Effects of dibutyryl cAMP on growth performance and carcass traits in finishing pigs

文献类型： 外文期刊

第一作者： Wang, L.

作者： Wang, L.;Jiang, Z. Y.;Lin, Y. C.;Zheng, C. T.;Jiang, S. Q.;Ma, X. Y.

作者机构：

关键词： Dibutyryl cAMP;Carcass traits;Growth performance;Finishing pigs

期刊名称：LIVESTOCK SCIENCE （ 影响因子：1.943； 五年影响因子：2.252 ）

ISSN： 1871-1413

年卷期： 2012 年 146 卷 1 期

页码：

收录情况： SCI

摘要： This study was designed to investigate the effects of dietary supplementation with N-6, 2'-O-dibutyryl adenosine 3',5'-cyclic monophosphate (dbcAMP) on growth performance, carcass traits, histochemical characteristics and serum constituents in finishing pigs. Seventy-two Duroc x (Landrace x Large White) barrows (57.3 +/- 0.6 kg) were randomly allotted to 3 treatments with 6 replicate pens/treatment (4 pigs/pen). The pigs were fed diets containing 0, 10 and 20 mg dbcAMP/kg, respectively, until the final slaughter weight of approximately 90 kg. There were no differences in growth performance among dietary treatments. Leaf fat proportion and first rib backfat thickness were reduced (P<0.05), whereas tenth rib backfat thickness tended to decrease (P = 0.10), in pigs fed 10 mg dbcAMP/kg. Lean percentage was greater (P<0.05) and longissimus muscle area tended to increase (P = 0.10) in pigs fed 10 mg dbcAMP/kg when compared to the control group, but hot carcass weight was not affected by dbcAMP. Growth rate of fat-free lean tissues tended to increase (P = 0.09) in dbcAMP-supplemented pigs. Dietary dbcAMP decreased (P<0.05) adipocytes diameter in subcutaneous fat, whereas longissimus muscle fiber diameter tended to increase (P = 0.06) with dbcAMP supplementation; however, no difference in longissimus muscle cell density was detected among treatments. Serum concentrations of total protein and 3',5'-cyclic adenosine monophosphate increased (P<0.05) in response to dbcAMP, but concentrations of triglycerides, total cholesterol, glucose and urea in serum did not differ among dietary treatments. These results indicate that dbcAMP had a positive effect on carcass traits. Addition of 10 mg dbcAMP/kg to the diet was beneficial for growth performance and lean percentage, as well as improving protein and fat metabolism. (C) 2012 Elsevier B.V. All rights reserved.

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