ArticleBMC evolutionary biology2018
Chromosomal variation among populations of a fungus-farming ant: implications for karyotype evolution and potential restriction to gene flow.
Article in BMC evolutionary biology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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11 citing papers in PubMed.
- Phylogenetic conservation and diversification of 18S rDNA loci in leaf-cutting ants (Hymenoptera, Formicidae): insights from molecular validation and chromosomal mapping using FISH.Comparative cytogenetics · 2026Article
- Centromeres drive and take a break.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2025Review
- Shifts in Chromosome Evolution Rates Shape the Karyotype Patterns of Leafcutting Ants.Ecology and evolution · 2024Article
- Assessing ploidy levels and karyotype structure of the fire antComparative cytogenetics · 2023Article
- Multiple heterochromatin diversification events in the genome of fungus-farming ants: insights from repetitive sequences.Chromosoma · 2022Article
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- Distribution of GC-rich heterochromatin and ribosomal genes in three fungus-farming ants (Myrmicinae, Attini, Attina): insights on chromosomal evolution.Comparative cytogenetics · 2021Article
- Comparative FISH-mapping of TTAGG telomeric sequences to the chromosomes of leafcutter ants (Formicidae, Myrmicinae): is the insect canonical sequence conserved?Comparative cytogenetics · 2020Article
- Karyotype and putative chromosomal inversion suggested by integration of cytogenetic and molecular data of the fungus-farming antComparative cytogenetics · 2020Article
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4 authors.
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Abstract
backgroundIntraspecific variation in chromosome structure may cause genetic incompatibilities and thus provides the first step in the formation of species. In ants, chromosome number varies tremendously from 2n = 2 to 2n = 120, and several studies have revealed considerable variation in karyotype within species. However, most previous studies were limited to the description of chromosome number and morphology, and more detailed karyomorphometric analyses may reveal additional, substantial variation. Here, we studied karyotype length, genome size, and phylogeography of five populations of the fungus-farming ant Trachymyrmex holmgreni in order to detect potential barriers to gene flow.
resultsChromosome number and morphology did not vary among the five populations, but karyotype length and genome size were significantly higher in the southernmost populations than in the northern populations of this ant. Individuals or colonies with different karyotype lengths were not observed. Karyotype length variation appears to result from variation in centromere length.
conclusionT. holmgreni shows considerable variation in karyotype length and might provide a second example of centromere drive in ants, similar to what has previously been observed in Solenopsis fire ants. Whether this variation leads to genetic incompatibilities between the different populations remains to be studied.
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