عنوان مقاله :
روند هم خوني در جمعيت گاوهاي هلشتاين ايران
عنوان به زبان ديگر :
Trend of lnbreeding in Iranian Holstein Population
پديد آورندگان :
توحيدي، رضا نويسنده دانشكده كشاورزي-دانشگاه تربيت مدرس tohidi, R , واعظ ترشيزي، رسول نويسنده دانشكده كشاورزي- دانشگاه تربيت مدرس- تهران VAEZ TORSHIZI, R. , مرادي شهربابك، محمد نويسنده پرديس كشاورزي و منابع طبيعي- دانشگاه تهران NEJATIJAVAREMI, A. , صيادنژاد، محمدباقر نويسنده مركز اصلاح نژاد دام كشور-كرج SAYYADNEJAD, M.R
اطلاعات موجودي :
فصلنامه سال 1387
كليدواژه :
ضريب هم خوني , روند هم خوني , ايران , Inbreeding coefficient , Inbreeding trend , Holstein cattle , گاوهلشتاين , IRAN
چكيده لاتين :
A pedigree file of382831 Holstein cows and bulls, collected from herds registered by
Animal Breeding Center of Iran during 1967 to 1999, was used to calculate the
inbreeding coefficient. The mean inbreeding coefficient for the whole population (male
and female). on a base year of 1946. was 0.184%. The means for cows (94 percent of the
whole population) and bulls (6 percent of the whole population) were 0.180% and
0.240%. respectively. Minimum inbreeding coefficient was zero, while the maximum
values were 39.844, 39.844, and 25.780 for the whole population, cows and bull
populations, respectively. In this population 9.5, percent of animals were inbred with a
mean inbreeding coefficient of 2.175%. The regression coefficients of inbreeding on year
for the whole population and for the population of cows were similar and positive
(0.021%). This regression was positive for bulls but higher than that for the population of
cows (0.026%).
عنوان نشريه :
علوم دامي ايران
عنوان نشريه :
علوم دامي ايران
اطلاعات موجودي :
فصلنامه با شماره پیاپی سال 1387
كلمات كليدي :
#تست#آزمون###امتحان