Analysis of the Environmental Factors Affecting the Growth Traits of Iran-Black Sheep

DOI: 10.22161/ijeab/2.1.21

Keyword: Iran-Black sheep, Growth traits, Environmental factors.

Abstract: A study was conducted to evaluate the effects of non-genetic factors on the growth behavior of Iran-Black sheep. The data of growth performances, birth weight (BW), weaning weight (W3), weight at 6, 9and 12 months of age (W6, W9 and W12, respectively), were taken from 1522 lambs belonging to data bank from Abbas Abad Sheep Breeding Station located at the North-east of Iran during a period of five years. Statistical analyses were performed using a general linear model including non-genetic factors: lamb sex, birth year and litter size as main effects, the lamb’s age when weighed as covariate, and the interactions between these factors. Results showed that all traits were significantly (P<0.001) affected by all factors. However, no interaction between the factors was found for all traits. Environmental factors have very important roles in the development and growth of Iran-Black sheep at different ages. Therefore, a correction is necessary to increase the accuracy of direct selection on lamb weight at different growth stages.

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Page No: 159-164

Cite this Article:

Reza Tohidi, Yunes Ismailjami, Arash Javanmard et al."Analysis of the Environmental Factors Affecting the Growth Traits of Iran-Black Sheep". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878),vol 2, no. 1, 2017, pp.159-164 AI Publications doi:10.22161/ijeab/2.1.21

Reza Tohidi, Yunes Ismailjami, Arash Javanmard, P.(2017).Analysis of the Environmental Factors Affecting the Growth Traits of Iran-Black Sheep. International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(1), 159-164.10.22161/ijeab/2.1.21

Reza Tohidi, Yunes Ismailjami, Arash Javanmard, P.(2017).Analysis of the Environmental Factors Affecting the Growth Traits of Iran-Black Sheep. International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(1), pp.159-164.

Reza Tohidi, Yunes Ismailjami, Arash Javanmard. 2017."Analysis of the Environmental Factors Affecting the Growth Traits of Iran-Black Sheep". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(1):159-164.Doi:10.22161/ijeab/2.1.21

Reza Tohidi, Yunes Ismailjami, Arash Javanmard."Analysis of the Environmental Factors Affecting the Growth Traits of Iran-Black Sheep", International Journal of Environment Agriculture and Biotechnology,vol.2,no. 1, pp.159-164,2017.

@article { rezatohidi2017analysis,
title={Analysis of the Environmental Factors Affecting the Growth Traits of Iran-Black Sheep},
author={Reza Tohidi, Yunes Ismailjami, Arash Javanmard , R},
journal={International Journal of Environment Agriculture and Biotechnology},
volume={2},
year= {2017} ,
}