Asian Journal of Animal and Veterinary Advances1683-99191996-3289Academic Journals Inc.10.3923/ajava.2010.112.119OrhanH. KaygisizA. 2201052In this study, some environmental factors and genetic
parameters affecting performance of racing for Turk-Arabian horses at
different distances raised at Anatolian Agricultural Farms were investigated.
In the experiment, 3184 race records of 437 offspring of 32 horses races
from 1996 to 2008 were evaluated by two statistical models. The effects
of year, hippodrome, track and distance on racing time and race speed
were found highly significant (p<0.01). Genetic parameters were estimated
by REML procedure using DFREML program. Estimated heritabilities of race
finishing times ranged from 0.106 to 0.044 and estimated repeatability
from 0.714 to 0.233. Results indicated that a moderate level of genetic
progress is possible for racing time if selection is based on the phenotypic
value of the horses. For short and medium distance horse breeding values,
calculated spearman correlation (0.26) was not significant (p>0.05).
This should be taken into account in the breeding program, since the short
and medium distance running abilities of horses were independent. In addition,
runway type should be considered for estimation of the breeding values.
Model-1 and Model-2 provided similar results for racing time. Model-1
(full model) may be preferred to Model-2 as interpretation of racing time
abilities for all the factors available via Model-1.]]>Bakhtiari, J. and N.E.J. Kashan,2009120151157Ekiz, B., O. Kocak and A. Yılmaz,200548121129Ekiz, B. and O. Kocak,2005122349356Ekiz, B. and O. Kocak,20073115Ekiz, B., O. Kocak and H. Demir,200529543549Kocak, O. and B. Ekiz,200582286289Koseman, A.,20052005Lee, J.E., K.D. Park, Y.M. Yang, Y.S. Choi, J.C. An and M.Y. Sin,199234191196Meyer, K.,19971997Moritsu, Y., H. Funakoski and S. Ichikawa,199455358Mota, M.D.S.,2006104227232Mota, M.D.S., A.R. Abrahao and H.N. Oliveira,2005122393399Mota, M.D.S., H.N. Oliveira and R.G. Silva,1998115123129Oki, H., Y. Sasaki and R.L. Willham,1995112146150Park, K.D. and K.J. Lee,199941135140Orhan, H., E. Efe and M. Sahin,20042004Sobczynska, M.,200651523528Taveira, R.Z., M.D.S. Mota and H.N. Oliveira,2004121384391Villela, L.C.V., M.D.S. Mota and H.N. Oliveria,2002119229234