关键词: 田鼠, 婚配制度, 神经系统, 激素, 受体基因

Abstract: Mating systems as the expression of breeding behaviors, resulted from evoluition with species-specific aspects and hereditability. Thus difference in mating systems might be based on diversity of physiological procedures. The recent studies have implicated the neurohypophyseal peptides oxytocin (if) and vasopressin AVP) in the central mediation of complex social behaviors correlated to monogamy and promiscuity. Comparison of the behaviors and expressive regions of OT receptor and AVP receptor in the brain among several species of vole have identified species-specific patterns of these receptors that appear to relate to a monogamous versus promiscuous social structure. Molecular approaches show that changes in the regulative sequence of OTand AVP-receptor gene underlie these species differences in receptor distribution and might provide a mechanism responsible for the evolution of mating system in voles.

Key words: Vole, Mating system, Neural system, Hormone, Receptor gene