Estimation of (co)Variance components of growth curve parameters in Japanese quail

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FARAJI AROUGH HADI; EBRAHIMI KHADIJEH; DASHAB GHOLAM REZA; ROKOUEI MOHAMMAD

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Journal: Iranian Journal of Animal Science Year:2018 | Volume:49 | Issue:2 Page(s): 237-246

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Title

Estimation of (co)Variance components of growth curve parameters in Japanese quail

Author(s)

FARAJI AROUGH HADI | EBRAHIMI KHADIJEH | DASHAB GHOLAM REZA | ROKOUEI MOHAMMAD | Issue Writer Certificate

Keywords

GompertzQ1

growth rateQ1

mature rateQ1

inflection pointQ1

Abstract

The purpose of the present study was to estimation of (co)variance components and genetic parameters of the growth curve in crossbred population. For this purpose, body weight records were fitted through the Gompertz curve and curve parameters were estimated. The final weight (Wf), hatch weight (W0), mature rate index (K), age (ti) and weight (Wi) in inflection point and growth rate in different days for all of the birds were predicted by Gompertz model. The estimated of (co)variance and genetic parameters were performed using a multi-trait animal model through Gibbs sampling. Heritability of the growth cure parameters including final weight, hatch weight, mature index and weight and age in inflection point was 0. 335, 0. 269, 0. 273, 0. 291 and 0. 397, respectively. Also, the heritability of growth rate traits from hatch to 45 days was estimated high and varied between 0. 311 to 0. 424. The genetic correlation between hatch weight with mature index and final weight was positive (0. 14 and 0. 24), but the genetic correlation between hatch weight with age and weight at inflection point was negative (-0. 24 and-0. 12). The genetic correlation of the mature index with hatch weight, mature weight, age and weight at inflection point was negative. Genetic correlation of the mature index with growth rate in the early ages of bird was positive and it was estimated medium and negative for late. The weight at inflection point had the positive genetic correlation with most of growth rate traits and the change trend from beginning to end of growth period was ascending.

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APA: Copy

FARAJI AROUGH, HADI, EBRAHIMI, KHADIJEH, DASHAB, GHOLAM REZA, & ROKOUEI, MOHAMMAD. (2018). Estimation of (co)Variance components of growth curve parameters in Japanese quail. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 49(2 ), 237-246. SID. https://sid.ir/paper/193643/en

Vancouver: Copy

FARAJI AROUGH HADI, EBRAHIMI KHADIJEH, DASHAB GHOLAM REZA, ROKOUEI MOHAMMAD. Estimation of (co)Variance components of growth curve parameters in Japanese quail. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2018;49(2 ):237-246. Available from: https://sid.ir/paper/193643/en

IEEE: Copy

HADI FARAJI AROUGH, KHADIJEH EBRAHIMI, GHOLAM REZA DASHAB, and MOHAMMAD ROKOUEI, “Estimation of (co)Variance components of growth curve parameters in Japanese quail,” IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 49, no. 2 , pp. 237–246, 2018, [Online]. Available: https://sid.ir/paper/193643/en

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