TY  - GEN
T1  - Estimatian of individual and maternal heterosis and genetic parameters for production traits in holstein-indigenous crossbred cows of Iran
A1  - Moradi-Shahrbabak, M.
LA  - English
PB  - Malaysian Society of Animal Production
YR  - 2014
UL  - http://discoverylib.upm.edu.my/discovery/Record/oai:http:--agris.upm.edu.my:0-7943
AB  - This study used 8551 and 7665 milk production records derived from 1314 and 1178 crossbed (CB) and indigenous (IND) cows for evaluation.  Records were gathered during 1991 to 2000 in Isfehan province by the Iranian Animal Breeding Center (IABC).  Data were analyzed using single and repeated record animal models with derivative- free restricted maimum likelihood (DF-REML) method.  The adjusted means for milk and fat yield in FICB, IND and first backcross to Holstein (BC1H) cows were 1531.9 (37.1) and 60.3 (1.4), 2228.1 (54) and 77 (1.9), and 2662.3 (120.7) and 103.3 (4.4), respectively.  Results showd that lactation, herd, and year-season factors affected milk and fat yield significantly.  Cows with 75% of Holstein genes had higher least squared means for milk and fat yield than the others.  The effects of Holstein breed, individual and maternal heterosis were estimated 20.86, 11.85, and 5.05 kg for milk yield, and 0.172, 0414, and 0.293 kg for fat yield, respectively.  Estimated heritability and repeatability were 0.37 (0.03) and 0.33 (0.005), 0.35 and 0.43 (0.03) and 0.37 (0.02), and 0.38 for milk and fat yield, respectively, in single and repeated record models.
KW  - CROSSBREDS
KW  - COWS
KW  - LAND RACES
KW  - HETEROSIS
KW  - MILK YIELD
KW  - HERITABILITY
KW  - GENETIC INHERITANCE
KW  - GENETIC PARAMETERS
KW  - EVALUATION
KW  - PRODUIT DE CROISEMENT
KW  - VACHE
KW  - RACE INDIGENE
KW  - VIGUEUR HYBRIDE
KW  - RENDEMENT LAITIER
KW  - HERITABILITE
KW  - HEREDITE
KW  - PARAMETRE GENETIQUE
KW  - IRAN REPUBLIQUE ISLAMIQUE
KW  - PRODUCTOS DEL CRUZAMIENTO
KW  - VACA
KW  - RAZAS INDIGENAS
KW  - VIGOR HIBRIDO
KW  - RENDIMIENTO LECHERO
KW  - HEREDABILIDAD
KW  - HERENCIA GENETICA
KW  - PARAMETROS GENETICOS
KW  - EVALUACION
KW  - IRAN REPUBLICA ISLAMICA
ER  -