Study of polymorphic systems in Nelore cattle (Bos taurus indicus L.) associated with beef production. I. Hemoglobins: Weights and gain from birth to second parturition

Authors

  • Luciano Ricardo Marcondes da Sivla Instituto de Zootecnia, Estação Experimental de Zootecnia de Pindamonhangaba, SP
  • Leopoldo Andrade de Figueiredo Instituto de Zootecnia, Estação Experimental de Zootecnia de Sertãozinho, SP
  • Marcos Vinícius Gualberto Barbosa da Silva Instituto de Zootecnia, Estação Experimental de Zootecnia de Pindamonhangaba, SP
  • Alexander George Razook Instituto de Zootecnia, Estação Experimental de Zootecnia de Sertãozinho, SP
  • Laércio José Pacola Instituto de Zootecnia, Estação Experimental de Zootecnia de Sertãozinho, SP

Keywords:

beef production, genetic markers, hemoglobin biochemical polymorphism, Nelore

Abstract

A sample of 114 females, from the herds of the Zertaozinho's Experiment Station (SP), maintained on range conditions, was used to observe the Castle-Hardy-Weingberg equilibrium for hemoglobin polymorphism. Another objective was to verify a possible relationship with growth traits like birth (PN), weaning (PD) and yearling weight (P18), gain from birth to weaning (GPND) and also 1st parturition (PAP1) and 2nd parturition (PAP2) weights. Statistical analyses were performed by least square means for unbalanced subclass numbers and the chi-square test was utilized to check the Castle-Hardy-Weinberg equilibrium. Adjusted means and standard errors for PN, PD, P18, PAP1, PAP2 and GPND were respectively: AA = 28,66 ± 1,39 kg; AB = 27,05 ± 1,27 kg; BB = 30,35 ± 2,82 kg; AA = 165,74 ± 6,11 kg; AB = 162,13 ± 5,62 kg; BB = 171,90 ± 12,42 kg; AA = 258,45 ± 6,74 kg; AB = 258,43 ± 6,20 kg; BB = 295,85 ± 13,71 kg; AA = 367,42 ± 9,71 kg; AB - 373,47 ± 8,97 kg; BB = 431,24 ± 19,77 kg; AA = 405,83 ± 17,85 kg; AB = 411,83 ± 16,38 kg; BB = 451,84 ± 34,37 kg; AA = 0,69 ± 0,02 kg; AB = 0,65 ± 0,02kg; BB = 0,75 ± 0,05 kg. The hemoglobin type influenced significantly the yearling weight and 1st parturition, and the highest means were for Hb-BB hemoglobin type. The phenotypic frequencies for the hemoglobin types were in equilibrium of Castle-Hardy-Weinberg.

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Published

2014-01-14

Issue

Section

ANIMAL BREEDING

How to Cite

Study of polymorphic systems in Nelore cattle (Bos taurus indicus L.) associated with beef production. I. Hemoglobins: Weights and gain from birth to second parturition. (2014). Bulletin of Animal Husbandry, 53, 1-6. http://bia.iz.sp.gov.br/index.php/bia/article/view/983

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