TAILIEUCHUNG - Báo cáo khoa hoc:" Genetic polymorphism of milk proteins in African Bos taurus and Bos indicus populations"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Genetic polymorphism of milk proteins in African Bos taurus and Bos indicus populations | Genet. Sei. Evol. 31 1999 239-253 Inra Elsevier Paris 239 Original article Genetic polymorphism of milk proteins in African Bos taurus and Bos indicus populations. Characterization of variants X -Cn H and K-Cn J Marie-Frangoise Mahéa Guy Mirandab Rémy QuevaF Abou Badoc Paul Souvenir Zafindrajaonad Frangois Grosclaudea a Laboratoire de génétique biochimique et de cytogénétique Institut national de la recherche agronomique 78352 Jouy-en-Josas cedex France b Laboratoire de biochimie et structure des protéines Institut national de la recherche agronomique 78352 Jouy-en-Josas cedex France c Centre international de recherche-développement sur 1 élevage en zone subhumide 01 . 454 Bobo-Dioulasso 01 Burkina-Faso d Laboratoire de recherches vétérinaires et zootechniques de Farcha . 433 N Djamena Chad Received 30 October 1999 accepted 16 February 1999 Abstract - The polymorphism of caseins a-lactalbumin and 3-lactoglobulin was investigated in African Bos taurus N Dama Baoulé Kuri and Bos indicus Shuwa Arab Sudanese Fulani populations. The respective frequencies of alleles asi-CnB and asi-Cnc in the N Dama and and Baoulé and breeds were almost opposite to those found in the Shuwa Arab zebu and a true zebu which confirms a phenomenon already documented in the literature. Because the asi-CnB ớ-CnA t-CnB haplotype was strongly predominant in N Dama and Baoulé and as compared to the asi-CnC 3-CnA2 K-CnA haplotype in the Shuwa Arab zebu an opposite trend in frequencies was also observed between taurines and zebus at the 3-Cn and K-Cn loci. These results confirm that the polymorphism of caseins provides an efficient marker system to discriminate Bos taurus from Bos indicus origins. The Kuri was at an intermediate position since in this population the sl-CnB allele predominated as in taurines while the Correspondence and reprints E-mail jngroscl@ 240 . Mahé et al. asi-CnC d-C nA2 K-CnA haplotype was the most .

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