Untitled - MendelNet 2013 - Mendelova zemědělská a lesnická ...

MENDELNET 2013Influence of genotype on production traitsResults of statistical analysis did not prove significant influence of LEPR gene exon 6 and exon 18on production traits. It is possible observe certain tendency in influence on production traits. Ineconomically important traits, for examle rate of muscle and backfat thickness, exon 6 showedinfluence.Tab. 6 presents association polymorphism of LEPR gene exon 6 and 18 with production pork. Is itpossible to suppose, that not significant results were caused by small tested population. Significantdifferences were observed in bigger tested population by other authors. Chen C. et al. 2004detected significant difference in polymorphism in exon 18 at Duroc and Yorkshire. Inpolymorphisms in exon 6 they found significant difference among genotypes bb and Bb atLandrace. Difference among breeds and among genotypes too were only by tenths of millimetres.Group of tested pigs was choosen randomly, however sample was relatively small. Normaldistribution of date could be break.Tab.6: Influence of genotype on production traits.Rate of muscle (%)Backfat thickness(mm)Muscle thickness(mm)LSM ± SE LSM ± SE LSM ± SEBb 54.53 ± 0.98 17.89 ± 1.23 62.07 ± 2.16bb 53.99 ± 0.87 18.54 ± 1.09 60.93 ± 1.87DD 54.16 ± 0.87 18.14 ± 1.09 60.22 ± 1.82Dd 54.36 ± 0.98 18.29 ± 1.24 62.79 ± 2.21For all traits p > 0.05 – not significant.CONCLUSIONVariability of LEPR gene and his association with indicators of production pork was not proved.Production traits as rate of muscle and backfat thickness were probably influenced by exon 6.It confer about traits of carcass, which play important role in coin pork. They are basic for economyof farming. Place of farming considerable influenced muscle thickness.Association analysis did not prove conclusive influence of LEPR gene in exon 6 and 18on indicators of production pork. These results can be cause by insufficiently large population or byirregular distribution of genotypes. It would be suitable to do other analysis of polymorphismsin LEPR gene with bigger population of tested animals.REFERENCESCHEN C. C., CHANG T., SU H. Y., 2004: Characterization of porcine leptin receptorpolymorphisms and their association with reproduction and production traits. Animalbiotechnology, 15, 1: 89–102. ISSN 1049-5398.JEŽKOVÁ A., 2012: Chov prasat a genomika v Dánsku. Náš chov, 72, 1: 70. ISSN 0027-8068.MUÑOZ G., ÓVILO C., SILIÓ L., TOMÁS A., NOGUERA L. J., RODRÍGUEZ M. C., 2009:Single- and joint.population analyses of two experimental pig crosses to confirm quantitative trait762 | P age