作者：
Hu, Q.;Liu, Z. Q.;Yao, K.;Wu, X.;Yang, L. Y.;...
期刊：
Journal of Food, Agriculture and Environment,2010年8(3-4):39-46 ISSN：1459-0255
通讯作者：
Ruan, Z.
作者机构：
[Deng, Z. Y.; Ruan, Z.; Hu, Q.] Nanchang Univ, Coll Life Sci & Food Engn, State Key Lab Food Sci & Technol, Nanchang 330031, Peoples R China.;[Liu, Z. Q.; Wu, X.; Hu, Q.; Pan, J.; Yao, K.] Chinese Acad Sci, Inst Subtrop Agr, Lab Anim Nutr & Hlth, Changsha 410125, Hunan, Peoples R China.;[Yang, L. Y.] Hunan Agr Univ, Coll Anim Sci & Technol, Changsha, Hunan, Peoples R China.
通讯机构：
[Ruan, Z.] N;Nanchang Univ, Coll Life Sci & Food Engn, State Key Lab Food Sci & Technol, Nanchang 330031, Peoples R China.
关键词：
Developmental pattern;suckled crossbred piglets;gene expression;growth hormone;insulin-like growth factor I
摘要：
A total of thirty (15 male and female, respectively) suckled crossbred piglets (DurocxLandraccxYorkshine) were selected and divided into five groups at the ages of 1, 7, 14, 21 and 28 d after birth, respectively. Piglets were weighed and blood and tissue (liver and longissimus dorsi) samples were collected from a total of 30 piglets at different ages. There were no significant differences (P>0.05) between male and female, but there were significant differences (P<0.05) among ages during the early postnatal development for the concentration and mRNA abundance in serum, liver and longissimus dorsi (LD) of suckled crossbred piglets growth hormone and insulin-like growth factor-I (IGF-I). There were the different development curve pattern (linear, quadratic, cubic or quartic) of age effects (P<0.05) on the concentration and mRNA expression of suckled crossbred piglets growth hormone GH and IGF-I during the early postnatal development from 1 to 28 d of ages. Pearson's analysis showed serum OH concentration correlated with serum IGF-I concentration, IGF-I mRNA abundance of LD, BW and the relative body weight of LD. Serum IGF-I concentration correlated with liver IGF-I concentration, IGF-I mRNA abundance of LD and BW. Liver IGF-I concentration correlated with GHR mRNA abundance of LD, IGF-I mRNA abundance of liver and LD, IGF-IR mRNA abundance of LD, BW and the relative body weight of LD. LD IGF-I concentration correlated with IGF-I mRNA abundance of liver and LD, IGF-IR mRNA abundance of LD and BW. Liver IGF-I mRNA abundance correlated with growth hormone receptor GHR mRNA abundance of liver, IGF-I mRNA abundance of LD, BW and the relative body weight of LD. LD IGF-I mRNA abundance correlated with GHR mRNA abundance of liver, IGF-IR mRNA abundance of LD, BW and the relative body weight of LD, respectively.
作者机构：
[Zhu, X. Z.; Tian, L. X.; Liu, Y. -J.] Sun Yat Sen Univ, Inst Aquat Econ Anim, Sch Life Sci, W Guangzhou, Peoples R China.;[Mai, K. S.] Ocean Univ China, Coll Fisheries, Qingdao, Peoples R China.;[Zhang, Q. H.; Zheng, C. Q.; Cai, M. C.; Zheng, S. X.] Guangdong Yuehai Feed Grp Co Ltd, Zhanjiang, Peoples R China.;[Pan, Q. J.] So Med Univ, Sch Basic Med Sci, Guangzhou, Guangdong, Peoples R China.;[Hu, Y.] Hu Nan Agr Univ, Coll Anim Sci & Technol, Changsha, Hunan, Peoples R China.
通讯机构：
[Liu, Y. -J.] S;Sun Yat Sen Univ, Inst Aquat Econ Anim, Sch Life Sci, 135 Xingang W, Guangzhou 510275, Guangdong, Peoples R China.
摘要：
This study was conducted to investigate the effects of different levels of dietary lysine (DLys) on growth performance, serum metabolites, and carcass composition in growing-finishing barrows fed to achieve a body weight (BW) of about 70 kg from an initial weight of 40 kg. The average daily gain (ADG) and gainrfee (G/F) increased (P < 0.05) as the level of DLys increased. The dressing percentage of barrows in the 0.91 % DLys treatment group was larger (P < 0.05) than that in the other two groups. Other chemical indexes of body composition, including protein, ash, lipid accretion rates and estimated lean yields, were also affected (P < 0.05) by the level of dietary DLys. Findings suggest that barrows fed diets providing 14.21 MJ of digestible energy/kg from over a period during which body weight increases from 40 to 70 kg, show the maximum ADG and G/F when the concentration of DLys is 0.91%, which corresponds approximately to an intake of 18.4 g/day DLys and 0.63 g of DLys/MJ of DE, respectively.
