogenias es crucial pero desafiante.
  • Los métodos actuales de estimación de probabilidad máxima (MLE) tienen limitaciones con modelos complejos y filogenias pequeñas.

Objetivo del estudio:

  • Desarrollar y evaluar un nuevo enfoque de red neuronal de conjunto para estimar los parámetros de diversificación de los árboles filogenéticos.
  • Comparar el rendimiento del método de red neuronal con el MLE y los enfoques de aprendizaje profundo existentes.
  • Evaluar la solidez de los métodos de redes neuronales en el manejo de datos filogenéticos.

Principales métodos:

  • Se desarrolló una red neuronal de conjunto que combina redes neuronales densas, redes neuronales de gráficos y redes neuronales recurrentes.
  • La red aprende de las representaciones gráficas, los tiempos de ramificación y las estadísticas resumidas de las filogenias.
  • El rendimiento se evaluó en comparación con el MLE y un enfoque de red convolucional utilizando datos filogenéticos simulados.

Principales resultados:

  • La red neuronal de conjunto proporciona estimaciones más rápidas que MLE y es menos sensible al tamaño del árbol para modelos de tasa constante y dependientes de la diversidad.
  • Tiene un rendimiento comparable al de los métodos de redes convolucionales existentes.
  • Tanto el enfoque de la red neuronal como el MLE luchan con la recuperación de parámetros bajo procesos prolongados de nacimiento-muerte.

Conclusiones:

  • La red neuronal de conjunto es una alternativa prometedora, más rápida y menos sesgada a MLE para estimar los parámetros de diversificación, especialmente cuando MLE no es factible.
  • El tamaño de la filogenia y la fuerza de las señales evolutivas son limitaciones clave para una estimación precisa de los parámetros.
  • El método muestra un buen rendimiento cuando hay una señal filogenética suficiente.