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Estimates of heritability for resistance to Boophilus microplus tick evaluated by an alternative method in a commercial polled Hereford x Nelore population in Brazil



Estimates of heritability for resistance to Boophilus microplus tick evaluated by an alternative method in a commercial polled Hereford x Nelore population in Brazil



Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006: 16-12



Tick resistance was measured in yearling animals with genetic compositions varying from pure Hereford to pure Nelore from Conexao Delta G. Counts of B. microplus female ticks were made in the inner hind legs region of the body. Estimates of broad and narrow sense heritabilities were 0.23+or-0.063 and 0.19+or-0.059, respectively. When logarithmic transformation of the number of ticks were used, estimates of 0.34+or-0.07 and 0.25+or-0.07 were obtained.

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