Growth rate and feed intake of selected and nonselected broilers

Area of Science:

• Animal Science
• Poultry Science
• Avian Biology

Background:

• Broiler growth and feed intake are critical for efficient meat production.
• Selective breeding aims to enhance desirable traits in broiler chickens.
• Understanding the interplay between genetics and nutrition is key to optimizing broiler performance.

Purpose of the Study:

• To compare the relative growth rates and feed intake patterns of selected and nonselected broiler populations.
• To investigate the influence of feed intake on broiler growth across different developmental stages.
• To assess feed efficiency differences between selected and nonselected broiler groups.

Main Methods:

• Conducting three comparative trials with selected and nonselected broiler populations.
• Monitoring and recording relative growth rates at weekly intervals.
• Analyzing feed intake patterns and calculating body weight deviations.

Main Results:

• Selected broilers exhibited approximately double the relative growth rate of nonselected broilers in week 1.
• Growth rate similarities were observed between selected and nonselected populations by week 4.
• Feed intake deviations were greater than body weight deviations in week 1.
• Feed intake significantly influenced growth rates from 3 to 8 weeks of age.
• Selected populations demonstrated superior feed efficiency from 0 to 4 weeks, with no significant difference from 4 to 8 weeks.

Conclusions:

• Selective breeding initially accelerates broiler growth but requires careful management of feed intake.
• Feed intake is a primary driver of growth rate in both selected and nonselected broilers.
• Early-life feed efficiency advantages in selected broilers may not persist into later growth stages.