Phenotypic characterisation of Meatmaster sheep using quantitative and qualitative trait analysis

Area of Science:

• Animal Science
• Genetics
• Reproductive Biology

Background:

• The Meatmaster breed is a significant component of livestock populations, necessitating detailed characterization for genetic improvement and breeding programs.
• Understanding the phenotypic traits and reproductive efficiencies of the Meatmaster breed is crucial for optimizing production systems.

Purpose of the Study:

• To conduct a comprehensive phenotypic analysis of the Meatmaster sheep breed.
• To evaluate linear body measurements, qualitative traits, slaughter data, and pedigree performance.
• To identify correlations between physical characteristics and reproductive outcomes.

Main Methods:

• Collected linear body measurements and pedigree data from 187 rams and 222 ewes.
• Analyzed slaughter data from 2251 animals across different genders and ages.
• Utilized statistical analysis to determine means, standard deviations, and predictive values (R²).

Main Results:

• Recorded mean body weights, various body measurements (e.g., chest girth, wither height), and scrotal circumference for rams and ewes.
• Documented reproductive performance metrics including age at first lambing, lambing frequency, litter size, and weaning rates.
• Slaughter data indicated mean carcass weights for different grades (A, AB, B, C).
• Found significant correlations (R²=0.140 and R²=0.154) between wither height and average inter-lambing period/number of lambs born, respectively.

Conclusions:

• The Meatmaster breed exhibits distinct phenotypic characteristics and reproductive capabilities.
• A higher wither height is associated with improved reproductive traits, such as increased litter size and frequency, aligning with characteristics of Afro-type breeds.
• These findings provide valuable data for breeding strategies aimed at enhancing Meatmaster sheep productivity.