Abstract
Fermented cottonseed meal (FCSM) is widely used in poultry diets in China. This study was conducted to investigate the effect of FCSM on lipid-related gene expression in broilers. Initially, 180 broiler chickens (21-days-old, equal number of males and females) were randomly divided into three groups, with six pens per group and 10 birds per pen. The chickens in the control group were fed a diet containing unfermented cottonseed meal, and those in the treatment groups were fed with diets including either CSM fermented by Candida tropicalis (Ct group) or CSM fermented by Candida tropicalis plus Saccharomyces cerevisae (Ct-Sc group) until 64 days old. The results revealed that, compared with the control group (p 0.05). Likewise, the expressions of peroxisome proliferator-activated receptor gamma (PPAR-g) and LPL in the abdominal fat were not altered by the FCSM-supplemented diets (p>0.05). The results in this study indicate that CSM fermented by Candida tropicalis and Saccharomyces cerevisiaeeffectively regulated the genes involved in fatty acid b-oxidation and triglyceride hydrolysis in male broiler chickens. Furthermore, the effects of the FCSM-supplemented diets were significantly different between bird sexes and between yeast strains used in the fermentation process.
Highlights
In modern broiler production, excessive fat deposition, especially of abdominal fat, is a major concern in the poultry industry (Zaboli et al, 2013)
The results in this study indicate that Cottonseed meal (CSM) fermented by Candida tropicalis and Saccharomyces cerevisiae effectively regulated the genes involved in fatty acid β-oxidation and triglyceride hydrolysis in male broiler chickens
The results reveal that liver and abdominal fat absolute and relative weights were not significantly (p>0.05) affected by the addition of Fermented cottonseed meal (FCSM) to the broiler diets
Summary
Excessive fat deposition, especially of abdominal fat, is a major concern in the poultry industry (Zaboli et al, 2013). Fat is a main form of energy deposition in the body; excessive fat deposition demands high energy supply and results in energy loss. The more body fat that a chicken has, the lower the possible lean meat yield of that chicken, which is highly problematic because lean meat has the high nutritional value and it is preferred by consumers (de Genova Gaya et al, 2005; Duarte et al, 2013). Because low lean meat yield is undesirable for consumers, it is causes processing losses. It is evident that excessive fat in broilers is detrimental for the broiler industry
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