Effect of environmental and genetic factors on weights at ninety days of age Holstein calves

Authors

  • Álvaro João Lacerda de Almeida Universidade Federal de Lavras, Lavras, MG
  • Guilherme Paes Guaragna Instituto de Zootecnia, Estação Experimental de Zootecnia de Pindamonhangaba, SP
  • Geraldo Gonçalves Carneiro Universidade Federal de Lavras, Lavras, MG
  • Fernando Lima Pires Instituto de Zootecnia, Divisão de Zootecnia de Bovinos Leiteiros, Seção de Melhoramento de Gado Leiteiro, Nova Odessa, SP

Keywords:

calf weight, heritability of calf weight

Abstract

The 90 days weight from 814 Holstein calves was studied. They were born though out 19 years. The average live weight was 85.0 ± 10.5 kg; 88.1 kg for male and 83.0 for female. They regressional model includ effects of year and month of birth., sex, gestation lenght and cow age and respond for 32.63% the variation year and sex were the more importants factors and the interation was not important. The bighests weights was for the births from january to march, for gestation of 280 to 300 days and for cows of 7 to 9 years. The heritability estmates for 90 days weigth was 0.36 ± 0.11 and indicate the possible improvement by selection.

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Published

2014-01-15

Issue

Section

ANIMAL BREEDING

How to Cite

Effect of environmental and genetic factors on weights at ninety days of age Holstein calves. (2014). Bulletin of Animal Husbandry, 47(1), 31-41. http://35.198.24.243/index.php/bia/article/view/748

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