Article(electronic)August 25, 2017

Phenotypic evaluation of trait types in Guzerá cows of different calving orders

In: Semina: revista cultural e científica da Universidade Estadual de Londrina. Ciências agrárias, Volume 38, Issue 4Supl1, p. 2755

Lima Júnior, Dorgival Morais de; Rangel, Adriano Henrique do Nascimento; Lima, Guilherme Ferreira da Costa; Mota, Lúcio Flávio Macedo; Difante, Gelson Dos Santos; Urbano, Stela Antas; Pinheiro, Waldonys Moreira

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Abstract

The objective of this study was to evaluate the effect of parity on linear trait types in Guzerá cows using multivariate techniques. Data were collected from 68 purebred Guzera females, young (1st and 2nd calving order) and adults (3rd to 7th calving order). Measurements were collected using a tape measure, a hypometer, a 40 cm graduated ruler and a 180° protractor. PRCOMP procedure of the R program was used for analyzing the main components. The variables related to rump (height, angularity, ileum and ischium length and width), body (length), udder (height of posterior ligament) and milk production were more important to explain the phenotypic variation in Guzerá cattle. Young Guzerá cows had lower body length, narrower rumps, better udder ligaments and lower milk yield than adult cows.

Publisher

Universidade Estadual de Londrina

ISSN: 1679-0359

DOI

10.5433/1679-0359.2017v38n4suplp2755

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