Soliman, A., Mostafa, M., Genena, S. (2009). NON-GENETIC FEATURES OF MILK YIELD TRAITS UNDER CUMULATIVE MONTHLY RECORDING SYSTEMS FLECKVIEH CATTLE.. Journal of Animal and Poultry Production, 34(8), 8727-8735. doi: 10.21608/jappmu.2009.119175
A. M. Soliman; M. A. Mostafa; Sheren K. Genena. "NON-GENETIC FEATURES OF MILK YIELD TRAITS UNDER CUMULATIVE MONTHLY RECORDING SYSTEMS FLECKVIEH CATTLE.". Journal of Animal and Poultry Production, 34, 8, 2009, 8727-8735. doi: 10.21608/jappmu.2009.119175
Soliman, A., Mostafa, M., Genena, S. (2009). 'NON-GENETIC FEATURES OF MILK YIELD TRAITS UNDER CUMULATIVE MONTHLY RECORDING SYSTEMS FLECKVIEH CATTLE.', Journal of Animal and Poultry Production, 34(8), pp. 8727-8735. doi: 10.21608/jappmu.2009.119175
Soliman, A., Mostafa, M., Genena, S. NON-GENETIC FEATURES OF MILK YIELD TRAITS UNDER CUMULATIVE MONTHLY RECORDING SYSTEMS FLECKVIEH CATTLE.. Journal of Animal and Poultry Production, 2009; 34(8): 8727-8735. doi: 10.21608/jappmu.2009.119175
NON-GENETIC FEATURES OF MILK YIELD TRAITS UNDER CUMULATIVE MONTHLY RECORDING SYSTEMS FLECKVIEH CATTLE.
1Dept. of Animal Production, Fac. of Agric., Zagazig Univ., Egypt.
2Dept. of Animal Production, Fac. of Agric., Mansoura Univ., Egypt.
3Animal Production Res. Inst., Ministry of Agric., Dokki, Cairo, Egypt.
Abstract
Data were collected in two consecutive years (1990, 1991) and included 19000, 27158 and 18999 records of three different periods of simulated cumulated 31 – 120 (CMRS1), 61 – 150 (CMRS2) and 31 – 150 (CMRS3) day of lactation for the first lactation in Fleckvieh cows from the Official Federation of Austrian Cattle Breeders (ZAR). Yields of 305-day (305-d MY) and cumulative milk (CMY), fat (305-d FY & CFY), protein (305-d PY & CPY), fat-plus-protein (305-d FPY & CFPY) and percentage of protein yield/fat yield (305 POF & CPOF%) under CMRS1 up to CMRS3 were studied. The effects of calving year-season (CYS), age at first calving (AFC), days open (DO), the time from the first monthly test-day to next calving date (TFTNC) and sire on 305-day and cumulative milk traits (305-day MYT & CMYT) were examined under various cumulative monthly recording systems (CMRS).
In general, the estimates of coefficient of variation (C.V) for 305-day MYT were (16.5 – 18.6%) lower than the calculated CMYT (20.4 – 22.9%), which reflected the large for CMYT. The estimates of C.V. for both FY and CFY were higher than all other 305-day MYT and CMYT. On the other side, the estimates of C.V. for both POF% and CPOF% under CMRS seemed to be similar.
The effects of sire were highly significant (P < 0.001) for all traits studied. Consequently, sire selection would lead to genetic improvement of milk traits. Calving year-season (CYS) affected significantly (P < 0.001) most of the studied traits under CMRS. Days open, age at first calving and the time from the first monthly test day to next calving date affected, significantly (P < 0.05 or P < 0.01 or P < 0.001) all traits studied and should be considered in sire and cow evaluation program.
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