Journal
MEAT SCIENCE
Volume 141, Issue -, Pages 91-93Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2018.03.023
Keywords
Heritability; Tenderness; Sensory; Panellists
Categories
Funding
- Research Stimulus Fund (BreedQuality) [11/SF/311]
- Meat Technology Ireland (MTI) [TC 2016 002]
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The objective of the present study was to quantify, using simulated data, the impact on estimated heritability of varying the number of panellists and their inter-correlations using meat sensory tenderness in cattle as an example. Estimated parameters from actual sensory-based tenderness scores from 9 individual panellists on 1252 beef cattle were used to parameterise the simulation. A single tenderness score for each of 10 panellists was simulated for 15,000 cattle. Heritability estimates were calculated for each of the 10 panellists individually as well as the mean score per animal for all n combinations of panellists. Heritability estimates improved with increasing number of panellists in line with expectations from a deterministic equation. The increase in heritability was due to a reduction in the residual variance, albeit the rate of reduction in residual variance declined with each additional panellist included in the calculated mean tenderness score. Results highlight the importance of reporting the number of panellist scores per animal as well as their inter-correlations in sensory based studies.
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