Effect of Genotype by Environment Interaction on Accuracy of Genomic Evaluation for Milk Production Traits in Holstein Cattle of Iran

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Mohammad Nazari Behrouz; NEJATI JAVAREMI ARDESHIR; MORADI SHAHRBABAK MOHAMMAD; ABDOLLAHI ARPANAHI ROSTAM

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Journal: Journal of Animal Production Year:2020 | Volume:22 | Issue:4 Page(s): 515-527

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Title

Effect of Genotype by Environment Interaction on Accuracy of Genomic Evaluation for Milk Production Traits in Holstein Cattle of Iran

Author(s)

Mohammad Nazari Behrouz | NEJATI JAVAREMI ARDESHIR | MORADI SHAHRBABAK MOHAMMAD | ABDOLLAHI ARPANAHI ROSTAM | Issue Writer Certificate

Keywords

Cross-ValidationQ1

Dairy CattleQ1

Genomic EvaluationQ1

Random Regression ModelQ2

Temperature-Humidity indexQ2

Abstract

In order to evaluate the effect of genotype by environment interaction on production traits of Holstein cattle of Iran, first lactation test day records of 344170, 135000 and 156840 of milk, fat and protein yield on 34417, 13500 and 15684 cows and SNP markers of 1935 genotyped bulls were used. The production data were retrieved from the Animal Breeding Center and Productions Improvement of Iran’ s database which were collected from 2013 to 2018. To consider the interaction of genotype and environment, mean of Temperature-Humidity index (THI) in three days before each test day records as continuous environmental effect were retrieved from the 35 closest meteorological stations in the vicinity of 139 Holstein herds from 13 provinces. Variance and covariance components were estimated through a single-trait Random Regression Model with orthogonal Legendre polynomials of second order for days in milk and THI using AIREMLF90 software. The results showed that changes in THI across lactation led to fluctuations in additive genetic variance over time. The change in heritability of milk production traits over lactation followed the same trend as additive genetic variance. The results from Cross-Validation analysis showed that including genomic information into the predictive model, increased prediction accuracy and including THI information increased unbiasedness. Due to the changes in milk production of daughters of bulls across days and THI, genotype by environment interaction should be considered when selecting bulls under different conditions.

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APA: Copy

Mohammad Nazari, Behrouz, NEJATI JAVAREMI, ARDESHIR, MORADI SHAHRBABAK, MOHAMMAD, & ABDOLLAHI ARPANAHI, ROSTAM. (2020). Effect of Genotype by Environment Interaction on Accuracy of Genomic Evaluation for Milk Production Traits in Holstein Cattle of Iran. JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE), 22(4 ), 515-527. SID. https://sid.ir/paper/399495/en

Vancouver: Copy

Mohammad Nazari Behrouz, NEJATI JAVAREMI ARDESHIR, MORADI SHAHRBABAK MOHAMMAD, ABDOLLAHI ARPANAHI ROSTAM. Effect of Genotype by Environment Interaction on Accuracy of Genomic Evaluation for Milk Production Traits in Holstein Cattle of Iran. JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE)[Internet]. 2020;22(4 ):515-527. Available from: https://sid.ir/paper/399495/en

IEEE: Copy

Behrouz Mohammad Nazari, ARDESHIR NEJATI JAVAREMI, MOHAMMAD MORADI SHAHRBABAK, and ROSTAM ABDOLLAHI ARPANAHI, “Effect of Genotype by Environment Interaction on Accuracy of Genomic Evaluation for Milk Production Traits in Holstein Cattle of Iran,” JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE), vol. 22, no. 4 , pp. 515–527, 2020, [Online]. Available: https://sid.ir/paper/399495/en

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