Effect of Environmental Factors on Preweaning Growth Traits of Morkaraman Lambs

Year 2023, Volume: 8 Issue: 4, 651 - 657, 31.12.2023

Ferda Karakuş

https://doi.org/10.35229/jaes.1362722

Abstract

The aim of this study was to analyze the environmental factors impacting preweaning growth traits in Morkaraman herds and to categorize weaning weight using the Gaussian mixture regression model. The mean live weights of lambs at birth, 60th, and 90th day (weaning) were determined to be 3.97 kg, 17.94 kg, and 24.92 kg, respectively. The effect of lambing years on live weights at all ages was found to be quite significant (p<0.001). The effect of dam age on birth (p<0.01), 60th day (p<0.001), and weaning weight (p<0.001) was also highly significant. Male lambs were superior to females in terms of birth weight (p<0.001), 60th day (p<0.01), and weaning weight (p<0.001). Birth type was only found to have a significant effect on birth weight (p<0.001). Additionally, it was determined that the weaning weights could be categorized according to districts using the Gaussian mixture regression model. As a result, knowing the effects of environmental factors on the growth traits of lambs, which are effective in the emergence of genetic potential, can provide important contributions to the strategies of breeding and management.

Keywords

Morkaraman, lamb, growth traits

Thanks

The data used in this study were obtained within the scope of Morkaraman breed sheep breeding sub-project. I would like to thank the Republic of Türkiye Ministry of Agriculture and Forestry General Directorate of Agricultural Research and Policies for their support in the project.

Morkaraman Kuzularının Sütten Kesim Öncesi Büyüme Özellikleri Üzerine Çevresel Faktörlerin Etkisi

Abstract

Bu çalışmanın amacı, Morkaraman sürülerinde sütten kesim öncesi büyüme özelliklerini etkileyen çevresel faktörleri incelemek ve Gauss karışım regresyon modelini kullanarak sütten kesim ağırlığını kategorize etmektir. Kuzuların doğum, 60. ve 90. gün (sütten kesim) ortalama canlı ağırlıkları sırasıyla 3.97 kg, 17.94 kg ve 24.92 kg olarak belirlendi. Kuzulama yılının tüm yaşlardaki canlı ağırlıklar üzerindeki etkisi oldukça önemli bulundu (p<0.001). Ana yaşının doğum (p<0.01), 60. gün (p<0.001) ve sütten kesim ağırlığı (p<0.001) üzerindeki etkisi de oldukça önemliydi. Erkek kuzular doğum ağırlığı (p<0.001), 60. gün (p<0.01) ve sütten kesim ağırlığı (p<0.001) bakımından dişilerden daha üstündü. Doğum tipinin yalnızca doğum ağırlığı üzerinde anlamlı bir etkisi bulundu (p<0.001). Ayrıca, Gauss karışım regresyon modeli kullanılarak sütten kesim ağırlıklarının ilçelere göre kategorize edilebileceği belirlendi. Sonuç olarak, genetik potansiyelin ortaya çıkmasında etkili olan çevresel faktörlerin kuzuların büyüme özellikleri üzerindeki etkilerinin bilinmesi, ıslah ve yönetim stratejilerine önemli katkılar sağlayabilir.

Keywords

Morkaraman, kuzu, büyüme özellikleri

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