ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2013, Vol. 44 ›› Issue (5): 673-680.doi: 10.11843/j.issn.0366-6964.2013.05.002

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Analysis on Genetic Polymorphism of Exon 10 of PRLR Gene and Its Association with Distribution Type of Its Maternal Behavior in Hu Sheep

SUN Wei1, ZHANG Xiang-nan1, ZUO Qi-sheng1, NI Rong1, WANG Lan-ping2,ZHANG You-fa3 , CEHN Ling3, WU Wen-zhong3, ZHOU Hong4   

  1. (1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China;2. Yancheng Teachers University, Yancheng 224002, China; 3. Animal Science & Veterinary Medicine Bureau of Suzhou City, Suzhou 215200, China; 4. Forestation, Herding, Fishing Bureau of Suining Country of Xuzhou City, Suining 221200, China)
  • Received:2012-09-20 Online:2013-05-23 Published:2013-05-23

Abstract:

 The aim of this study was to study the genetic diversity of PRLR gene in Hu sheep to discuss its effect on Hu sheep maternal behaviors and provide the genetics analysis method for evaluating sheep maternal behaviors. 81 parturition ewes were used to detect single nucleotide polymorphism of PRLR gene exon10 by using PCR-SSCP, in which 63 individuals were observed for maternal behaviors. The methods of normal distribution test, cluster analysis and nonparametric test were used to reveal the Hu sheep maternal behavior distribution rules and the difference of Hu sheep maternal behavior with various genotypes. The result showed that only the products amplified by primers P3 displayed polymorphisms. The genotypes were AA, AB and BB, and each genotype fitted Hardy-Weinberg equilibrium. The statistical data of licking, nursing, treading and refusing to feed lamb didn’t fit normal distribution. The results of nonparametric test with multiple independent samples showed that the difference of observations for licking, nursing and trampling of individuals with AA, AB and BB genotypes was extremely significant (P<0.01).No obvious difference was found in individuals with three genotypes for the behaviour of refusing to feed young sheep (P>0.05). As the result showed, the partial sequences of PRLR gene exon10 had polymorphisms and there was correlationship between PRLR gene and maternal behaviours. According to the preliminary inference, PRLR gene could be used as candidate gene affecting the Hu sheep maternal behavior.

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