SciELO - Scientific Electronic Library Online

 
vol.42 issue2Genetic analysis of body weight in South African Angora kids and young goatsEffect of forage sources and Saccharomyces cerevisiae (Sc 47) on ruminal fermentation parameters author indexsubject indexarticles search
Home Pagealphabetic serial listing  

South African Journal of Animal Science

Print version ISSN 0375-1589

Abstract

DAVIDS, A.H. et al. Genetic variation within and among three ostrich breeds, estimated by using microsatellite markers. S. Afr. j. anim. sci. [online]. 2012, vol.42, n.2, pp. 156-163. ISSN 0375-1589.

Genetic diversity within and among three ostrich populations was investigated to corroborate whether these populations can be classified genetically as three different breeds. The DNA of South African Black (SAB, n = 30), Zimbabwean Blue (ZB, n = 32) and Kenyan Redneck (KR, n = 17) birds was assessed for genetic differences using 19 microsatellite loci. The number of alleles, as well as observed and expected heterozygosity of alleles, was determined. Genetic differentiation was measured using the F-statistic (FST) and Nei's genetic distance. Significant differences were observed among the three breeds. The SAB and ZB (F ST = 0.10 and Nei = 0.49) were genetically more similar, whereas the genetic distance between the KR and ZB breeds was the greatest (FST= 0.13 and Nei = 0.61). The SAB strain exhibited the greatest observed heterozygosity (Ho = 0.72) within its population while the ZB and the KR exhibited lower levels of heterozygosity (Ho = 0.68). Based on these results, it was suggested that crossbreeding between these breeds would lead to heterosis in commercial ostrich enterprises.

Keywords : Breed; genetic differentiation; heterosis; heterozygosity.

        · text in English     · pdf in English