An On-Station Analysis of Factors Affecting Growth Traits of Pure Red Maasai and Dorper Sheep Breeds under an Extensive Production System

Author:

Wanjala GeorgeORCID,Kichamu Nelly,Cziszter Ludovic TomaORCID,Astuti Putri KusumaORCID,Kusza SzilviaORCID

Abstract

This comparative study aimed to evaluate genetic and environmental factors’ effects on the growth traits of lambs in Dorper and Red Maasai (RedM) sheep breeds. The data analyzed contained the following measurements: birth weight (Bwt), weaning weight (Wwt), yearling weight (Ywt), birth type (single or twins), and details on each lamb’s dam (dam ID and age) and sire. Except for the RedM, whose birth weight decreased with time, both breeds generally showed an increase in other growth weights across the study period, with yearly variations affecting both breeds. Additionally, analysis by a linear mixed model with restricted maximum likelihood (REML) showed that only breed as a factor significantly (p < 0.05) influenced birth weight; breed, sex, and birth type all significantly (p < 0.05) influenced weaning weight, whereas season, sex, and dam age significantly (p < 0.05) influenced yearling weight. The RedM breed outperformed the Dorper breed in post-weaning growth rate, demonstrating early resilience and adaptation to local environmental factors independent of maternal influence. Breed and non-genetic factors play a vital role in the growth of lambs, and the results of this study offer an opportunity for improved farm management under an extensive production system and selection for the conservation of the indigenous Red Maasai breed.

Publisher

MDPI AG

Subject

General Veterinary,Animal Science and Zoology

Reference39 articles.

1. Statista (2022, June 30). Value of Marketed Production of Goats and Sheeps in Kenya from 2016 to 2020. Available online: https://www.statista.com/.

2. Faostat (2022, June 30). Food and Agriculture Organization of the United Nations. Available online: http://www.fao.org/faostat/.

3. Small ruminant production in smallholder and pastoral/extensive farming systems in Kenya;Kosgey;Small Rumin. Res.,2008

4. Genetic parameters and genetic trends for growth traits of the Red Maasai sheep and its crosses to Dorper sheep under extensive production system in Kenya;Oyieng;Small Rumin. Res.,2022

5. Live weight, conformation, carcass traits and economic values of ram lambs of Red Maasai and Dorper sheep and their crosses;Ojango;Trop. Anim. Health Prod.,2017

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