Estimates of Genetic Parameters for Direct and Maternal Effects with Six Different Models on Birth and Weaning Weights of Turkish Merino Lambs

Bülent EKİZ; Mustafa ÖZCAN; Alper YILMAZ

Makale detayları

Estimates of Genetic Parameters for Direct and Maternal Effects with Six Different Models on Birth and Weaning Weights of Turkish Merino Lambs

Yazarlar:

Bülent EKİZ | Mustafa ÖZCAN | Alper YILMAZ

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2004 Vol.28 Issue 2, pp.383-389

Belge Tipi:

Makale

Yayın Tarihi:

1/2004

Belge Dili:

Türkçe

Document ID (Org No.):

2000769610

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Anahtar kelimeler:

Özet:

 

The aim was to estimate the genetic parameters for birth and weaning weights of Turkish Merino lambs by separating direct genetic, maternal genetic and maternal permanent environmental effects. Data and pedigree information of the Turkish Merino sheep used in this study were collected at the Marmara Animal Breeding Research Institute from 1995 to 2001. Variance components for birth and weaning weights were estimated by the REML technique. Six different animal models were fitted by including or excluding maternal effects. Depending on the model, hd2 varied from 0.092 to 0.327 for birth weight and from 0.057 to 0.120 for weaning weight. Estimates of m2 ranged from 0.101 to 0.271 for birth weight and from 0 to 0.083 for weaning weight. The maternal permanent environmental effect was significant for both traits. When fitted in models, estimates of ram were high and negative for birth and weaning weights. In conclusion, maternal effects on birth and weaning weights of Turkish Merino lambs were significant and may be taken into consideration in any selection program on this breed.

 

The aim was to estimate the genetic parameters for birth and weaning weights of Turkish Merino lambs by separating direct genetic, maternal genetic and maternal permanent environmental effects. Data and pedigree information of the Turkish Merino sheep used in this study were collected at the Marmara Animal Breeding Research Institute from 1995 to 2001. Variance components for birth and weaning weights were estimated by the REML technique. Six different animal models were fitted by including or excluding maternal effects. Depending on the model, hd2 varied from 0.092 to 0.327 for birth weight and from 0.057 to 0.120 for weaning weight. Estimates of m2 ranged from 0.101 to 0.271 for birth weight and from 0 to 0.083 for weaning weight. The maternal permanent environmental effect was significant for both traits. When fitted in models, estimates of ram were high and negative for birth and weaning weights. In conclusion, maternal effects on birth and weaning weights of Turkish Merino lambs were significant and may be taken into consideration in any selection program on this breed.

Makale detayları

Estimates of Genetic Parameters for Direct and Maternal Effects with Six Different Models on Birth and Weaning Weights of Turkish Merino Lambs

Yazarlar: Bülent EKİZ | Mustafa ÖZCAN | Alper YILMAZ

Yayıncı: TUBITAK

Dergi: Turkish Journal of Veterinary and Animal Sciences 2004 Vol.28 Issue 2, pp.383-389

Belge Tipi: Makale

Yayın Tarihi: 1/2004

Belge Dili: Türkçe

Document ID (Org No.): 2000769610

Sıklık: İki Aylık

eISSN: 1303-6181

pISSN: 1300-0128

Turkish Merino lambs

genetic parameters

maternal effects

birth and weaning weights.

Sayı

Yazarlar:

Bülent EKİZ | Mustafa ÖZCAN | Alper YILMAZ

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2004 Vol.28 Issue 2, pp.383-389

Belge Tipi:

Makale

Yayın Tarihi:

1/2004

Belge Dili:

Türkçe

Document ID (Org No.):

2000769610

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128