Analysis of Non-Genetic Factors Influencing Reproductive Traits of Japanese Black Heifer

International Ruminant Seminar: "Eco-friendly livestock production for sustainable agriculture"

农业科学;生态环境科学

Setiaji, A.^1,2,3 ; Oikawa, T.^1,2

Faculty of Agriculture, University of the Ryukyus, Okinawa, Japan^1

United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima

890-0065, Japan^2

Faculty of Animal and Agricultural Sciences, Diponegoro University, Semarang-Central-Java, Indonesia^3

关键词: Artificial insemination;    Genetic effects;    Genetic factors;    Number of services;    Reproductive performance;    Reproductive traits;    Standard values;    Statistical modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/119/1/012026/pdf
DOI  :  10.1088/1755-1315/119/1/012026

来源: IOP

【 摘 要 】

This study aimed was to identify non-genetic factors strongly associated with reproductive traits on Japanese Black heifer. Artificial insemination and calving records were analyzed to investigate non-genetic effect on reproductive performances. A total of 2220 records of heifer raised between 2005 and 2016 were utilized in this study. Studied traits were first service non return rate to 56 days (NRR), first service pregnancy rate (FPR), days from first to successful insemination (FSI), number of services per conception (NSC), age at first calving (AFC), and gestation length (GL). Test of significance for effects in the statistical model was performed using GLM procedure of SAS 9.3. The yearling trend was plotted on the adjusted mean of parameters, by the least square mean procedure. Means of NRR, FPR, FSI, NSC, AFC and GL were 72%, 53%, 52.71 days, 1.76, 760.71 days and 288.26 days, respectively. The effect of farm was significant (P