Phenotypic plasticity of Cuban Zebu sires evaluated in different Cuban regions
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Abstract
contemporary group and age at the start of the test as quadratic covariate are included. In all enterprises the heritabilities and Spearman correlations between the breeding values of sires with offspring were obtained. The hertabilities were of 0.239 ± 0.047, 0.244 ± 0.056, 0.284 ± 0.040, 0.261 ± 0.044 and 0.153 ± 0.065, for “Camilo Cienfuegos”, “San Juan”, “Rodas” and “Rescate de Sanguily” and genetic and rearing “Manuel Fajardo”, respectively. Breeding values varied between -29.31 and 36.51 kg. "Rodas" and "Rescate de Sanguily" cattle enterprises were of higher range, while the Genetic and Rearing Enterprise "Manuel Fajardo" showed low fluctuations, but higher mean (6.94). Positive and low correlations between breeding values (0.28 - 0.58) indicated the phenotypic plasticity existence, that is manifested in changes in the ranking. It is concluded that it could assess the use, not only of robust animals (which behave appropriately in all regions of the country), but animals with phenotypic plasticity and higher breeding values for a specific region. It achieves increase in live weight.
Key words: Cuban Zebu, genotype - environment interaction, region
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