کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5906812 1159987 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Short CommunicationSequence variation in the Mc1r gene for a group of polymorphic snakes
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی ژنتیک
پیش نمایش صفحه اول مقاله
Short CommunicationSequence variation in the Mc1r gene for a group of polymorphic snakes
چکیده انگلیسی

Studying the genetic factors underlying phenotypic traits can provide insight into dynamics of selection and molecular basis of adaptation, but this goal can be difficult for non-model organisms without extensive genomic resources. However, sequencing candidate genes for the trait of interest can facilitate the study of evolutionary genetics in natural populations. We sequenced the melanocortin-1 receptor (Mc1r) to study the genetic basis of color polymorphism in a group of snake species with variable black banding, the genera Sonora, Chilomeniscus, and Chionactis. Mc1r is an important gene in the melanin synthesis pathway and is associated with ecologically important variation in color pattern in birds, mammals, and other squamate reptiles. We found that Mc1r nucleotide sequence was variable and that within our focal Sonora species, there are both fixed and heterozygous nucleotide substitutions that result in an amino acid change and selection analyses indicated that Mc1r sequence was likely under purifying selection. However, we did not detect any statistical association with the presence or absence of black bands. Our results agree with other studies that have found no role for sequence variation in Mc1r and highlight the importance of comparative data for studying the phenotypic associations of candidate genes.

► We sequenced the melanocortin-1 receptor (Mc1R) for three polymorphic snake genera ► Mc1R was variable with both synonymous and nonsynonymous mutations ► There was no association between sequence variation and melanistic polymorphism ► Mc1R appears to be evolving under purifying selection in these snakes ► Future studies should broaden the molecular and taxonomic scope of this research

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gene - Volume 513, Issue 2, 25 January 2013, Pages 282-286
نویسندگان
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