西北高寒牧区不同湖羊杂交组合后代生长模型分析  

Growth model analysis of F_1 lambs of Hu sheep in the alpine region of northwest China

作　　者：梁新亮 王丽 谢云龙[1] 李万宏[1] 李发弟[1,2] 乐祥鹏 LIANG Xinliang;WANG Li;XIE Yunlong;LI Wanhong;LI Fadi;YUE Xiangpeng(State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, Gansu, China;Engineering Laboratory of Sheep Breeding andReproduction Biotechnology in Gansu Province, Minqin 733300, Gansu, China)

机构地区：[1]兰州大学草地农业生态系统国家重点实验室兰州大学农业农村部草牧业创新重点实验室兰州大学草地农业科技学院,甘肃兰州730020 [2]甘肃省肉羊繁育生物技术工程实验室,甘肃民勤733300

出　　处：《草业科学》2018年第12期3004-3012,共9页Pratacultural Science

基　　金：甘肃省重点研发计划(17YF1NA066);甘肃省科技重大专项计划(1602NKDH020);甘肃省农业科技创新项目(GNCX-2014-41);国家肉羊产业技术体系(CARS-38);长江学者创新团队发展计划资助(IRT13019)

摘　　要：本研究测定了在高寒地区舍饲条件下杜泊羊♂×湖羊♀(杜湖)、澳洲白羊♂×湖羊♀(澳湖)和特克塞尔羊♂×湖羊♀(特湖)3种不同杂交组合F1代羔羊早期生长性能,采用Gompertz模型和Logistic模型拟合了3种杂交组合F1代羔羊的早期生长过程,比较分析了3组杂交羔羊的生长观测值和模型估计值,进而评估其杂种优势。结果表明,两种模型拟合度(R2)都在0.980以上,Gompertz模型对生长拟合效果优于Logistic模型。杜湖和澳湖F1代的拐点日龄和拐点体重小于特湖组;杜湖F1、澳湖F11～3月龄公、母羔的累积生长极显著大于特湖F1公、母羔(P<0.01);特湖F1代从5月龄开始,公、母羔累积生长显著高于杜湖、澳湖F1代公、母羔(P<0.05),特湖F1代杂种优势显著。本研究通过分析不同公羊与湖羊杂交一代体重增长规律,为湖羊杂交一代在西北高寒牧区的科学饲养提供了理论依据。In this study,the sheep body weights of F1lambs of Dorper♂×Hu♀(DH),Australian white♂×Hu♀(AH),and Texel♂×Hu♀(TH)were measured at the early stage under dry-lot feeding conditions in a high-altitude and cold region,and then the Gompertz and Logistic models were used to match their early growth process.Meanwhile,the observed values of growth and values estimated by models were analyzed to evaluate the hybrid vigor.The results showed that the fitness of two models reached more than0.980,and the fitting effects of the Gompertz model in three hybrids were better than those of the Logistic model.The age of the growth inflection point and the inflection point weight of DH F1lambs and AH F1lambs were earlier and smaller,respectively,than those of TH F1lambs.The cumulative growth from1to3months of DH F1lambs and AH F1lambs was significantly greater(P<0.01)than that of TH F1lambs,but after5months of age,the cumulative growth of TH F1lambs was significantly greater(P<0.05)than that of DH F1lambs and AH F1lambs,indicating that TH F1lambs had greater hybrid vigor than the other hybrid lambs did.

关 键 词：澳洲白羊 杜泊羊 特克塞尔羊 生长性能 Logistic模型 Gompertz模型 参数估计 

分 类 号：S826.803.2[农业科学—畜牧学]