Apr 19, 2018

Oxytocin and arginine vasopressin systems in the domestication process

Genetics and Molecular Biology
Bibiana S O FamMaria Catira Bortolini

Abstract

Domestication is of unquestionable importance to the technological revolution that has given rise to modern human societies. In this study, we analyzed the DNA and protein sequences of six genes of the oxytocin and arginine vasopressin systems (OXT-OXTR; AVP-AVPR1a, AVPR1b and AVPR2) in 40 placental mammals. These systems play an important role in the control of physiology and behavior. According to our analyses, neutrality does not explain the pattern of molecular evolution found in some of these genes. We observed specific sites under positive selection in AVPR1b (ω = 1.429, p = 0.001) and AVPR2 (ω= 1.49, p = 0.001), suggesting that they could be involved in behavior and physiological changes, including those related to the domestication process. Furthermore, AVPR1a, which plays a role in social behavior, is under relaxed selective constraint in domesticated species. These results provide new insights into the nature of the domestication process and its impact on the OXT-AVP system.

  • References49
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Citations

Mentioned in this Paper

Study
AVPR1B
Patterns
Genes
AVPR1b protein, human
Placenta
AVPR1A protein, human
Societies
Oxytocin
AVPR2 gene

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