Genetic parameters of production and reproduetive traits in on a farm tested Danish Large White and Landrace swine in Greece

Abstract

SummaryProduction and reproduetive traits in Danish Landrace (LD) and Large White (LW) swine were analysed by restricted maximum likelihood methods to obtain heritabilities as well as genetic and phenotypic correlations. Production traits were: age, backfat thickness (BT), muscle depth (MD) and the ratio BT/MD, adjusted to Standard bodyweight of 85 kg. Reproduction traits were: number of pigs born (NB) and number of pigs weaned (NW) per sow and parity. Heritabilities for age, BT, MD and BT/MD were 0.60, 0.44, 0.51 and 0.42 for LD and 0.36, 0.44, 0.37 and 0.45 for LW, respectively. Genetic correlations between age and BT were -0.22 in LD and -0.44 in LW. The genetic correlation between age and MD was close to zero in both breeds. Genetic correlation between BT and MD were -0.36 and -0.25 in LD and LW, respectively. Heritabilities for NB were 0.25 in LD and 0.13 in LW while heritabilities for NW were close to zero in both breeds. Genetic correlation between NB and NW was 0.46 and 0.70 in LD and LW, respectively. Die geschätzte genetische Korrelation zwischen dem Alter und der BT betrug -0,22 bei den LD-und -0,44 bei den LW-Schweinen, während die entsprechende Korrelation zwischen dem Alter und der MD in beiden Rassen nahe Null lag. Die geschätzte genetische Korrelation zwischen der BT and der MD betrug -0,36 bei den LD-und -0,25 bei den LW-Schweinen. Die Heritabilitätswerte für die NB betrug 0,25 bei den LD-und 0,13 bei den LWSchweinen, während die entsprechenden Werte für die NW bei beiden Rassen gleich Null waren. Zwischen der NB und der NW wurde eine genetische Korrelation von 0,46 bei den LD-und von 0,70 bei den LW-Schweinen ermittelt.

Genetic parameters of direct and ratio traits from field and station tests of pigs

“…The received association is unfavourable as the selection on LMP decreases MQ. The existence of this unfavourable genetic correlation was justified by other authors (BIEDERMANN et al 2000;BIZELIS et al, 2000;THOLEN et al, 2001). Table 8 Estimated genetic correlation coefficients of the ratio (field and station) traits in the Hungarian Landarce breed (standard errors of estimates are given in brackets) (Genetische Korrelationen zwischen indirekten Merkmalen (in Stations-und Feldprüfung) bei der Ungarischen Landrasse) FCR 2 VC% 3 ADG 4 -0.39 (0.06) 0.12 (0.07) 0.66 (0.05) NDG 1 -0.40 (0.06) -0.19 (0.04) FCR 2 0.00 (0.05) VC% 3 ADG 4 1 Netto-Lebenstagzunahme; 2 Futterverwertung; 3 Anteil wertvoller Teilstücke; 4 Lebenstagzunahme Table 9 Estimated genetic correlation coefficients between the direct and ratio trait equivalents in the Hungarian Large White and Hungarian Landrace breeds (standard errors of estimates are given in brackets) (Genetische Korrelationen zwischen den direkten und indirekten Merkmalen bei den Rassen von Ungarischem Edelschwein und Ungarischer Landrasse (Standardabweichung in Klammern)) DOT 4 -NDG 5 FEED 6 -FCR 7 VC 8 -VC% 9 AGE 10 -ADG 11 Genotype 1 -0.92 (0.01) 0.86 (0.01) 0.89 (0.01) -0.79 (0.01) Large White 2 -0.95 (0.01) 0.83 (0.03) 0.90 (0.01) -0.74 (0.01) Landrace 3 1 Rasse; 2 Ungarisches Edelschwein; 3 Ungarische Landrasse; 4 Masttage; 5 Netto-Lebenstagzunahme; 6 Futterverbrauch; 7 Futterverwertung; 8 Masse wertvoller Teilstücke; 9 Anteil wertvoller Teilstücke; 10 Alter; 11 Lebenstagzunahme Based on the estimated heritabilities and random litter effects, station test traits had higher heritabilities than field test traits, where measuring discipline and care might be increased.…”

Performance traits in different generations of imported Danish Landrace pigs

“…It is supposed that reproductive, fattening and meatiness traits (phenotype) of pigs depend on environmental conditions even up to 60 %, and only up to 40 % depend on genotype (Close 1970, Curtis 1983, Verhagen 1987, Cameron 1993, Diekman et al 1994, Verstegen & Close 1994, Lynch & Walsh 1998, Bizelis et al 2000, Röhe et al 2000, Hoste 2003, Köck et al 2009). Therefore, after changing environmental conditions, the productivity of animals often gets worse (Cameron 1993, Lynch & Walsh 1998, Hoste 2003.…”