Mutations in the melanocortin-1 receptor (MC1R) gene have no influence on the distinct patterns of melanic plumage found in the manakins of the genus Antilophia (Aves: Pipridae)

The melanocortin-1 receptor gene is the most widely-used marker for the investigation of the genetic determination of melanic plumage patterns. Studies of a number of wild bird species have shown an association between non-synonymous mutations of the MC1R gene and the presence of melanic variants. T...

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Bibliographic Details
Published in:Anais da Academia Brasileira de Ciências 2018-07, Vol.90 (3), p.2873-2879
Main Authors: Luna, Leilton W, Silva, Weber A Girão E, Araripe, Juliana, Pereira, Isadora T F, D'Horta, Fernando M, Sampaio, Iracilda, Schneider, Horacio, Rêgo, Péricles S DO
Format: Article
Language:English
Subjects:
Animals
candidate gene
Female
Genetic Variation
Genotype
Male
manakin
melanism
MULTIDISCIPLINARY SCIENCES
Mutation - genetics
neutral evolution
Passeriformes - anatomy & histology
Passeriformes - genetics
Phenotype
Pigmentation - genetics
plumage color
Receptor, Melanocortin, Type 1 - genetics
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Summary:The melanocortin-1 receptor gene is the most widely-used marker for the investigation of the genetic determination of melanic plumage patterns. Studies of a number of wild bird species have shown an association between non-synonymous mutations of the MC1R gene and the presence of melanic variants. The genus Antilophia (Pipridae) includes only two manakin species (A. galeata and A. bokermanni), which are distinguished primarily by the differences in the pattern of melanic coloration of the plumage of the mantle in the adult males. In A. galeata, this plumage is black, while in A. bokermanni, it is predominantly white. This study investigates the possible association between mutations of the MC1R marker and the variation in plumage coloration observed in the two species. The MC1R sequences of the two species was analyzed, and the observed nucleotide variation was compared. Six polymorphic sites were identified, representing seven distinct genotypes. Five of these polymorphic mutations were non-synonymous, but were not related to the different phenotypes. Neutral evolution and the absence of any systematic association between the variants of the MC1R and plumage coloration in the Antilophia species indicate that alternative mechanisms regulate the expression of the coloration of the plumage in the adult males.
ISSN:0001-3765
1678-2690
1678-2690
DOI:10.1590/0001-3765201820171003