COMPARISON OF REPEATABILITY, MULTIPLE-TRAIT AND RANDOM REGRESSION MODELS TO ESTIMATE THE GENETIC PARAMETERS OF DAYS FROM CALVING TO FIRST SERVICE IN IRANIAN HOLSTEIN CATTLE

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GHIASI HEYDAR; ABDOLLAHI ARPANAHI ROSTAM; TAHERKHANI REZA

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Journal: Journal of Animal Production Year:2017 | Volume:19 | Issue:2 Page(s): 255-264

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Title

COMPARISON OF REPEATABILITY, MULTIPLE-TRAIT AND RANDOM REGRESSION MODELS TO ESTIMATE THE GENETIC PARAMETERS OF DAYS FROM CALVING TO FIRST SERVICE IN IRANIAN HOLSTEIN CATTLE

Author(s)

GHIASI HEYDAR | ABDOLLAHI ARPANAHI ROSTAM | TAHERKHANI REZA | Issue Writer Certificate

Keywords

FERTILITYQ2

GENETIC EVALUATIONQ1

GENETIC PARAMETERSQ2

HOLSTEIN CATTLEQ2

Abstract

In order to estimate the GENETIC PARAMETERS for days from calving to first service (DFS) in Iranian HOLSTEIN CATTLE by using repeatability, multiple-trait (MT) and random regression (RR) models, 159, 482 records of parities 1 to 6 collected during 1981 to 2013 and distributed over 33 large Holstein herds were used. Bayesian information criterion of MT model was lower than other models and Bayesian factor of MT model was significant compared to other models (p<0. 05). Estimates of heritability of DFS with RR model decreased from parity 1 (0. 09± 0. 01) to parity 6 (0. 03± 0. 01). Estimated heritability by MT model decreased from parity 1 (0. 08) to parity 5 (0. 04) and increased in parity 6 (0. 10). The obtained heritability using repeatability model was 0. 055± 0. 01. Genetic correlations between DFS in different parties were reduced continuously with increasing distance between parities in RR and MT models. Overall, the result of this study indicates that multiple trait model performs better than other models in estimation of genetic parameter for DFS.

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APA: Copy

GHIASI, HEYDAR, ABDOLLAHI ARPANAHI, ROSTAM, & TAHERKHANI, REZA. (2017). COMPARISON OF REPEATABILITY, MULTIPLE-TRAIT AND RANDOM REGRESSION MODELS TO ESTIMATE THE GENETIC PARAMETERS OF DAYS FROM CALVING TO FIRST SERVICE IN IRANIAN HOLSTEIN CATTLE. JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE), 19(2 ), 255-264. SID. https://sid.ir/paper/209127/en

Vancouver: Copy

GHIASI HEYDAR, ABDOLLAHI ARPANAHI ROSTAM, TAHERKHANI REZA. COMPARISON OF REPEATABILITY, MULTIPLE-TRAIT AND RANDOM REGRESSION MODELS TO ESTIMATE THE GENETIC PARAMETERS OF DAYS FROM CALVING TO FIRST SERVICE IN IRANIAN HOLSTEIN CATTLE. JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE)[Internet]. 2017;19(2 ):255-264. Available from: https://sid.ir/paper/209127/en

IEEE: Copy

HEYDAR GHIASI, ROSTAM ABDOLLAHI ARPANAHI, and REZA TAHERKHANI, “COMPARISON OF REPEATABILITY, MULTIPLE-TRAIT AND RANDOM REGRESSION MODELS TO ESTIMATE THE GENETIC PARAMETERS OF DAYS FROM CALVING TO FIRST SERVICE IN IRANIAN HOLSTEIN CATTLE,” JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE), vol. 19, no. 2 , pp. 255–264, 2017, [Online]. Available: https://sid.ir/paper/209127/en

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