EVALUATION OF THE GENETIC AND PHENOTYPIC POTENTIAL OF PRODUCTIVE TRAITS IN NAJDI DAIRY CATTLE USING UNI AND MULTIPLE TRAITS MODEL

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NAZARI M.; BEIGI NASSIRI M.T.; FAIAZI J.

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Journal: SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL Year:2008 | Volume:3 | Issue:4 (17) Page(s): 73-80

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Title

EVALUATION OF THE GENETIC AND PHENOTYPIC POTENTIAL OF PRODUCTIVE TRAITS IN NAJDI DAIRY CATTLE USING UNI AND MULTIPLE TRAITS MODEL

Author(s)

NAZARI M. | BEIGI NASSIRI M.T. | FAIAZI J. | Issue Writer Certificate

Keywords

HERITABILITYQ2

MILK AND FAT YIELDQ3

NAJDI CATTLEQ3

CALVING SEASENQ3

KHOUZESTANQ2

ANIMAL MODELQ3

UNI AND MULTIPLE TRAITSQ3

Abstract

In this study 15600 records of MILK AND FAT YIELD and fat percentage which were collected during 1988-2004 were used to estimate genetic parameters. The data were obtained by Animal Breeding Station of NAJDI CATTLE located in Shooshtar. (Co) Variance components were estimated using UNI AND MULTIPLE TRAITS ANIMAL MODEL with Restricted Maximum Likelihood method. Mean and Standard deviation for milk yield, fat yield and fat percentage were: 706.68±19.68, 30.10±2.96 and 4.26±0.05 respectively. In this model, the effect of the month and calving season, lactation period, milking type on all traits was significant. Calving interval was covariable. HERITABILITY of milk yield, fat yield and fat percentage were: 0.29±0.05, 0.1±0.01 and 0.15±0.02 respectively using univariate model. Genetic and phenotypic correlation between milk yield-fat percentage, milk yield-fat yield, fat yield-fat percentage were: -0.39 and -0.04, 0.83 and 0.3, 0.7 and 0.32 respectively. HERITABILITY for milk yield trait was moderate. So, selection on the basis of this trait may cause desirable genetic gain.

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APA: Copy

NAZARI, M., BEIGI NASSIRI, M.T., & FAIAZI, J.. (2008). EVALUATION OF THE GENETIC AND PHENOTYPIC POTENTIAL OF PRODUCTIVE TRAITS IN NAJDI DAIRY CATTLE USING UNI AND MULTIPLE TRAITS MODEL. SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL, 3(4 (17)), 73-80. SID. https://sid.ir/paper/97247/en

Vancouver: Copy

NAZARI M., BEIGI NASSIRI M.T., FAIAZI J.. EVALUATION OF THE GENETIC AND PHENOTYPIC POTENTIAL OF PRODUCTIVE TRAITS IN NAJDI DAIRY CATTLE USING UNI AND MULTIPLE TRAITS MODEL. SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL[Internet]. 2008;3(4 (17)):73-80. Available from: https://sid.ir/paper/97247/en

IEEE: Copy

M. NAZARI, M.T. BEIGI NASSIRI, and J. FAIAZI, “EVALUATION OF THE GENETIC AND PHENOTYPIC POTENTIAL OF PRODUCTIVE TRAITS IN NAJDI DAIRY CATTLE USING UNI AND MULTIPLE TRAITS MODEL,” SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL, vol. 3, no. 4 (17), pp. 73–80, 2008, [Online]. Available: https://sid.ir/paper/97247/en

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