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Titolo:
MULTIVARIATE RESTRICTED MAXIMUM-LIKELIHOOD-ESTIMATION OF GENETIC-PARAMETERS FOR GROWTH, CARCASS AND MEAT QUALITY TRAITS IN FRENCH LARGE WHITE AND FRENCH LANDRACE PIGS
Autore:
DUCOS A; BIDANEL JP; DUCROCQ V; BOICHARD D; GROENEVELD E;
Indirizzi:
INRA,GENET QUANTITAT & APPL STN,CTR RECH JOUY EN JOSAS F-78352 JOUY EN JOSAS FRANCE IAHAB,FED RES CTR W-3057 NEUSTADT 1 GERMANY
Titolo Testata:
Genetics selection evolution
fascicolo: 5, volume: 25, anno: 1993,
pagine: 475 - 493
SICI:
0999-193X(1993)25:5<475:MRMOG>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHENOTYPIC PARAMETERS; RESIDUAL VARIANCES; BREEDING VALUE; SELECTION; SWINE; PERFORMANCE; PREDICTION; MODELS;
Keywords:
PIG; GENETIC PARAMETER; RESTRICTED MAXIMUM LIKELIHOOD; GROWTH; CARCASS; MEAT QUALITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
57
Recensione:
Indirizzi per estratti:
Citazione:
A. Ducos et al., "MULTIVARIATE RESTRICTED MAXIMUM-LIKELIHOOD-ESTIMATION OF GENETIC-PARAMETERS FOR GROWTH, CARCASS AND MEAT QUALITY TRAITS IN FRENCH LARGE WHITE AND FRENCH LANDRACE PIGS", Genetics selection evolution, 25(5), 1993, pp. 475-493

Abstract

Genetic parameters of 7 traits measured in central test stations - average daily gain (ADG1), feed conversion ratio (FCR) and backfat thickness (ABT) measured on candidates for selection, and average daily gain (ADG2), dressing percentage (DP), estimated carcass lean content (ECLC) and meat quality index (MQI) measured in slaughtered relatives - were estimated for the Large White (LW) and French Landrace (LR) breedsusing a derivative free restricted maximum likelihood (DF-REML) procedure applied to a multiple trait individual animal model. The data consisted of 2 sets of records (3 671 and 3 630 candidates, 3 039 and 2 695 slaughtered animals in, respectively, LW and LR breeds) collected at 3 different stations from 1985-1990 (LW) or 1980-1990 (LR). The models included additive genetic value, common environment of birth litterand residual random effects, a fixed year x station x batch or year xstation x slaughter date effect and, for traits measured in slaughtered animals, a fixed sex effect and a covariable (weight at the beginning or at the end of the test period). Heritabilities of ADG1, ABT, FCR, ADG2, DP, ECLC and MQI were respectively 0.30, 0.64, 0.22, 0.52, 0.39, 0.60, 0.33 in the LW and 0.34, 0.56. 0.25, 0.46, 0.31, 0.65, 0.23 in the LR breed. Common litter effects ranged from 5% (ABT in LW breed)to 16% (ADG2 in LR breed) of phenotypic variance. Growth traits and FCR exhibited favourable genetic correlations, but were unfavourably correlated to DP and carcass lean content. MQI also showed unfavourable though generally low genetic correlations with all the other traits. These antagonisms were apparent in both breeds, but tended to be largerin the LW than in the LR breed.

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Documento generato il 04/12/20 alle ore 13:03:17