Genetic variability in Mediterranean buffalos evaluated by pedigree analysis

Ciência Rural

Milton Rezende Teixeira Neto²  Jurandir Ferreira Da Cruz¹  Alcides Amorim Ramos¹  Paulo Luiz Souza Carneiro¹  Danielle Maria Machado Ribeiro Azevêdo¹  Riccardo Bozzi¹  Carlos Henrique Mendes Malhado¹ 

[1] ,Universidade Estadual do Sudoeste da Bahia (UESB)Itapetinga BA ,Brasil

关键词: Bubalus bubalis;    inbreeding;    population genetic structure;    founders;    ancestors;    Bubalus bubalis;    endogamia;    estrutura genética populacional;    fundadores;    ancestrais;   

DOI  :  10.1590/S0103-84782012001100021

来源: SciELO

【 摘 要 】

The objective of this research was to study the population genetic structure of four herds of Mediterranean buffaloes in Brazil. It was used pedigree data from 6,588 buffaloes of Mediterranean breed born from 1980 to 2002. Of the total number of animals studied, 60.5, 15.3 and 2.1% had a pedigree in the first, second and third ascendancy, respectively. The effective number of herds that provided breeding males was 1.60 for parents, 1.16 for grandparents and 1.00 for great-grandparents. There were 923 founder animals and only 71 effective founders. The effective number of ancestors explaining the genetic variability of the population was 71 and only 30 ancestors accounted for 50% of the genetic variability of the population. The average relatedness coefficient (AR) between individuals and inbreeding (F) of the population were estimated at 0.37 and 0.34% respectively. The average estimate of generation interval was 8.71±2.85 years. The variability of the current population is the result of a few ancestors, who are mostly also founders showing that the population was developed from a narrow genetic base which characterizes the occurrence of founder effect.

【 授权许可】

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