Phenotypic and genetic correlation of fertility traits of Swedish landrace sows

Abstract

The aims of this paper were: determination of correlation between fertility traits both at phenotypic and at genetic level, determination of dependency of exsamined parameters from the analysed data size as well as determination of influence of data corrections on correlations between traits. Phenotypic correlation between litter size and weight did not confirm after correction for NWP and LWW. Between NLB and NTB phenotypic correlation was complete (from rP=0.922 to rP=0.929) and statistical very significant (P lt 0.01). Genetic correlation among traits were in range from low (rG=0.230, NWP:TNB) to complete (rG=1.197, cNWP:NLB). So wide range for genetic correlation was consequence of analyzed data set. Statistical significance for obtained parameters were high (P lt 0.01).

Cilj ovog rada bio je da se utvrdi povezanost između osobina plodnosti na fenotipskom i genetskom nivou. da se utvrdi zavisnost ispitivanih parametara od obima analiziranih podataka kao i uticaj sprovedenih korekcija podataka na povezanost između osobina. Fenotipska povezanost osobina veličine i mase legla nije ustanovljena posle sprovedenih korekcije za BOP i MLPO. Između BŽRP i BURP fenotipska povezanost je bila potpuna (od rp=0.922 do rp=0.929) i statistički visoko značajna (P lt 0.01). Genetske korelacije su se kretale od jako slabe (rG=0.230, KBOP:BURP) do potpune (rG=1.197, KBOP:BŽRP) što je zavisilo od osobina i korišćenih podataka u analizi. Statistička značajnost utvrđenih parametara je bila visoka (P lt 0.01).