+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Estimation of genetic (co)variances of Gompertz growth function parameters in pigs



Estimation of genetic (co)variances of Gompertz growth function parameters in pigs



Journal of Animal Breeding and Genetics 134(2): 136-143



The objective of this study was to estimate genetic (co)variances for the Gompertz growth function parameters, asymptotic mature weight (A), the ratio of mature weight to birthweight (B) and rate of maturation (k), using alternative modelling approaches. The data set consisted of 51 893 live weight records from 10 201 growing pigs. The growth of each pig was modelled using the Gompertz model employing either a two-step fixed effect or mixed model approach or a one-step mixed model approach using restricted maximum likelihood for the estimation of genetic (co)variance. Heritability estimates for the Gompertz growth function parameters, A (0.40), B (0.69) and k (0.45), were greatest for the one-step approach, compared with the two-step fixed effects approach, A (0.10), B (0.33) and k (0.13), and the two-step mixed model approach, A (0.17), B (0.32) and k (0.18). Inferred genetic correlations (i.e. correlations of estimated breeding values) between growth function parameters within models ranged from -0.78 to 0.76, and across models ranged from 0.28 to 0.73 for parameter A, 0.75 to 0.88 for parameter B and 0.09 to 0.37 for parameter k. Correlations between predicted daily sire live weights based on the Gompertz growth curve parameters' estimated breeding values from 60 to 200 days of age between all three modelled approaches were moderately to strongly correlated (0.75 to 0.95). Results from this study provide heritability estimates for biologically interpretable parameters of pig growth through the quantification of genetic (co)variances, thereby facilitating the estimation of breeding values for inclusion in breeding objectives to aid in breeding and selection decisions.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 057799352

Download citation: RISBibTeXText

PMID: 27625008

DOI: 10.1111/jbg.12237


Related references

Genetic (co)variances and breeding value estimation for pigs gompertz growth curve parameters. Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006: 06-04, 2006

Genetic (co)variances and breeding value estimation of Gompertz growth curve parameters in Finnish Yorkshire boars, gilts and barrows. Journal of Animal Breeding and Genetics 125(3): 168-175, 2008

Estimation of genetic parameters for growth traits in Baluchi sheep using Gompertz growth curve function. Indian Journal of Animal Sciences 82(8): 889-892, 2012

On semigraphic estimation of parameters of Gompertz function and its application on fish growth. Acta Adriatica, 211: 227-236, 1980

Semi graphic estimation of parameters of gompertz function and its application on fish growth. Acta Adriatica 21(1): 227-236, 1980

The estimation of genetic parameters for growth curve traits in Raeini Cashmere goat described by Gompertz model. Small Ruminant Research 165: 66-70, 2018

Analysis of growth in the oil palm. II. Estimation of genetic variances of growth parameters and yield of fruit bunches. Euphytica 21(2): 257-264, 1972

Estimation of genetic parameters, genetic trends, and growth curve parameters of pigs selected for residual feed intake using quantile regression. Journal of Animal Science 95: 15-16, 2017

Maximum-Likelihood Estimation of the Parameters of the Gompertz Survival Function. Journal of the Royal Statistical Society: Series C 19(2): 152-159, 1970

Estimation of growth parameters using a nonlinear mixed Gompertz model. Poultry Science 83(6): 847-852, 2004

Time trends of Gompertz growth parameters in 'meat-type' pigs. Animal Science 70(1): 39-49, 2000

Estimation of seasonal growth parameters using a stochastic Gompertz model for tagging data. Journal of Shellfish Research 17(3): 833-838, 1998

Estimation of vaginal probiotic lactobacilli growth parameters with the application of the Gompertz model. Canadian Journal of Microbiology 48(1): 82-92, 2002

Effect of sex and season of birth on Gompertz growth curve parameters in Nero di Parma pigs. Italian Journal of Animal Science 8(4): 719-726, 2009

Estimation of sampling variances of moment-type estimates of genetic parameters. Bulletin of Animal Health and Production in Africa 36(2): 112-119, 1988