A STUDY OF THE PHENOTYPIC AND GENETIC CHARACTERISTICS OF EWE TRAITS IN LORI-BAKHTIARI SHEEP

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VATANKHAH M.; MORADI SHAHR BABAK M.; NEJATI JAVAREMI A.; MIRAEI ASHTIANI S.R.; VAEZ TORSHIZI R.

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Journal: IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE) Year:2007 | Volume:37 | Issue:6 Page(s): 1049-1057

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Title

A STUDY OF THE PHENOTYPIC AND GENETIC CHARACTERISTICS OF EWE TRAITS IN LORI-BAKHTIARI SHEEP

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Keywords

EWE TRAITSQ3

PHENOTYPIC AND GENETIC PARAMETERSQ3

MULTITRAIT ANIMAL MODELQ3

LORI-SAKHTIARI SHEEPQ4

Abstract

The phenotypic and genetic characteristics of EWE TRAITS were studied using MULTITRAIT ANIMAL MODEL analysis with DFREML procedure on the data of 5025 ewe trait records, collected during 1989 to 2003 in Rearing and Improvement of LORI-SAKHTIARI SHEEP Station (Sholi) in Shahrekord. The model included fixed effects (year, age of ewe and according to trait sex of lamb, and days of weaning as covariate) and random effects additive genetic of ewe, permanent environmental of ewe as well as residual. The overall mean (s.d) of traits were 56.21 (7.33) kg for ewe body weight, 1.91 (0.54) kg for greasy fleece weight, 0.91 (0.28) for conception rate, 1.20 (0.43) for number of lambs born per ewe lambing, 1.12 (0.45) for number of lambs weaned per ewe lambing, 1.06 (0.56) for number of lambs born per ewe joined, 1.00 (0.55) for number of lambs weaned per ewe joined, 5.65 (1.48) kg for total birth weight per ewe lambing, 31.34 (8.26) kg for total weaned weight per ewe lambing, 5.01 (2.28) kg for total birth weight per ewe joined, and 26.77 (13.44) for total weaned weight per ewe joined. The heritability coefficient of ewe body weight and greasy fleece weight were estimated as 0.42±0.02 and 0.55±0.02. For reproduction traits the corresponding estimates ranged from 0.04±0.02 for number of lambs weaned per ewe joined to 0.14±0.02 for number of lambs born per ewe lambing.The repeatability coefficient of ewe body weight (0.60) and greasy fleece weight (0.66) were high while for reproduction traits low (0.11) to moderate (0.26). The phenotypic and genetic correlations between body weight and other traits were low to moderate, between greasy fleece weight and reproduction traits were low, between conception rate and other reproduction traits, they were low whereas among the rest of reproduction traits moderate to high.

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APA: Copy

VATANKHAH, M., MORADI SHAHR BABAK, M., NEJATI JAVAREMI, A., MIRAEI ASHTIANI, S.R., & VAEZ TORSHIZI, R.. (2007). A STUDY OF THE PHENOTYPIC AND GENETIC CHARACTERISTICS OF EWE TRAITS IN LORI-BAKHTIARI SHEEP. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), 37(6), 1049-1057. SID. https://sid.ir/paper/8397/en

Vancouver: Copy

VATANKHAH M., MORADI SHAHR BABAK M., NEJATI JAVAREMI A., MIRAEI ASHTIANI S.R., VAEZ TORSHIZI R.. A STUDY OF THE PHENOTYPIC AND GENETIC CHARACTERISTICS OF EWE TRAITS IN LORI-BAKHTIARI SHEEP. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)[Internet]. 2007;37(6):1049-1057. Available from: https://sid.ir/paper/8397/en

IEEE: Copy

M. VATANKHAH, M. MORADI SHAHR BABAK, A. NEJATI JAVAREMI, S.R. MIRAEI ASHTIANI, and R. VAEZ TORSHIZI, “A STUDY OF THE PHENOTYPIC AND GENETIC CHARACTERISTICS OF EWE TRAITS IN LORI-BAKHTIARI SHEEP,” IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), vol. 37, no. 6, pp. 1049–1057, 2007, [Online]. Available: https://sid.ir/paper/8397/en

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