Relation between body condition score and conception rate of Japanese Black cows

Setiaji, Asep; Oikawa, Takuro; Arakaki, Daichi

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Anim Biosci > Accepted Articles

Article

https://doi.org/10.5713/ab.22.0329 [Accepted] Published online May 2, 2023.

Relation between body condition score and conception rate of Japanese Black cows

Asep Setiaji^1,*

, Takuro Oikawa²

, Daichi Arakaki²

¹Department of Animal Science, Faculty of Animal and Agricultural Sciences, Universitas Diponegoro, Tembalang Campus, Semarang 50275, Central Java, Indonesia
²Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan

Correspondence: Asep Setiaji, Tel: +62-24-747-4750, Fax: +62-24-747-4750, Email: asepsetiaji93@gmail.com

Received: 29 August 2022 • Revised: 6 January 2023 • Accepted: 2 March 2023

Abstract

Objective
This study analyzes interactions of body condition score (BCS) with other factors and the effect of BCS on estimates of genetic paremeters of conception rate (CR) in Japanese Black cows.
Methods
Factors affecting CR were analyzed through the linear mixed model, and genetic parameters of CR were estimated through the threshold animal model. Result: The interactions between BCS and each season and the number of artificial inseminations (AI) was significant (p<0.05), but that between BCS and parity showed no significance for CR. High CR was observed with BCS 3 in autumn (0.56 ± 0.01) and BCS 4 in summer (0.56 ± 0.02). The highest CR with BCS 3 (0.56 ± 0.02) and BCS 4 (0.55 ± 0.01) was observed at first AI. With BCS 5, however, the highest CR (0.55 ± 0.08) was observed at second AI.
Conclusion
The model with BCS was notably conducive to the estimation of genetic parameters because of a low deviance information criterion (DIC) of heritability that, nevertheless, was slightly lower than the model without BCS.

Keywords: Body Condition Score; Conception Rate; Heritability; Threshold Animal Model