scholarly journals Multilocus Species Trees Show the Recent Adaptive Radiation of the Mimetic Heliconius Butterflies

2015 ◽  
Vol 64 (3) ◽  
pp. 505-524 ◽  
Author(s):  
Krzysztof M. Kozak ◽  
Niklas Wahlberg ◽  
Andrew F. E. Neild ◽  
Kanchon K. Dasmahapatra ◽  
James Mallet ◽  
...  
Keyword(s):  
Adaptive Radiation ◽  
Species Trees ◽  
Heliconius Butterflies

scholarly journals A widely diverged locus involved in locomotor adaptation in Heliconius butterflies

2021 ◽  
Vol 7 (32) ◽  
pp. eabh2340
Author(s):  
Yubo Zhang ◽  
Dequn Teng ◽  
Wei Lu ◽  
Min Liu ◽  
Hua Zeng ◽  
...  
Keyword(s):  
Adaptive Evolution ◽  
Adaptive Radiation ◽  
Locomotor Adaptation ◽  
Multiple Genes ◽  
As Species ◽  
Wing Patterns ◽  
Rapid Divergence ◽  
Heliconius Butterflies ◽  
The Continuum

Heliconius butterflies have undergone adaptive radiation and therefore serve as an excellent system for exploring the continuum of speciation and adaptive evolution. However, there is a long-lasting paradox between their convergent mimetic wing patterns and rapid divergence in speciation. Here, we characterize a locus that consistently displays high divergence among Heliconius butterflies and acts as an introgression hotspot. We further show that this locus contains multiple genes related to locomotion and conserved in Lepidoptera. In light of these findings, we consider that locomotion traits may be under selection, and if these are heritable traits that are selected for, then they might act as species barriers.

scholarly journals Multilocus Species Trees Show the Recent Adaptive Radiation of the Mimetic Heliconius Butterflies

2014 ◽  
Author(s):  
Krzysztof M Kozak ◽  
Niklas Wahlberg ◽  
Andrew Neild ◽  
Kanchon K Dasmahapatra ◽  
James Mallet ◽  
...  
Keyword(s):  
Adaptive Radiation ◽  
Rate Increase ◽  
Environmental Changes ◽  
Species Trees ◽  
Nuclear Markers ◽  
Continental Scale ◽  
The Past ◽  
History Of ◽  
Methodological Approaches ◽  
Mitochondrial And Nuclear Markers

Müllerian mimicry among Neotropical Heliconiini butterflies is an excellent example of natural selection, and is associated with the diversification of a large continental-scale radiation. Some of the processes driving the evolution of mimicry rings are likely to generate incongruent phylogenetic signals across the assemblage, and thus pose a challenge for systematics. We use a dataset of 22 mitochondrial and nuclear markers from 92% of species in the tribe to re-examine the phylogeny of Heliconiini with both supermatrix and multi-species coalescent approaches, characterise the patterns of conflicting signal and compare the performance of various methodological approaches to reflect the heterogeneity across the data. Despite the large extent of reticulate signal and strong conflict between markers, nearly identical topologies are consistently recovered by most of the analyses, although the supermatrix approach fails to reflect the underlying variation in the history of individual loci. The first comprehensive, time-calibrated phylogeny of this group is used to test the hypotheses of a diversification rate increase driven by the dramatic environmental changes in the Amazonia over the past 23 million years, or changes caused by diversity-dependent effects on the rate of diversification. We find that the tribe Heliconiini had doubled its rate of speciation around 11 Ma and that the presently most speciose genus Heliconius started diversifying rapidly at 10 Ma, likely in response to the recent drastic changes in topography of the region. Our study provides comprehensive evidence for a rapid adaptive radiation among an important insect radiation in the most biodiverse region of the planet.

Phylogeny of actin and tubulin gene homologs in diverse eukaryotic species

2019 ◽  
Vol 79 (01S) ◽  
Author(s):  
Pawan Kumar Jayaswal ◽  
Asheesh Shanker ◽  
Nagendra Kumar Singh
Keyword(s):  
Evolutionary Relationship ◽  
Genomic Data ◽  
Gene Clusters ◽  
Species Trees ◽  
Model Species ◽  
Tubulin Gene ◽  
Tubulin Genes ◽  
Eukaryotic Species ◽  
Relationship Of ◽  
Insight Into

Actin and tubulin are cytoskeleton proteins, which are important components of the celland are conserved across species. Despite their crucial significance in cell motility and cell division the distribution and phylogeny of actin and tubulin genes across taxa is poorly understood. Here we used publicly available genomic data of 49 model species of plants, animals, fungi and Protista for further understanding the distribution of these genes among diverse eukaryotic species using rice as reference. The highest numbers of rice actin and tubulin gene homologs were present in plants followed by animals, fungi and Protista species, whereas ten actin and nine tubulin genes were conserved in all 49 species. Phylogenetic analysis of 19 actin and 18 tubulin genes clustered them into four major groups each. One each of the actin and tubulin gene clusters was conserved across eukaryotic species. Species trees based on the conserved actin and tubulin genes showed evolutionary relationship of 49 different taxa clustered into plants, animals, fungi and Protista. This study provides a phylogenetic insight into the evolution of actin and tubulin genes in diverse eukaryotic species.

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