Speciation through chromosomal fusion and fission in Lepidoptera.
Reads0
Chats0
TLDR
The first comprehensive literature survey of karyotypes for Lepidoptera species since the 1970s and phylogenetic diversification rate analyses indicated a strong, positive association of rates of chromosome number evolution and speciation are suggested.Abstract:
Changes in chromosome numbers may strongly affect reproductive barriers, because individuals heterozygous for distinct karyotypes are typically expected to be at least partially sterile or to show reduced recombination. Therefore, several classic speciation models are based on chromosomal changes. One import mechanism generating variation in chromosome numbers is fusion and fission of existing chromosomes, which is particularly likely in species with holocentric chromosomes, i.e. chromosomes that lack a single centromere. Holocentric chromosomes evolved repeatedly across the tree of life, including in Lepidoptera. Although changes in chromosome numbers are hypothesized to be an important driver of the spectacular diversification of Lepidoptera, comparative studies across the order are lacking. We performed the first comprehensive literature survey of karyotypes for Lepidoptera species since the 1970s and tested if, and how, chromosomal variation might affect speciation. Even though a meta-analysis of karyological differences between closely related taxa did not reveal an effect on the degree of reproductive isolation, phylogenetic diversification rate analyses across the 16 best-covered genera indicated a strong, positive association of rates of chromosome number evolution and speciation. These findings suggest a macroevolutionary impact of varying chromosome numbers in Lepidoptera and likely apply to other taxonomic groups, especially to those with holocentric chromosomes. This article is part of the theme issue 'Towards the completion of speciation: the evolution of reproductive isolation beyond the first barriers'.read more
Citations
More filters
Journal ArticleDOI
Towards the completion of speciation: the evolution of reproductive isolation beyond the first barriers
TL;DR: It is suggested that more theoretical and empirical work, considering both patterns and processes associated with strong RI, is needed to understand how speciation is completed, and it is likely to involve different processes, or new interactions among processes, compared with the evolution of the first reproductive barriers.
The Butterfly Plant Arms-Race Escalated via Gene and Genome Duplications
TL;DR: In this article, the authors investigated the mechanisms of an ancient arms race between butterflies and plants, seen today in countless gardens as caterpillars of cabbage butterflies that devour cabbage crop varieties.
Journal ArticleDOI
Chromosome Fusion Affects Genetic Diversity and Evolutionary Turnover of Functional Loci but Consistently Depends on Chromosome Size.
Francesco Cicconardi,Francesco Cicconardi,James J. Lewis,Simon H. Martin,Robert D. Reed,Charles G. Danko,Stephen H. Montgomery +6 more
TL;DR: In this paper, the authors examined the evolutionary consequences of multiple chromosome fusions in Heliconius butterflies and showed that chromosome size and fusion impact turnover rates of functional loci at a macroevolutionary scale.
Journal ArticleDOI
A telomere-to-telomere assembly of Oscheius tipulae and the evolution of rhabditid nematode chromosomes.
Pablo Manuel Gonzalez de la Rosa,Marian Thomson,Urmi Trivedi,Alan Tracey,Sophie Tandonnet,Mark Blaxter +5 more
TL;DR: In this article, the authors explore the phylogenetic stability of nematode chromosomes using a new telomere-to-telomere assembly of the rhabditine Oscheius tipulae generated from nanopore long reads.
Journal ArticleDOI
Why sequence all eukaryotes?
Mark Blaxter,John M. Archibald,Anna K. Childers,Jonathan A. Coddington,Keith A. Crandall,Federica Di Palma,Richard Durbin,Scott V. Edwards,Jennifer A. Marshall Graves,Kevin J. Hackett,Neil Hall,Erich D. Jarvis,Elinor K. Karlsson,W. John Kress,Shigehiro Kuraku,Mara K. N. Lawniczak,Kerstin Lindblad-Toh,Jose V. Lopez,Nancy A. Moran,Gene E. Robinson,Oliver A. Ryder,Beth Shapiro,Pamela S. Soltis,Tandy Warnow,Guojie Zhang,Harris A. Lewin +25 more
TL;DR: It is suggested that many questions of evolutionary and ecological significance will only be addressable when whole-genome data representing divergences at all of the branchings in the tree of life or all species in natural ecosystems are available.
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
MAFFT Multiple Sequence Alignment Software Version 7: Improvements in Performance and Usability
Kazutaka Katoh,Daron M. Standley +1 more
TL;DR: This version of MAFFT has several new features, including options for adding unaligned sequences into an existing alignment, adjustment of direction in nucleotide alignment, constrained alignment and parallel processing, which were implemented after the previous major update.
Journal ArticleDOI
RAxML version 8: a tool for phylogenetic analysis and post-analysis of large phylogenies.
TL;DR: This work presents some of the most notable new features and extensions of RAxML, such as a substantial extension of substitution models and supported data types, the introduction of SSE3, AVX and AVX2 vector intrinsics, techniques for reducing the memory requirements of the code and a plethora of operations for conducting post-analyses on sets of trees.
Journal ArticleDOI
MrBayes 3.2: Efficient Bayesian Phylogenetic Inference and Model Choice across a Large Model Space
Fredrik Ronquist,Maxim Teslenko,Paul van der Mark,Daniel L. Ayres,Aaron E. Darling,Sebastian Höhna,Bret Larget,Liang Liu,Marc A. Suchard,John P. Huelsenbeck +9 more
TL;DR: The new version provides convergence diagnostics and allows multiple analyses to be run in parallel with convergence progress monitored on the fly, and provides more output options than previously, including samples of ancestral states, site rates, site dN/dS rations, branch rates, and node dates.
Journal ArticleDOI
phytools: an R package for phylogenetic comparative biology (and other things)
TL;DR: A new, multifunctional phylogenetics package, phytools, for the R statistical computing environment is presented, with a focus on phylogenetic tree-building in 2.1.