Sources of Variation and Repeatability for Litter Size, Body Weight and Matured Performance of Awassi Ewes

S.I. SAID; M.M. MUWALLA; J.P. HANRAHAN

Makale detayları

Sources of Variation and Repeatability for Litter Size, Body Weight and Matured Performance of Awassi Ewes

Yazarlar:

S.I. SAID | M.M. MUWALLA | J.P. HANRAHAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 1999 Vol.23 Issue 5, pp.461-466

Belge Tipi:

Makale

Yayın Tarihi:

4/1999

Belge Dili:

Türkçe

Document ID (Org No.):

2000771884

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Anahtar kelimeler:

Özet:

 

The objectives of this study were to investigate the environmental factors influencing litter size and postpartum ewe live  weight and to estimate the repeatability for these traits and for pre-weaning growth rate in Awassi breed. Least squares means for  litter size and ewe body weight were 1.08 and 57.6 kg, respectively. Repeatability estimated by the intraclass correlation method  was 0.03, 0.46 and 0.26 for litter size, ewe body weight and pre-weaning growth rate, respectively. Year-month and age of ewe  showed highly significant effect on all the traits. It was concluded that selection for litter size should be based not only on ewe  performance but also on that of female relatives. The moderate repeatability estimate for pre-weaning growth rate of progeny  suggested that an appreciable rate of genetic response in lamb weights could be achieved through selection.

 

The objectives of this study were to investigate the environmental factors influencing litter size and postpartum ewe live  weight and to estimate the repeatability for these traits and for pre-weaning growth rate in Awassi breed. Least squares means for  litter size and ewe body weight were 1.08 and 57.6 kg, respectively. Repeatability estimated by the intraclass correlation method  was 0.03, 0.46 and 0.26 for litter size, ewe body weight and pre-weaning growth rate, respectively. Year-month and age of ewe  showed highly significant effect on all the traits. It was concluded that selection for litter size should be based not only on ewe  performance but also on that of female relatives. The moderate repeatability estimate for pre-weaning growth rate of progeny  suggested that an appreciable rate of genetic response in lamb weights could be achieved through selection.

Makale detayları

Sources of Variation and Repeatability for Litter Size, Body Weight and Matured Performance of Awassi Ewes

Yazarlar:

S.I. SAID | M.M. MUWALLA | J.P. HANRAHAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 1999 Vol.23 Issue 5, pp.461-466

Belge Tipi:

Makale

Yayın Tarihi:

4/1999

Belge Dili:

Türkçe

Document ID (Org No.):

2000771884

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Awassi

Repeatability

Litter size

Sayı

Makale detayları

Sources of Variation and Repeatability for Litter Size, Body Weight and Matured Performance of Awassi Ewes

Yazarlar: S.I. SAID | M.M. MUWALLA | J.P. HANRAHAN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Veterinary and Animal Sciences 1999 Vol.23 Issue 5, pp.461-466

Belge Tipi: Makale

Yayın Tarihi: 4/1999

Belge Dili: Türkçe

Document ID (Org No.): 2000771884

Sıklık: İki Aylık

eISSN: 1303-6181

pISSN: 1300-0128

Awassi

Repeatability

Litter size

Sayı

Yazarlar:

S.I. SAID | M.M. MUWALLA | J.P. HANRAHAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 1999 Vol.23 Issue 5, pp.461-466

Belge Tipi:

Makale

Yayın Tarihi:

4/1999

Belge Dili:

Türkçe

Document ID (Org No.):

2000771884

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128