Dietary effects on muscle fatty acid composition of finished heifers

Regiane Gregório Da Silva,Nilson Evelázio De Souza,Ivanor Nunes Do Prado,Makoto Matsushita

doi:10.1590/s0100-204x2002000100013

Regiane Gregório Da Silva, Nilson Evelázio De Souza + Show 2 more

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https://doi.org/10.1590/s0100-204x2002000100013

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Journal: Pesquisa Agropecuária Brasileira	Publication Date: Jan 1, 2002
Citations: 30	License type: cc-by

Abstract

The effects of diet on Longissimus muscle fatty acid composition was determined using 24 crossbred heifers of Simmental vs. Nelore and Limousin vs. Nelore. The experimental diets were: 1) corn and yeast (CY); 2) corn, cottonseed meal + meat and bones meal (CMB); 3) cassava hull and yeast (CHY); 4) cassava hull, cottonseed meal + meat and bones meal (CHMB). Feeding CHMB diets resulted in lower lipid and higher cholesterol contents (P<0.05) for both crosses. Most of the identified fatty acids were monounsaturated, and the highest percentage was found to oleic acid (C18:1w9), with values ranging from 32.54 to 46.42%. Among the saturated fatty acids the palmitic acid (C16:0) showed the highest percentage, with its contents ranging between 19.40 and 32.44%. The highest polyunsaturated/saturated fatty acid ratio was of 0.30, and the lowest was of 0.08. Feeding CY diets resulted in lower cholesterol and higher polyunsaturated fatty acid contents of the Longissimus muscle.

Highlights

Efforts to improve the cattle productivity through breeding or nutritional changes may only be completed when the composition and palatability of the meat are considered (Mills et al, 1992)
Dissertation presented by the first author to Universidade Estadual de Maringá (UEM), Maringá, PR
The purpose of this study was to determine the effect of diet on Longissimus muscle composition and fatty acid profiles of crossbred heifers finished in a feedlot

Summary

Introduction

Efforts to improve the cattle productivity through breeding or nutritional changes may only be completed when the composition and palatability of the meat are considered (Mills et al, 1992). (1)Accepted for publication on December 19, 2000. It important to include fatty acid analysis in the evaluation of the meat composition (Mills et al, 1992). Feedlot is one of the systems used to increase the breeding productivity of beef cattle, with positive effects on the carcass quality and on the meat offered between the harvest seasons. The success of the intensive exploration of beef cattle in feedlot is related to the available supply and cost of the used rations

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