Genetic constraints predict evolutionary divergence in Dalechampia blossoms.
Geir H. Bolstad,Thomas F. Hansen,Christophe Pélabon,Mohsen Falahati-Anbaran,Mohsen Falahati-Anbaran,Rocío Pérez-Barrales,W. Scott Armbruster,W. Scott Armbruster,W. Scott Armbruster +8 more
Reads0
Chats0
TLDR
This work uses recently developed measures of evolvability to test the genetic constraint hypothesis with quantitative genetic data on floral morphology from the Neotropical vine Dalechampia scandens, and finds clear evidence for genetic constraints, particularly among traits that were tightly phenotypically integrated.Abstract:
If genetic constraints are important, then rates and direction of evolution should be related to trait evolvability. Here we use recently developed measures of evolvability to test the genetic constraint hypothesis with quantitative genetic data on floral morphology from the Neotropical vine Dalechampia scandens (Euphorbiaceae). These measures were compared against rates of evolution and patterns of divergence among 24 populations in two species in the D. scandens species complex. We found clear evidence for genetic constraints, particularly among traits that were tightly phenotypically integrated. This relationship between evolvability and evolutionary divergence is puzzling, because the estimated evolvabilities seem too large to constitute real constraints. We suggest that this paradox can be explained by a combination of weak stabilizing selection around moving adaptive optima and small realized evolvabilities relative to the observed additive genetic variance.read more
Citations
More filters
Journal ArticleDOI
Comparative Analysis of Principal Components Can be Misleading
TL;DR: It is demonstrated precisely how using standard PCA can mislead inferences: the first few principal components of traits evolved under constant-rate multivariate Brownian motion will appear to have evolved via an "early burst" process.
Journal ArticleDOI
Integrated phenotypes: understanding trait covariation in plants and animals
W. Scott Armbruster,W. Scott Armbruster,W. Scott Armbruster,Christophe Pélabon,Geir H. Bolstad,Thomas F. Hansen +5 more
TL;DR: It is suggested that care be invested in relating measurement to underlying theory or hypotheses, and that summative, theory-free descriptors of integration generally be avoided.
Journal ArticleDOI
Evolution of morphological allometry
Christophe Pélabon,Cyril Firmat,Geir H. Bolstad,Kjetil L. Voje,David Houle,Jason A. Cassara,Arnaud Le Rouzic,Thomas F. Hansen +7 more
TL;DR: Evidence is reviewed for and against the allometry‐as‐a‐constraint hypothesis, which suggests that allometries have low evolvability and could constrain phenotypic evolution by forcing evolving species along fixed trajectories.
Journal ArticleDOI
Mutation predicts 40 million years of fly wing evolution
TL;DR: The evidence for a strong relationship between mutation and divergence in a slowly evolving structure challenges the existing models of mutation in evolution.
Journal ArticleDOI
Floral specialization and angiosperm diversity: phenotypic divergence, fitness trade-offs and realized pollination accuracy
TL;DR: The role of flowers in the diversification and increased phenotypic disparity (phenotypic diversity) of angiosperms depends on the system as mentioned in this paper, and their capacity to have specialized functions, increase speciation rates or decrease extinction rates.
References
More filters
Journal Article
R: A language and environment for statistical computing.
TL;DR: Copyright (©) 1999–2012 R Foundation for Statistical Computing; permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and permission notice are preserved on all copies.
Journal ArticleDOI
The neighbor-joining method: a new method for reconstructing phylogenetic trees.
Naruya Saitou,Masatoshi Nei +1 more
TL;DR: The neighbor-joining method and Sattath and Tversky's method are shown to be generally better than the other methods for reconstructing phylogenetic trees from evolutionary distance data.
Journal ArticleDOI
Regularization and variable selection via the elastic net
Hui Zou,Trevor Hastie +1 more
TL;DR: It is shown that the elastic net often outperforms the lasso, while enjoying a similar sparsity of representation, and an algorithm called LARS‐EN is proposed for computing elastic net regularization paths efficiently, much like algorithm LARS does for the lamba.
Journal ArticleDOI
Regularization Paths for Generalized Linear Models via Coordinate Descent
TL;DR: In comparative timings, the new algorithms are considerably faster than competing methods and can handle large problems and can also deal efficiently with sparse features.
Journal ArticleDOI
APE: Analyses of Phylogenetics and Evolution in R language
TL;DR: UNLABELLED Analysis of Phylogenetics and Evolution (APE) is a package written in the R language for use in molecular evolution and phylogenetics that provides both utility functions for reading and writing data and manipulating phylogenetic trees.
Related Papers (5)
Measuring and comparing evolvability and constraint in multivariate characters
Thomas F. Hansen,David Houle +1 more