Mapping of quantitative trait loci underlying a magic trait in ongoing ecological speciation
| Autor: | Teiji Sota, Atsushi J. Nagano, Tetsumi Takahashi |
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| Rok vydání: | 2021 |
| Předmět: |
Male
Telmatochromis temporalis Polygenic inheritance Genetic Linkage Lake Tanganyika Quantitative Trait Loci QH426-470 Biology Quantitative trait locus Ecological speciation Cichlid fish Cichlid Genetic linkage Genetics Animals Humans Gene Hybrid Research Chromosome Mapping Body size Cichlids biology.organism_classification Phenotype Evolutionary biology Trait Female TP248.13-248.65 Biotechnology |
| Zdroj: | BMC Genomics BMC Genomics, Vol 22, Iss 1, Pp 1-9 (2021) |
| ISSN: | 1471-2164 |
| Popis: | Background Telmatochromis temporalis is a cichlid fish endemic to Lake Tanganyika. The normal and dwarf morphs of this fish are a clear example of ongoing ecological speciation, and body size plays an important role in this speciation event as a magic trait. However, the genetic basis underlying this trait has not been studied. Results Based on double-digested restriction-site associated DNA (ddRAD) sequencing of a hybrid cross between the morphs that includes F0 male, F0 female, and 206 F2 individuals, we obtained a linkage map consisting of 708 ddRAD markers in 22 linkage groups, which corresponded to the previously reported Oreochromis niloticus chromosomes, and identified one significant and five suggestive quantitative trait loci (QTL) for body size. From the body-size distribution pattern, the significant and three of the five suggestive QTL are possibly associated with genes responsible for the difference in body size between the morphs. Conclusions The QTL analysis presented here suggests that multiple genes, rather than a single gene, control morph-specific body size. The present results provide further insights about the genes underlying the morph specific body size and evolution of the magic trait during ecological speciation. |
| Databáze: | OpenAIRE |
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