Evaluation of Hungarian Simmental Cattle Breed for Growth Traits and Its Genetic parameters

A tétel rövid nézete
dc.contributor.advisorKomlósi, István
dc.contributor.authorKebede, Damitie
dc.contributor.departmentDE--ATC--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási Karhu_HU
dc.date.accessioned2012-04-12T11:27:57Z
dc.date.available2012-04-12T11:27:57Z
dc.date.created2012
dc.date.issued2012-04-12T11:27:57Z
dc.description.abstractThe aims of this study were evaluating of Hungarian Simmental cattle growth traits and calculating genetic parameters of growth traits. Calving ease, birth weight, weaning weight, weaning age, 205-day weight and average daily gain of Hungarian Simmental calves (n=2552, bulls=576 , heifers=1976)-and 258 cows were evaluated. The important data on growth traits of Hungarian Simmental breed were provided by Association of Hungarian Simmental Breeders and the body measurements and scores were measured on Derecske farm. Data on growth traits of Hungarian Simmental data were collected from 1999 to 2011 and measurements and scores were collected in 2012. Pedigree information traits were also included for heritablities and correlations calculation. The effects included in the model for the analysis of growth traits were sex (2 classes), birth year (13 classes), birth month (12 classes) and farm (8 classes). The overall results of Hungarian Simmental beef growth traits and body measurements and scores were calculated. R software program was used for variance analysis, least square means (+s.e) and calculating the correlatins between body measurements and scores of Hungarian Simmental cows. PEST software was used for data file and pedigree file coding. VCE6 software was used for calculating heritablities and correlations. The parameters were estimated with animal model. In the course of evaluation by an animal model the fixed effects were sex, farm, year and month. In case of weaning weight weaning age was fixed effect. Dam and animal were random effects. The mean weaning weight (WW) of the calves was 211.29 kg, the mean average daily gain (ADG) was 1101.22 g/day, the mean 205-day weight (205W) was 234 kg, the mean weaning age (WA) was 224 days, the mean birth weight (BW) was 32.86 kg and the mean calving ease was 1.41 score. Results of variance analysis of various factors influencing on growth traits were; sex significantly (P<0.001) influenced CE, BW, WW, WA, 205W and ADG. Birth year of the calf significantly (P<0.001) affected CE, BW, WW, WA, 205W and ADG. Birth month of the calf significantlay (p<0.001) influenced CE, BW, WW, 205W, ADG and (P<0.05) WA. Farm significantly (P<0.001) affected CE, BW, WA, 205W, ADG and WW.The estimated heritablities values of growth traits WW, BW, ADG and 205W were 0.261, 0.163, 0.314 and 0.252 respectively. The genetic correlation among weaning weight, birth weight, average daily gain and 205-day weight were positive but with calving ease was negative. Weaning weight had strong genetic correlation with average daily gain and 205-day weight. Calving ease also had negative genetic correlation with 205-day weight. Birth weight was geneticaly correlated with all other traits weakly. Average daily gain had strong genetic correlation with weaning weight and 205-day weight. The phenotypic correlation of weaning weight and calving ease were negative but with average daily gain and 205-day weight were strong positive correlation. Calving ease also had negative genetic correlation with 205-day weight. Weaning weight had strong genetic correlation with average daily gain and 205-day weight. Birth weight was phenotypically correlated with all other traits weakly. Average daily gain had strong phenotypic correlation with weaning weight and 205-day weight. The correlations between the measurements and scores of Hungarian Simmental cows were positive and negative. The thigh muscle with hip height, hip length, and body depth were positively correlated and the tigh muscle with hip width and body depth were moderately positively correlated.The relationship of shoulder muscle with hip height, hip length, body length and body depth were positive and with hip width were moderately positive. Rump angle and hip height, hip length, hip width, body length and body depth were positively correlated. The relationship of rear leg with hip height, hip length, hip width, body length and body depth were weakly positive.hu_HU
dc.description.courseCandidate of Animal Science M.Schu_HU
dc.description.degreeMschu_HU
dc.format.extent48hu_HU
dc.identifier.urihttp://hdl.handle.net/2437/127310
dc.language.isoenhu_HU
dc.subjectHungarian Simmental breedhu_HU
dc.subject.dspaceDEENK Témalista::Mezőgazdaságtudomány::Állattenyésztéstanhu_HU
dc.titleEvaluation of Hungarian Simmental Cattle Breed for Growth Traits and Its Genetic parametershu_HU
Fájlok
Gyűjtemények
Hallgatói dolgozatok (Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási Kar)