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Updated: Jun 1, 2026

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Dating phylogenetically basal eudicots using rbcL sequences and multiple fossil reference points.

Cajsa Lisa Anderson¹, Kåre Bremer, Else Marie Friis

¹Department of Systematic Botany, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36 Uppsala, Sweden;

American Journal of Botany

|June 8, 2011

Summary

This summary is machine-generated.

Molecular dating reveals basal eudicots diversified rapidly in the Early Cretaceous. This study used fossil constraints to estimate divergence times for key lineages like Ranunculales and Proteales.

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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group

Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group

Published on: August 16, 2017

Area of Science:

Botany
Evolutionary Biology
Molecular Phylogenetics

Background:

Basal eudicots represent a critical early radiation in flowering plant evolution.
Accurate molecular dating is essential for understanding plant evolutionary history.

Purpose of the Study:

To perform molecular dating of basal eudicot lineages.
To investigate the impact of fossil constraints and dating methods on age estimates.

Main Methods:

Utilized rbcL gene sequences from GenBank for targeted taxa.
Employed penalized likelihood and nonparametric rate smoothing for molecular dating.
Incorporated fourteen Cretaceous eudicot fossils as minimum age constraints.

Main Results:

Dating methods and fossil choices significantly influence age estimates.
A rapid diversification of basal eudicot lineages occurred in the late Early Cretaceous.
Estimated divergence times: Ranunculales (120 mya), Proteales (119 mya), Sabiales (118 mya), Buxales (117 mya), Trochodendrales (116 mya).

Conclusions:

Multiple fossil constraints improve the reliability of molecular age estimates.
Basal eudicot lineages emerged rapidly during the late Early Cretaceous period.