پديد آورنده :
مراديان، مهدي
عنوان :
ارزيابي برنامه هاي اصلاحي و تغييرات ژنتيكي صفات توليد شير در گله هاي گاو شيري اصفهان
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
ده،56ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
سعيد انصاري مهياري، محمدعلي ادريس
استاد مشاور :
غلامرضا قرباني، احمد رياسي
توصيفگر ها :
پارامترهاي ژنتيكي , شير توليدي , چربي , پروتئين , روند ژنتيكي
تاريخ نمايه سازي :
10/3/93
استاد داور :
محمد خوروش، قدرت اله سعيدي
چكيده انگليسي :
Evaluation of Breeding Schemes and Genetic Changes in Milk Production Traits in Dairy Cattle Herds in Isfahan Mehdi Moradian mehdi moradian @ag iut ac ir January 18 2014 Department of Animal Science Isfahan University of Technology Esfahan 84156 83111 IranDegree M Sc Language FarsiSaeid Ansari Mahyari s ansari@cc iut ac irAbstractThis study was carried out to investigate the factors affecting milk traits and estimate the geneticparameters of milk yielk fat yeild protein yield fat percent and protein percent Besides the genetictrends were estimated for milk production traits based on estimated breeding values Records of Holsteindairy cows during 1991 2011 were used from Vahdat Industrial Agriculturists and Dairymen Cooperativeof Isfahan All records have been prepared and edited and then normalization of data for all traits andnormal distribution of the residuals were evaluated The pedigree file was produced according to CFCsoftware Best linear unbiased prediction was used to predict the breeding values co variancecomponents and genetic parameters based on the single and multiple trait approaches The heritabilities ofmilk production protein and fat were 27 1 24 52 and 21 74 respectively Genotype andphenotypic correlations were estimated using restricted maximum likelihood and average of the two traitanimal models algorithm via AI REML method The genetic correlation for milk and fat was 0 93 formilk and protein 0 96 and for fat and protein 0 82 Animal breeding values versus the year of the birthwas showed that the annual genetic trend for milk fat and protein during 1991 2011 were 31 81 0 96 1 04 0 05 and 0 97 0 04 kg respectively According to the results it seems that genetic variation ofthe above traits in Isfahan Holstein dairy cows had suitable trend and the breeding schemes weresuccessfully incresed Keyword Genetic parameters Milk yield Fat Protein Genetic trends
استاد راهنما :
سعيد انصاري مهياري، محمدعلي ادريس
استاد مشاور :
غلامرضا قرباني، احمد رياسي
استاد داور :
محمد خوروش، قدرت اله سعيدي
