Caracterização genética de populações ovinas nativas do estado da Paraíba

Abstract

A total of 290 sheep of breed Morada Nova (MN), Cariri (Ca),Dorper (D) and Cara Curta (CC) and Barriga Negra (BN) genetic groups of Paraíba State it was investigated to quantify the genetic variability inter and intra-population through protein polymorphisms and microsatelite. The blood samples were collected and the plasm used in the analyses of isoelectric focusing of the albumin (Alb) and transferrin (Tf); the eritrocites to analyse malic enzyme (EM), peptidase-B (Pep-B), fosfogliconato desidrogenase (PGD), diaforase I and II (DIA-I and DIA-II) and hemoglobin (Hb) by conventional eletroforese and the leucocites were used in DNAanalyses. The results showed that 73% of the investigated locos were polimorphic. The albumin (Alb), Peptidase-B (Pep-B) and diaforase-II (DIA-II) loci was monomorphic. The markers investigated in this work was efficient and could be considered very informative for the identification and investigation of paternity of the studied genetic groups. Based on GST values , the EM, Tf, DIA-I and Hb locos had the most contribution in differentiation among the five populations. In despit of many more advanced techniques, the proteins polymorphisms presentes useful information in genetic characterization studies. The dendrogram built starting from the genetic distances with base in the five loci of proteins and three microsatellities structured the five populations, presenting two main clusters: one containing the four native breed and another with the exotic breed. Morada Nova and Cara Curta breed presented the largest genetic similarity. The Barriga Negra and Cariri group in spite of they share the same cluster they meet distant to each others native groups and Dorper breed, suggesting belong to different groups.