Portal de Periódicos da CAPES

Colour patterns and gene frequencies in natural populations of a platyfish

1950; Springer Nature; Volume: 4; Issue: 1 Linguagem: Inglês

10.1038/hdy.1950.4

1365-2540

H. McL. Gordon, Myron Gordon,

Identification and Quantification in Food

THE platyfish, Platypoecilus maculatus Gunther, is one of the most highly polymorphic vertebrates in Central and North America, having over 150 recognisable colour patterns in its various natural populations.The black colour patterns are genetically controlled by two groups of genes.First, an autosomal series consisting of seven dominant alleles (Gordon, 1947) determines melanic patterns at or near the base of the tail fin ; these patterns are composed of micromelanophores.Second, a sex-linked series consisting of five dominant alleles (Gordon, 5948) produces another group of melanic patterns on the body proper; these, however, are composed of macromelanophores, pigment cells which are much larger and more prominent than those which form the tail patterns.According to a recent genetic and geographical analysis of the inheritance and distribution of the seven tail patterns, Gordon (5947) indicated that the four natural populations of the platyfish from the Rio Jamapa, Rio Papaloapan, Rio Coatzacoalcos and Rio Usumacinta are genetically distinct.In that analysis only single tail patterns were