Molecular Nutrition

Effects of Adding Exogenous Inosinic Acid in Diets of Breeding Hens and Offspring Broilers on Growth Performance, Meat Quality and Related Gene Expression of Offspring Broilers

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  • 1. Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China;
    2. Laboratory of Animal Improvement and Reproduction, Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China

Received date: 2018-07-02

  Online published: 2019-02-18

Abstract

The objective of this study was to investigate the effects of adding exogenous inosinic acid (IMP) in diets of breeding hens and offspring broilers on growth performance, meat quality and related gene expression of offspring broilers. A total of 864 Arbor Acres (AA) breeding hens (20-week-old) with similar genetic background, weight and 5% egg production rate were randomly divided into 2 groups with 6 replicates in each group and 72 broilers in each replicate. Hens in the control group were fed a basic diet, and the others in the experimental group were fed the basic diet supplemented with 0.5% inosinic acid. The experiment lasted for 30 days. One week before the end of the experiment, the laying rate of hens reached the peak, a total of 3 700 eggs were continuously collected for 7 days and hatched. After hatching, a total of 3 000 one-day-old broilers were selected and divided into 4 groups according to the maternal group, named Ⅱ (mother feed basal diet+0.5% inosinic acid, offspring feed basal diet+0.5% inosinic acid), IN (mother feed basal diet+0.5% inosinic acid, offspring feed basal diet), NI (mother feed basal diet, offspring feed basal diet+0.5% inosinic acid) and NN group (mother feed basal diet, offspring feed basal diet), each group had 6 replicates and 125 birds in each replicate. The experiment lasted for 42 days. The results showedas follows:1) compared with the NN group, the average daily feed intake, average daily gain and feed to gain ratio in Ⅱ, IN and NI groups were no significant difference (P>0.05). 2) Compared with the NN group, the breast muscle rate and leg muscle rate in Ⅱ, IN and NI groups were no significant difference (P>0.05); the abdominal fat rate in Ⅱ group was significantly higher than that in NI group (P<0.05). 3) Compared with the NN group, the values of redness (a*) and yellowness (b*) of breast muscle and leg muscle in Ⅱ, IN and NI groups were no significant difference (P>0.05), the breast muscle brightness (L*) value in Ⅱ group was significantly decreased (P<0.05); the pH45 min and pH24 h of breast muscle and leg muscle in IN and NI groups were significantly increased (P<0.05); the pH24 h of breast muscle in IN and NI groups was significantly increased (P<0.05); the pH24 h of leg muscle in Ⅱ, IN and NI groups was significantly increased (P<0.05). 4) Compared with the NN group, the relative expression level of glutamine phosphoribosylpyrophosphate amidotransferase (GPAT) gene of breast muscle and leg muscle in Ⅱ, IN and NI groups at 21 and 42 days of age was no significant difference (P>0.05), the relative expression level of adenylosuccinate lyase (ADSL) gene of breast muscle in NI group and that of leg muscle in IN group at 21 days of age was significantly increased (P<0.05), the relative expression level of ADSL gene of breast muscle in Ⅱ and IN groups at 42 days of age was significantly increased (P<0.05). These results suggest that adding exogenous inosinic acid in diets of breeding hens and offspring broilers have no significant effect on growth performance and slaughter performance of offspring broilers; and can increase muscle pH, decrease breast muscle L* value, improve the relative expression of ADSL gene, and improve meat quality of offspring broilers to a certain extent.

Cite this article

ZHOU Bo, YAN Junshu, WU Le, WANG Yingjie, HUAN Hailin, ZHOU Weiren, LI Yao . Effects of Adding Exogenous Inosinic Acid in Diets of Breeding Hens and Offspring Broilers on Growth Performance, Meat Quality and Related Gene Expression of Offspring Broilers[J]. Chinese Journal of Animal Nutrition, 2019 , 31(2) : 638 -651 . DOI: 10.3969/j.issn.1006-267x.2019.02.020

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