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Effects of dietary amylose to amylopectin ratio on growth performance,carcass quality characteristics and meat fatty acids in chinese qinchuan cattle

引用

Journal of Integrative Agriculture 2021年第12期20卷 3256-3269页

作者： PIAO Min-yu HU Feng-ming KONG Fan-lin LIU Yun-long WANG Shuo CUI Kai SUN Tao DIAO Qi-yu TU Yan Institute of Feed Research Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Beijing Key Laboratory for Dairy Cow Nutrition Beijing Municipal Commission of Science and TechnologyBeijing 100744P.R.China Sino-US Joint Laboratory on Nutrition and Metabolism of Ruminants Beijing 100081P.R.China ABNA Management(Shanghai)Co. Ltd.Shanghai 200051P.R.China

This study evaluated the effects of the dietary starch amylose/amylopectin ratio on growth performance,rumen fermentation and blood parameters,carcass characteristics and marbling score,and meat fatty acid profiles and transcriptional changes in the genes involved in the gluconeogenesis pathway in chinese qinchuan ***-five cattle were randomly divided into three *** bulls were fed a control diet(middle amylose/amylopectin ratio=0.47)or diets with either waxy corn starch(WS)inclusion(low amylose/amylopectin ratio=0.23)or pea starch(PS)inclusion(high amylose/amylopectin ratio=0.60)for 90 *** bulls were individually allowed to receive the diets at the daily amount of at least 2.1%of their individual BW twice *** bulls were weighed at 45-day intervals,and blood and rumen fluid samples were also collected at 45-day *** bulls were slaughtered and longissimus thoracis(LT)samples were collected for meat quality *** with PS,the average daily gain(ADG)and feed efficiency in control and WS were increased(P0.05)among the three *** with PS,the serum insulin concentration in WS was increased(P<0.05)at d 45,but not at d *** with control and WS,the serum SOD and T-AOC concentrations in PS were increased(P<0.05)at d 45,but not at d *** with control,the rumen microbial crude protein contents in WS and PS were increased(P<0.05)at d 0,while those of control and WS were higher(P<0.05)than that of PS at d 45,but not at d *** with PS,the backfat thickness in control and WS were increased(P<0.05),however,the marbling score and expression of genes related to the gluconeogenesis pathway in l

关键词： amylose/amylopectin ratio chinese qinchuan cattle utilization efficiency of starch gluconeogenesis intramuscular fat

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