Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs

ceyhan, ayhan; YILMAZ, Alper; Ekiz, Bulent; Özcan, Mustafa

Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs

Bülent EKİZ, (İstanbul Üniversitesi, Veteriner Fakültesi, İstanbul Türkiye)

Mustafa ÖZCAN, (Girilmedi)

Alper YILMAZ, (Girilmedi)

Ayhan CEYHAN (Girilmedi)

Turkish Journal of Veterinary and Animal Sciences

5 0

Yıl: 2004 Cilt: 28 Sayı: 2 Sayfa Aralığı: 383 - 389 Metin Dili: Türkçe İndeks Tarihi: 29-07-2022

Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs

Öz:

Bu araştırmada, Türk Merinosu kuzuların doğum ve sütten kesim ağırlıkları için genetik parametrelerin direkt genetik, anaya bağlı genetik ve anaya bağlı kalıcı çevresel etki şeklinde unsurlara ayrılarak tahmin edilmesi amaçlanmıştır. Bu araştırmada kullanılan Türk Merinosu koyunlara ait veri ve pedigri bilgileri 1995-2001 yılları arasında Marmara Hayvancılık Araştırma Enstitüsü'nde toplanmıştır. Doğum ve sütten kesim ağırlıkları için varyans unsurları REML tekniği ile tahmin edilmiştir. Anaya bağlı etkileri içerip içermemesine göre altı değişik model uyarlanmıştır. Modele bağlı olarak $h_d^2$, doğum ağırlığı için 0,092 ile 0,327; sütten kesim ağırlığı için 0,057 ile 0,120 arasında değişmiştir, m2 tahmini ise doğum ağırlığı için 0,101 ile 0,271; sütten kesim ağırlığı için O ile 0,083 arasında yer almıştır. Anaya bağlı kalıcı çevresel etki her iki özellik için de önemli bulunmuştur. Modele uyarlandığında, $r_{am}$ doğum ve sütten kesim ağırlığı için yüksek ve negatif olarak tahmin edilmiştir. Sonuç olarak, maternal etkilerin Türk Merinosu kuzuların doğum ve sütten kesim ağırlıkları üzerinde etkisi önemli bulunmuş ve bu ırk için yapılacak seleksiyon programlarında maternal etkilerin de dikkate alınması tavsiye edilmiştir.

Anahtar Kelime: hayvan ıslahı doğum ağırlığı Türk Merinosu seleksiyon ıslahı damızlık değeri analık etkisi kuzu sütten kesim koyun sütten kesim ağırlığı genetik parametreler

Konular: Ziraat Mühendisliği

Türk Merinosu kuzuların doğum ve sütten kesim ağırlıklarına ait direkt ve anaya bağlı etkiler için altı farklı model ile genetik parametre tahminleri

Öz:

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, $h_d^2$ 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 $r_{am}$ 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.

Anahtar Kelime: breeding value maternal effects lambs weaning sheep weaning weight genetic parameters animal breeding birth weight Turkish Merino selective breeding

Konular: Ziraat Mühendisliği

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	Ekiz B, Özcan M, YILMAZ A, ceyhan a (2004). Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. , 383 - 389.
Chicago	Ekiz Bulent,Özcan Mustafa,YILMAZ Alper,ceyhan ayhan Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. (2004): 383 - 389.
MLA	Ekiz Bulent,Özcan Mustafa,YILMAZ Alper,ceyhan ayhan Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. , 2004, ss.383 - 389.
AMA	Ekiz B,Özcan M,YILMAZ A,ceyhan a Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. . 2004; 383 - 389.
Vancouver	Ekiz B,Özcan M,YILMAZ A,ceyhan a Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. . 2004; 383 - 389.
IEEE	Ekiz B,Özcan M,YILMAZ A,ceyhan a "Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs." , ss.383 - 389, 2004.
ISNAD	Ekiz, Bulent vd. "Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs". (2004), 383-389.

APA	Ekiz B, Özcan M, YILMAZ A, ceyhan a (2004). Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. Turkish Journal of Veterinary and Animal Sciences, 28(2), 383 - 389.
Chicago	Ekiz Bulent,Özcan Mustafa,YILMAZ Alper,ceyhan ayhan Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. Turkish Journal of Veterinary and Animal Sciences 28, no.2 (2004): 383 - 389.
MLA	Ekiz Bulent,Özcan Mustafa,YILMAZ Alper,ceyhan ayhan Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. Turkish Journal of Veterinary and Animal Sciences, vol.28, no.2, 2004, ss.383 - 389.
AMA	Ekiz B,Özcan M,YILMAZ A,ceyhan a Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. Turkish Journal of Veterinary and Animal Sciences. 2004; 28(2): 383 - 389.
Vancouver	Ekiz B,Özcan M,YILMAZ A,ceyhan a Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs. Turkish Journal of Veterinary and Animal Sciences. 2004; 28(2): 383 - 389.
IEEE	Ekiz B,Özcan M,YILMAZ A,ceyhan a "Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs." Turkish Journal of Veterinary and Animal Sciences, 28, ss.383 - 389, 2004.
ISNAD	Ekiz, Bulent vd. "Estimates of genetic parameters for direct and maternal effects with six different models on birth and weaning weights of Turkish Merino lambs". Turkish Journal of Veterinary and Animal Sciences 28/2 (2004), 383-389.