TY  - JOUR
T1  - Evaluating the Relationship Between Mature Age Milk Yield and Several Traits Using CHAID Analysis in Brown Swiss Cows
AU - , Galip Bakir AU - , Siddik Keskin AU - , Hamit Mirtagioglu 
JO  - Journal of Animal and Veterinary Advances
VL  - 8
IS  - 3
SP  - 587
EP  - 589
PY  - 2009
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2009.587.589
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2009.587.589
KW  - CHAID
KW  -chi-square (χ2)
KW  -node
KW  -mature age milk yield
KW  -cow
KW  -lactation
AB  - Milk yield is important in breeding studies because it is one of the economically important traits. Therefore, determining the relationship between milk yield and some other traits could provide some important easiness in animal breeding studies. In this study, the aim was to evaluate the relationship between mature age milk yield and 9 independent variables (cow age, first mating age, lactation order, lactation period, dry period, first calving age, calving season, birth type and sex of calf) using CHAID analysis. Seven hundred and seventy Brown Swiss animals’ records (from 1987-1997) taken from Mus State Production Farm (in Turkey) were utilized. CHAID analysis results showed that lactation period was primary, sex of calf and cow age were secondary and first mating age and dry period were the tertiary variables affecting mature age milk yield.
ER  -