ArticleBMC genetics2010
Chromosome differentiation patterns during cichlid fish evolution.
Article in BMC genetics, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 49 papers.
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49 citing papers in PubMed.
- Near-complete genomes for nine haplochromine cichlid fishes reveal a novel centromeric satellite structure organised around a pair of inverted elements.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2026Article
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- Before the East African Radiation: Sex Chromosome Systems in Basal Haplotilapiine Cichlids.Genome biology and evolution · 2026Article
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- The Role of Repetitive Sequences in Repatterning of Major Ribosomal DNA Clusters in Lepidoptera.Genome biology and evolution · 2023Article
- Comprehending the dynamism of B chromosomes in their journey towards becoming unselfish.Frontiers in cell and developmental biology · 2022Review
- Large-scale comparative analysis of cytogenetic markers across Lepidoptera.Scientific reports · 2021Article
- Origin of a Giant Sex Chromosome.Molecular biology and evolution · 2021Article
- A genomic glimpse of B chromosomes in cichlids.Genes & genomics · 2021Review
- Comparative cytogenetic of six species of Amazonian Peacock bass (Comparative cytogenetics · 2020Article
- Chromosome comparison among five species of Neotropical cichlids of Cichlasoma and Gymnogeophagus (Perciformes).Genetics and molecular biology · 2020Article
- Changing sex for selfish gain: B chromosomes of Lake Malawi cichlid fish.Scientific reports · 2019Article
- Adaptive Radiation from a Chromosomal Perspective: Evidence of Chromosome Set Stability in Cichlid Fishes (Cichlidae: Teleostei) from the Barombi Mbo Lake, Cameroon.International journal of molecular sciences · 2019Article
- Extensive Chromosomal Reorganization inInternational journal of molecular sciences · 2019Article
Corrections and comments
- Erratum issued
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10 authors.
Funding
Abstract
backgroundCichlid fishes have been the subject of increasing scientific interest because of their rapid adaptive radiation which has led to an extensive ecological diversity and their enormous importance to tropical and subtropical aquaculture. To increase our understanding of chromosome evolution among cichlid species, karyotypes of one Asian, 22 African, and 30 South American cichlid species were investigated, and chromosomal data of the family was reviewed.
resultsAlthough there is extensive variation in the karyotypes of cichlid fishes (from 2n = 32 to 2n = 60 chromosomes), the modal chromosome number for South American species was 2n = 48 and the modal number for the African ones was 2n = 44. The only Asian species analyzed, Etroplus maculatus, was observed to have 46 chromosomes. The presence of one or two macro B chromosomes was detected in two African species. The cytogenetic mapping of 18S ribosomal RNA (18S rRNA) gene revealed a variable number of clusters among species varying from two to six.
conclusionsThe karyotype diversification of cichlids seems to have occurred through several chromosomal rearrangements involving fissions, fusions and inversions. It was possible to identify karyotype markers for the subfamilies Pseudocrenilabrinae (African) and Cichlinae (American). The karyotype analyses did not clarify the phylogenetic relationship among the Cichlinae tribes. On the other hand, the two major groups of Pseudocrenilabrinae (tilapiine and haplochromine) were clearly discriminated based on the characteristics of their karyotypes. The cytogenetic mapping of 18S ribosomal RNA (18S rRNA) gene did not follow the chromosome diversification in the family. The dynamic evolution of the repeated units of rRNA genes generates patterns of chromosomal distribution that do not help follows the phylogenetic relationships among taxa. The presence of B chromosomes in cichlids is of particular interest because they may not be represented in the reference genome sequences currently being obtained.
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