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Estimation of genetic and phenotypic trends of 305-day milk yield for simmentals reared in Kazova state farm in Turkey [Kazova Tarim i̇şletmesinde yetiştirilen simentallerde 305 gün süt verimi yönünden genetik ve fenotipik yönelim]
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نویسنده
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ulutaş z. ,sezer m. ,saatci m. ,şahin a.
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منبع
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journal of the faculty of veterinary medicine, kafkas university - 2010 - دوره : 16 - شماره : 4 - صفحه:533 -536
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چکیده
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This study was conducted to estimate breeding values of 232 simmental cows for 305-day milk yield calved between 1990 to 2000. breeding values were obtained for animals by using individual animal model. although,phenotypic values of 305 day milk yield showed a smooth increasing trend in the examined period,genetic trend has not shown a substantial trend among the years,generally an irregular fluctuation was observed. it is concluded that there was not any standard selection programme in the evaluated simmental herd reared in kazova state farm.
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کلیدواژه
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Breeding value; Genetic trend; Milk yield; Simmental
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آدرس
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gaziosmanpaşa üniversitesi ziraat fakültesi,zootekni, Turkey, karamanoglu mehmetbey üniversitesi meslek yüksekokulu ev,deney hayvanlari yetiştiriciligi programi, Turkey, mehmet akif ersoy universitesi veteriner fakültesi,zootekni, Turkey, gaziosmanpaşa üniversitesi ziraat fakültesi,zootekni, Turkey
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Authors
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