پديد آورنده :
قلي زاده، سجاد
عنوان :
اثرات هم خوني بر صفات توليد مثلي گله هاي گاو شيري استان اصفهان
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
سيزده،66ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
سعيد انصاري مهياري، احمد رياسي
استاد مشاور :
محمد ركوعي، محمدعلي ادريس
توصيفگر ها :
ضريب هم خوني , افت ناشي از هم خوني , گاو هلشتاين
تاريخ نمايه سازي :
29/3/92
استاد داور :
علي صادقي سفيد مزگي، مهدي رحيم ملك
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Inbreeding effects on reproductive traits in dairy cattle herds in Isfahan province Sajad Gholizadeh s gholizadh@ag iut ac ir Date of Submission 1 23 2013 Department of Animal Science Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisors S Ansari mahyari A riasi s ansari@cc iut ac irAbstract In order to study the inbreeding effects the data from different periods of Holstein cows werecollected by Vahdat commpany in Isfahan in collaboration with Breeding Center of Iran during twentyone years 1368 to 1389 In addition pedigree information from 86 481 cattle was used for review of thecoefficient of inbreeding in herds of cattle in Isfahan province In about 14 69 15 09 and 18 30 ofthe animals had unknown father mother and parents respectively Base year population for this studywas taken in 1357 and the average inbreeding coefficient was 2 33 on base year population of 1357 asreference population The results showed that the high relatively estimate of inbreeding coefficient oftotal population was due to incomplete pedigree of many cows and close matings by the farmers In thepedigree 66 18 of the animals were inbred and their average inbreeding coefficient estimated about3 57 The inbreeding coefficient of the females 90 68 of total population and males 9 3 of totalpopulation in Isfahan were 2 33 and 2 35 respectively Age at first calving calving interval opendays and number of insemination during the years 1368 to 1388 were used to study rate of inbreedingdepression on the quantitative traits An animal model was used and inbreeding rate was included as acovariate effect Average of regression coefficient for age at the first calving calving interval number ofinsemination and open days were estimated for every 1 increasing in the inbreeding as 0 589 0 21 1 08 0 15 0 16 0 55 and 0 27 12 respectively The results indicated that the average inbreeding trendedto increase with the reproductive traits In general this study showed that different herds have beenrelated to the mating system and the mean of inbreeding coefficient has gone up due to the close matingsbetween the candidate parents Keywords Inbreeding rate inbreeding depression reproductive traits Holstein cows
استاد راهنما :
سعيد انصاري مهياري، احمد رياسي
استاد مشاور :
محمد ركوعي، محمدعلي ادريس
استاد داور :
علي صادقي سفيد مزگي، مهدي رحيم ملك
