ESTIMATION OF GENETIC PARAMETERS FOR BODY WEIGHT TRAITS IN LORI-BAKHTIARI LAMBS USING RANDOM REGRESSION MODEL

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MORADIAN H.; VATANKHAH M.; MIRZAEI HAMID REZA

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: MODERN GENETICS JOURNAL (MGJ) Year:2008 | Volume:2 | Issue:4 Page(s): 23-30

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Title

ESTIMATION OF GENETIC PARAMETERS FOR BODY WEIGHT TRAITS IN LORI-BAKHTIARI LAMBS USING RANDOM REGRESSION MODEL

Author(s)

MORADIAN H. | VATANKHAH M. | MIRZAEI HAMID REZA | Issue Writer Certificate

Keywords

GENETIC PARAMETERSQ2

BODY WEIGHTQ3

RANDOM REGRESSION MODELQ3

LORI-BAKHTIARI LAMBSQ3

Abstract

GENETIC PARAMETERS of BODY WEIGHT using RANDOM REGRESSION MODEL were estimated using 24056 live BODY WEIGHT test day records collected on 5633 lambs during 1989 to 2005 at the rearing and Lori-Bakhtiari sheep breeding station in Shahrekord. The model was included fixed effects (year of birth, sex of lamb, birth type of lamb and age of dam) and random effects additive genetic, permanent environmental (due to repeated records of each lamb) and residual. RANDOM REGRESSION MODELs were fitted with order 3 to 5 for additive genetic and permanent environmental effects. Results indicated that the 5th order was more appropriate than others. The value of heritability with this model for lamb BODY WEIGHT at birth, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 months of age were estimated as 0.18,0.16, 0.23, 0.26, 0.25, 0.22, 0.21, 0.21, 0.23, 0.25, 0.27, 0.28 and 0.26 respectively. The proportion of permanent environmental variance to phenotypic variance was increased from 0.01 for birth weight to 0.74 for BODY WEIGHT at 7 months of age and then decreased with increasing age of lamb. Genetic correlations between BODY WEIGHTs at closer ages were higher. In general the results obtained in this study suggested that lamb BODY WEIGHT were influenced by different factors (additive genetic and permanent environment), and due to various estimated heritability for lamb BODY WEIGHT from birth to 12 months of age, it could be concluded that some different genes might be affect lamb BODY WEIGHT at birth to 12 months of age.

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APA: Copy

MORADIAN, H., VATANKHAH, M., & MIRZAEI, HAMID REZA. (2008). ESTIMATION OF GENETIC PARAMETERS FOR BODY WEIGHT TRAITS IN LORI-BAKHTIARI LAMBS USING RANDOM REGRESSION MODEL . MODERN GENETICS JOURNAL (MGJ), 2(4), 23-30. SID. https://sid.ir/paper/116528/en

Vancouver: Copy

MORADIAN H., VATANKHAH M., MIRZAEI HAMID REZA. ESTIMATION OF GENETIC PARAMETERS FOR BODY WEIGHT TRAITS IN LORI-BAKHTIARI LAMBS USING RANDOM REGRESSION MODEL . MODERN GENETICS JOURNAL (MGJ)[Internet]. 2008;2(4):23-30. Available from: https://sid.ir/paper/116528/en

IEEE: Copy

H. MORADIAN, M. VATANKHAH, and HAMID REZA MIRZAEI, “ESTIMATION OF GENETIC PARAMETERS FOR BODY WEIGHT TRAITS IN LORI-BAKHTIARI LAMBS USING RANDOM REGRESSION MODEL ,” MODERN GENETICS JOURNAL (MGJ), vol. 2, no. 4, pp. 23–30, 2008, [Online]. Available: https://sid.ir/paper/116528/en

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