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The Ⅶ International Symposium on the Nutrition of Herbivores(ISNH-7)

作者： Y.Q.Zhang X.Z.Deng Z.M.Zhou L.P.Ren Q.X.Meng~1 State Key Laboratory of Animal Nutrition Beef Cattle Research Center and College of Animal Science and Technology China Agricultural University Beoing 100094 P.R.China

＜正＞A feeding trial using 12 Holstein bull calves（21±3 d）was conducted to investigate the effect of different processed maize grain and full fat soyabean included in the starter diets on their rumen fermentation and *** treatment starter diets contained different processed maize grain and soyabean:steam-flaked maize and soyabean（SFMS）,extruded maize and soyabean （EMS）,and ground maize and raw soyabean（GMS）.During 10-week trial,total rumen VFA concentration tended to be influenced by different processing methods at wk 6 and 9（P＜0.10）. The molar proportion of butyrate for calves receiving SFMS starter diets was higher than that of EMS and GMS starter diets（P＜0.05）at wk 5 and *** papillae development characteristics expressed by papilla length,papilla width and rumen wall thickness were remarkably different among treatment starter diets（P＜0.05）.

关键词： calves processing maize grain full fat soyabean rumen development

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Transcriptomic analysis reveals the molecular mechanisms of rumen wall morphological and functional development induced by different solid diet introduction in a lamb model

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Journal of Animal Science and Biotechnology 2021年第3期12卷 1169-1183页

作者： Daming Sun Yuyang Yin Changzheng Guo Lixiang Liu Shengyong Mao Weiyun Zhu Junhua Liu Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health Laboratory of Gastrointestinal MicrobiologyCollege of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095Jiangsu ProvinceChina National Center for International Research on Animal Gut Nutrition Nanjing Agricultural UniversityNanjing 210095China National Experimental Teaching Demonstration Center of Animal Science Nanjing Agricultural UniversityNanjing 210095China Huzhou Academy of Agricultural Sciences Huzhou 313000China

Background:This study aimed to elucidate the molecular mechanisms of solid diet introduction initiating the cellular growth and maturation of rumen tissues and characterize the shared and unique biological processes upon different solid diet ***:Twenty-four Hu lambs were randomly allocated to three groups fed following diets:goat milk powder only(M,n=8),goat milk powder+alfalfa hay(MH,n=8),and goat milk powder+concentrate starter(MC,n=8).At 42 days of age,the lambs were *** fluid sample was collected for analysis of concentration of volatile fatty acid(VFA)and microbial crude protein(MCP).The sample of the rumen wall from the ventral sac was collected for analysis of rumen papilla morphology and ***:Compared with the M group,MH and MC group had a higher concentration of VFA,MCP,rumen weight,and rumen papilla *** transcriptomic results of rumen wall showed that there were 312 shared differentially expressed genes(DEGs)between in“MH vs.M”and“MC vs.M”,and 232 or 796 unique DEGs observed in“MH vs.M”or“MC vs.M”,*** shared DEGs were most enriched in VFA absorption and metabolism,such as peroxisome proliferator-activated receptor(PPAR)signaling pathway,butanoate metabolism,and synthesis and degradation of ketone ***,a weighted gene co-expression network analysis identified M16(2,052 genes)and M18(579 genes)modules were positively correlated with VFA and rumen wall *** M16 module was mainly related to metabolism pathway,while the M18 module was mainly associated with signaling ***,hay specifically depressed expression of genes involved in cytokine production,immune response,and immunocyte activation,and concentrate starter mainly altered nutrient transport and metabolism,especially ion transport,amino acid,and fatty acid ***:The energy production during VFA metabolism may drive the rumen wall development *** hay introduction facilitated est

关键词： Concentrate Hay Lamb rumen development Transcriptome

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