›› 2019, Vol. 46 ›› Issue (6): 1713-1722.doi: 10.16431/j.cnki.1671-7236.2019.06.018

• Genetics and Breeding • Previous Articles     Next Articles

Effects of Mild Fatty Liver on Slaughter Performance and Meat Quality in Dwarf Yellow Chickens

TAN Xiaodong, LIU Ranran, ZHAO Guiping, CUI Huanxian, LI Qinghe, ZHENG Maiqing, WEN Jie   

  1. State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2018-11-13 Online:2019-06-20 Published:2019-06-19

Abstract:

This experiment was conducted to study the effects of mild fatty liver on slaughter performance and meat quality of dwarf Jingxing-Huang chickens at marketing age.At age of 98 days,273 male chickens were selected randomly from the same batch experimental population by two times,the slaughter performance,meat quality and serum biochemical indices were tested.The liver tissuees were collected for evaluating the fatty liver through HE staining and Oil Red O staining.A total number of 53 chickens,which had vacuolar degeneration,and more fat deposition were detected in the disordered liver cells,were considered as mild fatty liver group.For the rest 219 chickens,which liver cells were tightly arranged without obvious denatured feature,were considered as the control group.Compared with the control group,the results of mild fatty liver group were as follows:①The serum triglyceride,total cholesterol,and low density lipoprotein content increased extremely significantly (P<0.01),the liver weight and liver index also increased significantly or extremely significantly,respectively (P<0.05;P<0.01),the cholesterol content was positively correlated with liver weight extremely significantly (P<0.01).② Slaughter performance was improved,the live weight,dressed weight,eviscerated weight and thigh muscle weight increased significantly or extremely significantly (P<0.05;P<0.01).③ Meat quality was improved significantly,the intramuscular fat content increased extremely significantly both in breast and thigh muscle (P<0.01),the shear force decreased significantly or extremely significantly in breast and thigh muscle,respectively (P<0.05;P<0.01).For breast muscle,L*45 min and L*24 h decreased significantly (P<0.05),and the a*45 min increased extremely significantly (P<0.01),the pH24 h was only 0.04 lower in mild fatty liver group,but the difference was significant (P<0.05).④ The abdominal fat deposited excessively,the weight and percent of abdominal fat increased extremely significantly (P<0.01).The above results indicate that,at the marketing age,the occurrence of mild fatty liver was accompanied by the improvement on slaughter performance and meat quality,however,it also caused excess deposition of abdominal fat.

Key words: broiler; fatty liver; slaughter performance; meat quality

CLC Number: