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Related Experiment Videos

Breeder age influences embryogenesis in broiler hatching eggs.

E D Peebles1, S M Doyle, C D Zumwalt

  • 1Department of Poultry Science, Mississippi State University, Mississippi State 39762, USA. dpeebles@poultry.msstate.edu

Poultry Science
|March 23, 2001
PubMed
Summary

Broiler breeder age significantly impacts egg and embryo development, affecting weight loss, yolk sac absorption, and embryo growth. Eggshell characteristics change with hen age, influencing embryonic development during incubation.

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Area of Science:

  • Poultry Science
  • Animal Nutrition
  • Embryology

Background:

  • Dietary fat and broiler breeder age are critical factors influencing reproductive efficiency and offspring development.
  • Understanding these effects is crucial for optimizing broiler production and hatchability.

Purpose of the Study:

  • To investigate the impact of dietary fat and broiler breeder age on egg and embryo characteristics during incubation.
  • To determine how changes in eggshell properties with breeder age affect yolk uptake and embryonic development.

Main Methods:

  • Broiler breeders were fed diets with varying fat content (poultry fat or corn oil) and energy levels.
  • Eggs were collected from hens at 27 and 36 weeks of age for incubation.
  • Egg weight loss, embryo weights (wet and dry), moisture content, eggshell weight, yolk sac weight, and liver weights were measured at various incubation stages.

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Main Results:

  • Dietary fat composition did not significantly affect egg or embryo characteristics.
  • Eggs from younger hens (27 weeks) exhibited higher eggshell weight and lower egg weight loss compared to older hens (36 weeks).
  • Embryos from younger hens showed higher dry weight and lower wet liver weight at Day 18, indicating differences in nutrient utilization and growth rates.

Conclusions:

  • Broiler breeder age, not dietary fat, significantly alters egg and embryo characteristics during incubation.
  • Changes in eggshell weight and composition with breeder age influence yolk sac absorption and embryonic growth.
  • These findings highlight the importance of breeder age management for optimizing embryo development and hatchling quality.