Genetic Parameter Estimations for Persistence of Milk Yield with Different Function Definition in Dairy Cattle

Serhat ARSLAN; Hamit MİRTAGHİZADEH

Makale detayları

Genetic Parameter Estimations for Persistence of Milk Yield with Different Function Definition in Dairy Cattle

Yazarlar:

Serhat ARSLAN | Hamit MİRTAGHİZADEH

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2004 Vol.28 Issue 1, pp.225-231

Belge Tipi:

Makale

Yayın Tarihi:

12/2003

Belge Dili:

Türkçe

Document ID (Org No.):

2000769717

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Anahtar kelimeler:

Özet:

 

A data set containing 2-year test day milk yield records was used. Random regression model solutions established with a covariance function (CF) approach was used. Persistence and lactation curve explanation performances of polynomial, Wilmink and Ali-Schaeffer curve definitions were compared for CF. When comparisons were made for R2 values, polynomial (0.9835) definition headed the list, followed by the Ali-Schaeffer curve (0.9534), and Wilmink curve (0.6023) definitions. Among the persistence predictions in respect of lactation orders, the Ali-Schaeffer curve provided predictions with the minimum variance, followed by the Wilmink and polynomial curve approaches. All of the curve definitions were in accord with the literature.

 

A data set containing 2-year test day milk yield records was used. Random regression model solutions established with a covariance function (CF) approach was used. Persistence and lactation curve explanation performances of polynomial, Wilmink and Ali-Schaeffer curve definitions were compared for CF. When comparisons were made for R2 values, polynomial (0.9835) definition headed the list, followed by the Ali-Schaeffer curve (0.9534), and Wilmink curve (0.6023) definitions. Among the persistence predictions in respect of lactation orders, the Ali-Schaeffer curve provided predictions with the minimum variance, followed by the Wilmink and polynomial curve approaches. All of the curve definitions were in accord with the literature.

Makale detayları

Genetic Parameter Estimations for Persistence of Milk Yield with Different Function Definition in Dairy Cattle

Yazarlar:

Serhat ARSLAN | Hamit MİRTAGHİZADEH

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2004 Vol.28 Issue 1, pp.225-231

Belge Tipi:

Makale

Yayın Tarihi:

12/2003

Belge Dili:

Türkçe

Document ID (Org No.):

2000769717

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Test-day model

covariance function

random regression

Sayı

Makale detayları

Genetic Parameter Estimations for Persistence of Milk Yield with Different Function Definition in Dairy Cattle

Yazarlar: Serhat ARSLAN | Hamit MİRTAGHİZADEH

Yayıncı: TUBITAK

Dergi: Turkish Journal of Veterinary and Animal Sciences 2004 Vol.28 Issue 1, pp.225-231

Belge Tipi: Makale

Yayın Tarihi: 12/2003

Belge Dili: Türkçe

Document ID (Org No.): 2000769717

Sıklık: İki Aylık

eISSN: 1303-6181

pISSN: 1300-0128

Test-day model

covariance function

random regression

Sayı

Yazarlar:

Serhat ARSLAN | Hamit MİRTAGHİZADEH

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2004 Vol.28 Issue 1, pp.225-231

Belge Tipi:

Makale

Yayın Tarihi:

12/2003

Belge Dili:

Türkçe

Document ID (Org No.):

2000769717

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128