University of Worcester Worcester Research and Publications
 
  USER PANEL:
  ABOUT THE COLLECTION:
  CONTACT DETAILS:

Genetic Parameters for Eggshell Traits in Ostriches

Brand, Z and Cloete, S.W.P. and Malecki, I.A. and Brown, Chris (2012) Genetic Parameters for Eggshell Traits in Ostriches. British Poultry Science, 53 (3). pp. 316-324. ISSN 0007-1668

[img] PDF
Brand_et_al_2012_-_Genetic_parameters_for_eggshell_traits_in_ostriches.pdf - Published Version
Restricted to Repository staff only

Download (310Kb) | Request a copy

Abstract

1. A study was conducted on 14000 ostrich eggs to estimate genetic parameters for eggshell traits that could benefit the hatchability of ostrich eggs. Traits measured included the number of pores on the eggshell, the average diameter of these pores, the total area of pores on the eggshell, permeability (pore area/shell thickness) and eggshell thickness. 2. Heritability estimates ranged from 016 for total pore area to 041 for the natural logarithm of pore count. The heritability estimates for water loss on 21 and 35 d (WL21 and WL35) of incubation were high at 023 and 024, respectively. 3. On a genetic level, pore count was negatively correlated with average pore diameter (073) and shell thickness (028), whereas it was positively correlated with total pore area (058), WL21 (024) and WL35 (034). The direct and maternal genetic correlations of pore count with total pore area (058) and permeability (059) were high and significant. Permeability was positively correlated to WL21 and WL35, both on the direct and maternal genetic levels. 4. The estimated genetic parameters indicate that it should be possible to select for the various eggshell traits in ostrich eggs, or for permeability and water loss. However, as a trait with an intermediate optimum, direct selection for permeability and other eggshell traits would not be straightforward, and the possible application of these results to improve hatchability of ostrich eggs in the future needs consideration.

Item Type: Article
Additional Information:

The electronic full-text cannot be supplied for this item. Please check availability with your local library or Interlibrary Requests Service.

Uncontrolled Keywords: eggshell traits, genetic parameters, ostriches
Subjects: S Agriculture > S Agriculture (General)
Q Science > QH Natural history > QH301 Biology
Divisions: Academic Departments > Institute of Science and the Environment
Depositing User: Chris Brown
Date Deposited: 21 Sep 2012 11:03
Last Modified: 16 Nov 2012 06:00
URI: https://eprints.worc.ac.uk/id/eprint/1667

Actions (login required)

View Item View Item
 
     
Worcester Research and Publications is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.