Reproductive efficiency of Mantiqueira herd of Estação Experimental de Zootecnia de Pindamonhangaba. II - Genetics and phenotypics parameters

Authors

  • Guilherme Paes Guaragna Instituto de Zootecnia, Estação Experimental de Zootecnia de Pindamonhangaba, SP

Abstract

Date from a basic herd of Mantiqueira type cattle. raised at the €œEstação Experimental de Zootecnia de Pindamonhangaba€, over a 30 years period, since its information in 1952 were studied. Some aspects of reproduction of 443 cows born in the farm over five generations by martenal line, daughters of 25 sires, were considered to study the genetic parameters of age first calving (AFC), calving interval (Cl), service period (SP), gestation lenght (GL) and birth weight (BW). Heritability (h2) and repeatability (t) estimates for, the reproductive traits by the paternal half-sibs correlation were: AFC: h2 0.407 ± 0.160;CI:h2 =0.086 ± 0.055andt =0.133 ± 0.028;SP:h2 =0.175 ± 0.080 and t 0.120 ± 0.027;GL:h2 = 0.056 ± 0.0039and t =0.133 and BW:h2 =0.054 ± 0.038 and t =0.120 ± 0.023.

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Published

2014-01-29

Issue

Section

ANIMAL REPRODUCTION

How to Cite

Reproductive efficiency of Mantiqueira herd of Estação Experimental de Zootecnia de Pindamonhangaba. II - Genetics and phenotypics parameters. (2014). Bulletin of Animal Husbandry, 45(1), 73-87. http://bia.iz.sp.gov.br/index.php/bia/article/view/706

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