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Genetic parameters for eggshell traits in ostriches.

Z Brand1, S W P Cloete, I A Malecki

  • 1Department of Animal Sciences, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa. zanellb@elsenburg.com

British Poultry Science
|September 18, 2012
PubMed
Summary

This study analyzed ostrich eggshell traits in ~14,000 eggs. Genetic parameters suggest selection for traits like pore count and permeability can improve ostrich egg hatchability.

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Area of Science:

  • Animal Genetics
  • Avian Reproduction
  • Quantitative Genetics

Background:

  • Ostrich egg hatchability is crucial for commercial viability.
  • Eggshell traits significantly influence incubation success.
  • Understanding genetic parameters of eggshell traits is key for improvement.

Purpose of the Study:

  • To estimate genetic parameters for key ostrich eggshell traits.
  • To assess the potential for genetic selection to enhance eggshell characteristics.
  • To investigate the relationship between eggshell traits and water loss during incubation.

Main Methods:

  • Analysis of approximately 14,000 ostrich eggs.
  • Measurement of eggshell traits: pore count, pore diameter, total pore area, permeability, and shell thickness.
  • Estimation of heritability and genetic correlations between traits.

Main Results:

  • Heritability estimates ranged from 0.16 (total pore area) to 0.41 (pore count).
  • Significant genetic correlations were found between pore count, pore size, pore area, and permeability.
  • High heritability for water loss at 21 and 35 days of incubation (0.23 and 0.24).

Conclusions:

  • Genetic selection for specific eggshell traits, permeability, and water loss is feasible in ostriches.
  • Selection for permeability requires careful consideration due to its nature as an intermediate optimum trait.
  • These findings offer potential pathways to improve ostrich egg hatchability through genetic strategies.