CATTLE BREEDING PROGRAMME IMPROVEMENT IN CROATIA 19?4.-1987. 1. Phenotype values of bull mothers in Simmental breeding programme in Croatia.

Abstract

Kada želimo raspravljati o smjernicama i ciljevima određenog i zamišljenog uzgojnog programa u nekoj populaciji goveda moramo poznavati fenotipske vriiednosti početne, izvorne populaciie - stada matičnih krava. Utvrtđivanjem tih vrijednosti postavljamo temelj uzgojnog programa. Prema zahtjevima tržišta postavljamo smjer, način i cilj, a pravilnim odabirom muških rasplodnjaka pokušavamo ostvariti što je više moguće postavljeni cilj s obzirom na feno- i genotipske vrijednosti muških i ženskih potomaka. Svrha rasprave i istraživania bila ie utvrđivanje fenotipskih odlika stada bikovskih majki odabrariih po određenim mjerilima i pravilima uzgojno selekcijskog kodeksa za populaciju hrvatskog simentalca. Utvrđene vrijednosti fenotipa za 167 BM o dobi u času odabira, isključivanja i trajanja iskorištavanja pokazuju da odabrane matične krave zadovoljavaju kriterije o fenotipu tj. mjere za visinu u grebenu, dubinu prsiju i ocjenu klasa. Ukupni broj oteljene teladi po jednoj BM (8,734) potvrđuje uz visoku dob i zadovoljavajuću plodnost iako je međutelidbeno razdoblje nešto više od željenog (444,4 dana prema 400,0 dana). Broj odabrane muške teladi po jednoj BM (2,346 u prosjeku) za performans testnu stanicu također zadovoljava. Nakon utvrđivanja rezultata i proizvodnje mlijeka i mliječne masti po BM prije i za vrijeme iskorištavanja moći ćemo dati konačnu ocjenu o vrijednosti odlikama 167 BM, majkama 196 sinova koji su ušli u stado bikova središnjeg zavoda u razdoblju od 14 godina.When we want to talk about the aims and purpose of a specific and desired breeding proqramme in some population of cattle, we are supposed to know the phenotype values of the very first population i.e. herds of parent breeding cows. By establishing these values we establish the basis of the breeding programme. According to the demand of the market we also declare the intention, the way and the purpose, and with the adequate choice of sires we try to realise the best we can our aim with regard to pheno- and genotype value of the new male and female generation. The purpose of this debate and of the research was to establish the phenotype characteristics of the herd of bull mothers according to the specific standards and rules of breeding and selection codex for the population of the Croatian Simmental bull. The established values of the phenotype of 167 BM about the aqe at the moment of selection, and duration of their use show that the selected breeding cows satisfy all the requirements regarding the phenotype i.e. measurements of the height of withers, depth of chest and the evaluation of class. The total number of calves per one BM (8,734) confirms both high age and satisfactory fertility, although the intercalving period is a little higher than desired (444,4 days in comparison to 400,0 days). The number of selected male calves per one BM (2,346 on average) for the performance, test station is satisfactory too. After establishing the results regarding milk yield as well as milk fat per BM before and during exploitation we shall be able give our final evaluation on the value characteristics of 167 BMs, mothers of 196 sons joining the herd of bulls at "Središnji zavod" in the period of 14 years

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