[Genetic parameters in Angora rabbits]
1994
Magofke S, Juan Carlos | Garcia F, Ximena (Universidad de Chile, Santiago (Chile). Fac. de Ciencias Agrarias y Forestales. Dept. de Produccion Animal) | Arinoviche N, Myriam
In order to estimate repeatability, heritability and genetic, phenotypic and environmental correlations on hair production (both simple and accumulated) and body weight of Angora Rabbits, the first 10 shearings of 1.119 rabbits of a private breeder located at Panaflor, Metropolitan Region were analyzed. Heritability and genetic correlations were estimated by intraclass correlations, using sire variance and covariance components. Data was previously corrected, considering the effect of intershearing lapse, shearing month, sex, and shearer. Repeatability of hair production from 2 to 9 and 2 to 10 shearings was 0.21 and 0.28 respectively. Both values decreased if included the first shearing. Heritability of simple shearings reached an average value 0.19. Accumulated production showed an increasing tendency, though its maximum value was not over 0.33. Genetic correlation was higher than phenotypic and environmental ones. Its value increased with age, until the sixth shearing, both in simple shearing and in global production. Heritability of body weight fluctuated from 0.21 (132 days) to a maximum value of 0.33 (423 days). Genetic correlations between body weight and hair production were higher than phenotypic ones. Genetic correlations between body weight records, from the second to the fifth shearings were always higher than 0.81. Phenotypic correlations, however, fluctuated from 0.36 to 0.57. Similar estimation between body weight and simple hair production at 132, 328 and 517 days were 0.33, 0.25 and -0.20 for genetic correlation and 0.09, 0.08 and 0.04 for phenotypic ones. Genetic correlations using accumulated hair production were slightly higher at 132 and 328 days, nevertheless negative values remain on considering the body weight at 517 days
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