Title: kappa-casein, beta-lactoglobulin and growth hormone allele frequencies and genetic distances in Nelore, Gyr, Guzera, Caracu, Charolais, Canchim and Santa Gertrudis cattle

Author(s):  Kemenes PA, Regitano LCD, Rosa AJD, Packer IU, Razook AG, de Figueiredo LA, Silva NA, Etchegaray MAL, Coutinho LL

Source:  GENETICS AND MOLECULAR BIOLOGY 22 (4): 539-541 DEC 1999

Document Type:  Article

Language:  English

Abstract:  The genotypes for kappa-casein (kappa-CN), beta-lactoglobulin (beta-LG) and growth hormone (GH) were determined by polymerase chain reaction (PCR) and restriction enzyme digestion in seven breeds of cattle (Nelore, Gyr, Guzera, Caracu, Charolais, Canchim and Santa Gertrudis). kappa-Casein had two alleles with the A allele occurring at a higher frequency in Bos indicus breeds (0.93, 0.92 and 0.91% for Gyr, Guzera and Nelore, respectively). The beta-lactoglobulin locus had two alleles in all of the breeds. European breeds had a higher frequency of the beta-LG A allele than Zebu breeds. The GH locus had two alleles (L and V) in Bos taurus and was monomorphic (L allele only) in ail of the Bos indicus breeds evaluated. The highest frequency for the V allele was observed in Charolais cattle. The markers used revealed a considerable similarity among breeds, with two main groups being discernible. One group consisted of Zebu and Santa Gertrudis breeds and the other consisted of European and Canchim breeds.

KeyWords Plus:  MILK PROTEIN POLYMORPHISMS; PRODUCTION TRAITS; GENOTYPES; AMPLIFICATION; BULLS

Addresses:  Coutinho LL (reprint author), USP, ESALQ, Dept Zootecn, Av Padua Dias 11, Piracicaba, SP BR-13418900 Brazil
USP, ESALQ, Dept Zootecn, Piracicaba, SP BR-13418900 Brazil
Agroceres PIC, Rio Claro, SP Brazil
EMBRAPA, CPPSE, Sao Carlos, SP Brazil
USP, FMRP, Dept Genet, Ribeirao Preto, SP Brazil
Inst Zootecn Sertaozinho, Sertaozinho, SP Brazil Publisher:  SOC BRASIL GENETICA, RUA CAP ADELMIO NORBET DA SILVA, 736, ALTO DA BOA VISTA, 14025-670 RIBEIRAO PRET, BRAZIL

Subject Category:  BIOCHEMISTRY & MOLECULAR BIOLOGY; GENETICS & HEREDITY

IDS Number:  268ZA

ISSN:  1415-4757