Effect of dietary ω6/ω3 on growth performance, carcass traits, meat quality and fatty acid profiles of Beijing-you chicken

Abstract

The effects of varying the omega6 to omega3 fatty acid ratio (omega6/omega3) of diets on growth performance, carcass traits, meat quality and fatty acid composition of breast muscle were investigated in Beijing-you chickens grown to 92 days. A total of 360 one-day-old female BJY chickens were fed diets containing 0%, 0.12%, 0.42%, 1.00% or 1.97% linseed oil replacing equal weights of maize oil to make dietary omega6/omega3 to be approximately 30:1, 20:1, 10:1, 5:1 and 2.5:1. Subcutaneous fat thickness and intramuscular fat content increased significantly in birds fed up to 10:1 omega6/omega3. a* values (redness of meat, dimension of the CIELAB-system) progressively increased as the diets contained increasing omega3 content, up to the 10:1 omega6/omega3.The changes in b* (yellowness of meat, dimensions of the CIELAB-system) were also significant but the pattern was almost the reverse of changes in a*. Shear force increased significantly as dietary omega6/omega3 was reduced from 30:1 to 5:1. Decreasing the dietary omega6/omega3 clearly decreased the content in breast muscle of C20:1 and C22:1, but increased that of C24:1. C20:4, C20:5 and C22:5, increased significantly by decreasing the dietary omega6/omega3, and the birds fed the 10:1 diet had higher contents of C22:6 than other treatments. This study has clearly demonstrated that decreasing the dietary omega6/omega3, increases the deposition of desirable omega3 and omega6 long chain PUFA in the edible tissue, thereby achieving nutritionally enriched meat.

The effect of dietary fat, vitamin E and selenium concentrations on the fatty acid profile and oxidative stability of frozen stored broiler meat

“…In the group with additional supplementation of both vitamin E and Se, FCR was also significantly worse than in the remaining groups. These findings are in opposition to those of many authors, who reported that the modification of the dietary n-6/n-3 PUFA ratio with the use of plant oils and/or supplementation of diets with higher levels of vitamin E or vitamin E and Se is usually without consequences (Cortinas et al, 2004;Kim et al, 2010;Qi et al, 2010) or has positive effects on bird performance (Młodkowski et al, 2003;Koreleski and Świątkiewicz, 2006).…”

Effect of feeding of 5% prefermented cereal-based bioproduct enriched with γ-linolenic acid on production indicators, chemical composition, fatty acid profile and lipid oxidation of broiler meat

“…The positive effects of exogenous enzymes in poultry diets are widely known and represent one of the trend in modern poultry science (Ravindran 2013;Vieira et al 2014). On the other hand, in the studies where the oils, seeds or oil rich plants were used to supplement PUFA for birds, changes were not recorded (Qi et al 2010) or production indicators were regressed (Sirri et al 2003;Aziza et al 2010;Jaskiewicz et al 2014). Sirri et al (2003) fed broilers (COBB 500) with diets supplemented with 2 or 4% conjugated linoleic acid.…”

Combination of Linseed and Palm Oils is a Better Alternative than Single Oil for Broilers Exposed to High Environmental Temperature

“…In the current experiment, the effect of linseed oil on performance was not as good as those with palm oil or combined oil, which maybe a result of heat increment induced by the high content PUFA in the linseed oil. Qi et al (2010) reported that substituted ω3 for ω6 C18 fatty acid in the diets of chickens tended to improve feed conversion and survival, though there was no effects on growth performance. In the current experiment, the combined oils obtained better performance than single oil, and the possible reason is that both palm and linseed oils have their disadvantages.…”