Figure 1: Distribution of AHR1 genotypes of 113 avian species in a phylogenic tree of avian species constructed by Prum et al.23.
From: Ecological factors drive natural selection pressure of avian aryl hydrocarbon receptor 1 genotypes
Each AHR1 genotype is distinguished by color: pink (highly sensitive Ile_Ser type), green (moderately sensitive Ile_Ala type), and blue (low sensitivity Val_Ala type). (a) The distribution of avian species excluding the Passeriformes. The Val_Ala type was favored in 13 orders (Anseriformes, Phoenicopteriformes, Gruiformes, Gaviformes, Ciconiiformes, Suliformes, Sphenisciformes, Charadriiformes, Accipitriformes, Strigformes, Coraciiformes, Piciformes, and Falconiformes). Ile_Ala type was favored in Galliformes. (b) The distribution of genotypes in the Passeriformes, the Ile_Ala type was the most common.
