血浆极低密度脂蛋白浓度的双向选择对肉鸡生长性能与血脂的影响  

Correlated Responses to Divergent Selection for Plasma Very Low Density Lipoprotein Concentration for Broiler Chickens: Growth Performance and Plasma Lipids

作　　者：陈金文[1] 杨山[2] 文伯珍[3] 赵河山[3] 胡刚安[3] 雷春[3] 王世成[4] 

机构地区：[1]解放军农牧大学军事兽医研究所 [2]东北农业大学动物科学系 [3]广东省农业科学院畜牧研究所 [4]莱阳农学院动物科学系

出　　处：《中国兽医学报》1998年第2期199-202,共4页Chinese Journal of Veterinary Science

摘　　要：对零世代８周龄肉鸡血浆极低密度脂蛋白（ＶＬＤＬ）浓度进行降低腹脂的间接选择，明显改善了一世代低ＶＬＤＬ系鸡生长期饲料转化率，并对８周龄血浆甘油三酯、总脂浓度产生明显影响，但对８周龄血浆胆固醇浓度及各周龄体重未产生明显影响。低ＶＬＤＬ系鸡饲料转化率优于高ＶＬＤＬ系，肉仔鸡耗料比，５～９周龄高ＶＬＤＬ系明显高于低ＶＬＤＬ系（Ｐ＝０．０５），而７～９周龄高ＶＬＤＬ系显著高于低ＶＬＤＬ系（Ｐ＜０．０１）。８周龄血浆甘油三酯及总脂浓度，高ＶＬＤＬ系显著高于低ＶＬＤＬ系（Ｐ＜０．００１，Ｐ＜０．０１）。一世代高、低ＶＬＤＬ系血浆ＶＬＤＬ和腹脂的变异系数仍然很大，继续选择以培育脂肪更低、饲料转化率更高的低脂系是可能的，各周龄体重的变异系数不高（小于２５％），但高、低ＶＬＤＬ系的变异系数大大高于总变异系数，表明选择使高、低ＶＬＤＬ系体重的整齐度降低，因此，继续对血浆ＶＬＤＬ浓度结合体重选择效果会更好。The indirect selection on low plasma very low density lipoprotein (VLDL) resulted in a good effect on reducing abdominal fat (AF) of broilers, improved feed conversion efficiency of L VLDL line broilers at the G1 generation, and had significant effects on plasma triglyceride and total lipids concentrations at 8 weeks of age, but had no evident effects on plasma cholestrol concentration at 8 weeks of age and body weight at various ages. Feed conversion efficiency was better in L VLDL line than in H VLDL line. Feed/gain ratio of broilers was higher in H VLDL line than in L VLDL line from 5 to 9 weeks of age (P=0.05),and significantly higher from 7 to 9 weeks of age (P<0.01). Plasma triglyceride and total lipid concentrations of H VLDL line broilers were significantly higher than those of L VLDL ones at 8 weeks of age (P<0.001, P<0.01).When the plasma VLDL selected continuously, it would be able to breed a low fat line of broiler chickens whose body fat much lower and food conversion efficiency much better in the light of high coefficience of variation of plasma VLDL and AF at the G1 generation. Coefficient of variation of body weight at varing ages was not high (<25%), but those in H VLDL and L VLDL lines were 1 to 2 fold higher than overall coefficient of variation, and it was shown that selection had decreased tidy degrees of body weight in both lines. Therefore, selection progress seems to be greater when plasma VLDL and body weight selected simultaneously.

关 键 词：极低密度脂蛋白 双向选择 生长性能 血脂 肉鸡 

分 类 号：S831[农业科学—畜牧学]