检索结果-南通市图书馆

Developing a genome-wide selection model for genetic improvement of residual feed intake and carcass merit in a beef cattle breeding program

引用

Chinese Science Bulletin 2012年第21期57卷 2741-2746页

作者： ZENG ZhiYao TANG Guo Qing MA JiDeng plastow graham MOORE Stephen LAI SongJia LI XueWei WANG ZhiQuan College of Animal Science and Technology Sichuan Agricultural UniversityYaan 625014China Department of Agricultural Food and Nutritional ScienceUniversity of AlbertaEdmontonAB T6G 2C8Canada College of Animal Science and Technology Heilongjiang August First Land Reclamation UniversityDaqing 163319China

Residual feed intake (RFI) and carcass merit (CM) are both complex traits emerging as critical targets for beef genetic *** and CM traits are difficult and expensive to measure and genetic improvement for these traits through traditional selection methods is not very ***,genome-wide selection using DNA markers may be a potential alternative for genetic improvement of these *** this study,the efficiency of a genome-wide selection model for genetic improvement of RFI and CM was *** Illumina Bovine50K bead chip was used to genotype 922 beef cattle from the Kinsella Beef Research Ranch of the University of Alberta.A Bayes model and multiple marker regression using a stepwise method were used to conduct the association *** number of significant SNP markers for carcass weight (CWT),carcass back fat (BF),carcass rib eye area (REA),carcass grade fat (GDF),lean meat yield (LMY),and residual feed intake (RFI) were 75,54,67,57,44 and 50,***-variate analysis of marker scores and phenotypes for all traits were made using DMU *** genetic parameter for each trait was *** genetic correlations of marker score and phenotype for CWT,BF,REA,GDF,LMY and RFI were 0.75,0.69,0.87,0.77,0.78,and 0.85,*** average prediction accuracies of phenotypic EBV for the six traits were increased by 0.05,0.16,0.24,0.23,0.17 and 0.19,*** results of this study indicated that the two-trait marker-assisted evaluation model used was a suitable alternative of genetic evaluation for these traits in beef cattle.

关键词：胴体品质遗传改良全基因组选择模型采食量育种计划肉牛剩余

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Genetic parameters of drinking and feeding traits of wean-to-finish pigs under a polymicrobial natural disease challenge

引用

Journal of Animal Science and Biotechnology 2022年第1期13卷 17-35页

作者： Jian Cheng Austin M.Putz John C.S.Harding Michael K.Dyck Frederic Fortin graham S.plastow Pig Gen Canada Jack C.M.Dekkers Department of Animal Science Iowa State UniversityAmesIA 50011USA Hendrix Genetics Swine Business UnitBoxmeerThe Netherlands 5831CK Department of Large Animal Clinical Science University of SaskatchewanSaskatoonSK S7N 5A2Canada Department of Agriculture Food and Nutritional ScienceUniversity of AlbertaEdmontonAB T6G 2R3Canada Centre de Developpement du Porc du Quebec Inc. Quebec City G1V 4M6Canada PigGen Canada Research Consortium GuelphOntario N1H4G8Canada

Background:The pork industry faces unprecedented challenges from disease,which increases cost of production and use of antibiotics,and reduces production efficiency,carcass quality,and animal *** solution is to improve the overall resilience of pigs to a broad array of common diseases through genetic *** changes in feeding and drinking are usually the very first clinical signs when animals are exposed to stressors such as *** in feeding and drinking behaviors in diseased pigs may reflect the way they cope with the challenge and,thus,could be used as indicator traits to select for disease *** objectives of this study were to estimate genetic parameters of feeding and drinking traits for wean-to-finish pigs in a natural polymicrobial disease challenge model,to estimate genetic correlations of feeding and drinking traits with growth rate and clinical disease traits,and to develop indicator traits to select for disease ***:In general,drinking traits had moderate to high estimates of heritability,especially average daily water dispensed,duration,and number of visits(0.44 to 0.58).Similar estimates were observed for corresponding feeding traits(0.35 to 0.51).Most genetic correlation estimates among drinking traits were moderate to high(0.30 to 0.92)and higher than among feeding traits(0 to 0.11).Compared to other drinking traits,water intake duration and number of visits had relatively stronger negative genetic correlation estimates with treatment rate and mortality,especially across the challenge nursery and finisher(−0.39 and−0.45 for treatment rate;−0.20 and−0.19 for mortality).Conclusion:Most of the recorded drinking and feeding traits under a severe disease challenge had moderate to high estimates of heritability,especially for feed or water intake duration and number of *** and genetic correlations among the recorded feeding traits under disease were generally low but drinking traits show

关键词： Disease resilience Feeding and drinking behavior Genetic parameters Pigs

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluating Breed Complementarity and Sexed Semen with Maternal Use of Afrikaner Germplasm

引用

Agricultural Sciences 2017年第7期8卷 507-517页

作者： Razie Khorshidi Michael D. MacNeil John J. Crowley Michiel M. Scholtz Annette Theunissen graham S. plastow Livestock Genetic Department of Agricultural Food and Nutritional Science University of Alberta Edmonton Canada Delta G Miles City USA ARC-Animal Production Institute Irene South Africa Department of Animal Wildlife and Grassland Sciences University of the Free State Bloemfontein South Africa Canadian Beef Breeds Council Calgary Canada Department of Agricultural Land Reform and Rural Development Jan Kempdorp South Africa

Livestock production impacts food security of developing countries, especially where efficiency of production is compromised by environmental stressors. In South Africa, breeding with indigenous Afrikaner cattle that are genetically well adapted to subtropical environments is considered an essential strategy for sustainable beef production. Today, there is a potential for farmers to participate in commercial systems that join adapted Afrikaner germplasm, used in a specialized maternal role, with exotic terminal sires to optimize production. The objective of this study was to assess productivity of five simulated production systems: 1) straightbred Afrikaner mated naturally, 2) a straight-bred Afrikaner cow herd with two sections;one section to produce replacement females and the other to cross with Charolais terminal sires, both using natural mating, 3) similar to 2, but applying sexed semen to produce replacement females, 4) similar to 2, but using a multi-breed composite dam line with a breed combination of 50% Afrikaner, 25% Hereford and 25% Simmental, and 5) similar to 4, but again applying sexed semen to produce replacement females. Parameter estimates needed to compare these systems were extracted from the scientific literature. Relative to straightbred Afrikaner dams, the simulated composite dams were more fit producing 7.8% more calves and their progeny performance was improved by reducing feed intake (-24.4%) and increasing meat production (+11.7%). The potential benefit of allocating more cows to the terminal sire was insufficient to offset the reduction in pregnancy rate that results with the use of sexed semen. Thus, system 4 had the greatest productivity (+23.1%) while requiring 22.8% less feed for finishing the progeny to be harvested relative to the purebred Afrikaner system. The combination of increased productivity and reduced feed requirement made use of a Charolais terminal sire in conjunction with multi-breed composite females bred by natural ser

关键词： Beef Production Afrikaner Composite Dams Sexed Semen Terminal Crossbreeding

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：