Reproductive characteristics of Posavje horse in Slovenia

Namen diplomskega dela je bil raziskati reprodukcijske lastnosti posavskega konja v Sloveniji. Posavski konj je slovenska avtohtona pasma, ki je razširjena po celotni državi. Leta 1993 so za to pasmo v Sloveniji začeli voditi rodovniško knjigo. Reprodukcijski podatki so se začeli beležiti šele leta 2009, ko so v CRK začeli vpisovati podatke iz pripustnih listov. Večini rejcev posavskega konja pretežni prihodek predstavlja prodaja žrebet (konj) za meso. Posledično je eden glavnih rejskih ciljev dobra plodnost. To za rejca pomeni, da imajo kobile vsako leto žrebe. Pasma je znana tudi po dobrem izkoriščanju krme in zgodnji zrelosti, kar omogoča učinkovito prirejo mesa. Najboljši podmladek rejci odberejo za nadaljnjo rejo. Za analizo reprodukcijskih lastnosti smo pridobili podatke iz CRK. Za pripravo in analizo podatkov smo uporabili programa SAS in MS Excel. Dobljene podatke smo najprej omejili z letom žrebitve 2000 ter logičnimi kontrolami. Rezultate smo predstavili v tabelarični in grafični obliki. Glavne ugotovitve so, da je delež živali ženskega spola, vpisanih v rodovniško knjigo, večji od pričakovanega. To kaže, da se ne registrira vseh žrebet. Posledično so rezultati reprodukcijskih lastnosti podcenjeni. Ni pa mogoče uporabiti podatkov za oceno razlik med živalmi. Da bi podatke o reprodukcijskih lastnosti lahko uporabili za potrebe selekcije, je potrebno vzpostaviti okolje, kjer se bodo beležili podatki o vseh žrebetih oziroma žrebitvah.The aim of this thesis was to research reproductive characteristics od Posavje horse in Slovenia. Posavje horse is a Slovenian indigenous horse breed that is spread throughout the country. Herdbook for this breed was established in 1993, but reproduction data were not recorded until 2009, when it was entered into the national Central Register od Equidae (CRK). The main source of income for most Posavje horse breeders are foals and horses that are sold for meat production. Consequently, one of the most important breeding goals is good fertility. This means that the mares are expected to have a foal every year. The breed is also known for efficient feed conversion and early maturity, which also enables efficient fattening of slaughter animals. The best offspring are selected for further breeding. To analyse the reproductive characteristics, data were obtained from the CRK. Statistical package SAS and MS Excel were used to prepare the data and to perform the statistical analysis. Logical controls are restriction to the birth year of miminum 2000 were applied. The results are presented in tabular and graphical form. The main observation is that an unexpectedly high percentage of females compared to males were registered. This leads to conclusion that not all foals are registered, and our results are underestimated. The data are not suitable for animal comparison. In order to be able to use the reproductive characteristics data for selection purposes, a proper recording environment should to be established to include all foals/foalings