African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12487

Short Communication

Analysis of two single-nucleotide polymorphisms (SNPs) located in exon 1 of kappa-casein gene (CSN3) in Martina Franca donkey breed

Maria Selvaggi* and Cataldo Dario        
Department of Animal Health and Welfare, University of Bari, strada prov. le per Casamassima Km 3 – 70010, Valenzano (Ba), Italy.  
Email: [email protected]

  •  Accepted: 18 January 2011
  •  Published: 13 June 2011


The aim of this study is to assess genetic polymorphism at two loci in the exon 1 of the kappa-casein gene (CSN3) in Martina Franca donkey breed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis. Martina Franca donkey was derived from the Catalan donkey brought to Apulia at the time of the Spanish rule. This donkey is tall and well built and has good temperament. Both considered loci were found to be monomorphic in the considered population. At CSN3/Pstlocus, all the animals were genotyped as AA since no AG and GG animals were found in the population. A similar result was found at CSN3/BseYIlocus: all the donkeys were monomorphic and genotyped as AA. As a consequence, only one out of nine possible combined genotype (AAAA) was detected.


Key words: Martina Franca donkey, kappa-casein gene (CSN3), gene polymorphism, polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP).


 aa, Amino acids; SNPs, single-nucleotide polymorphisms; PCR-RFLP, polymerase chain reaction-restriction fragment length polymorphism; CSN3,kappa-casein gene.