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Affiliation |
Faculty of Agriculture Region of Animal and Plant Biosciences |
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Professor |
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Contact information |
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Related SDGs |
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INOUE Keichi
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Degree 【 display / non-display 】
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博士（農学） ( 2016.3 神戸大学 )
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修士（農学） ( 1997.3 東北大学 )
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学士（農学） ( 1995.3 帯広畜産大学 )
Professional Memberships 【 display / non-display 】
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日本暖地畜産学会
2023.4
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畜産システム研究会
2022.4
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肉用牛研究会
2000.4
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日本畜産学会
1996.3
Papers 【 display / non-display 】
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Analysis of inbreeding, population structure, and genetic diversity in the Kumamoto sub-breed of Japanese Brown cattle Reviewed International coauthorship
16 ( 16 ) 2587 2026.8
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Genomic autosomal contribution to total additive and non-additive genetic effects for carcass weight and beef marbling in Japanese Black cattle. Reviewed
2026 ( 1 ) 2285374 2026.7
Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)
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Prediction of parturition using vaginal temperature measurement system and analysis of factors contributing to dystocia in Japanese Black cows Reviewed
( 120 ) 5 - 11 2026.1
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal)
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Relationships between feed efficiency, growth and carcass traits in Japanese Black cattle Reviewed
ASADA Masatsugu, INOUE Keiichi, MASUDA Yasuhisa, NAGURA Yoshio, FUJIHARA Shinichi, KIKUCHI Takumi
Nihon Chikusan Gakkaiho 94 ( 3 ) 283 - 293 2023.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Animal Science
The objectives of this study were to investigate the efficiency of measuring individual feed intake and to clarify the relationships between residual feed intake (RFI) and economic traits of fattening cattle in the field progeny test. The feed intake, body weight and carcass traits were obtained for the total of 480 Japanese Black steers (240) and heifers (240), and their RFI were calculated by their feed intake and body weight. Fattening period was separated early and late, and correlations between the periods and the whole fattening period were calculated to investigate their relationships. To clarify the relationships between RFI and economic traits, the RFI was divided into four quartiles and means of the traits were compared among the RFI quartile groups. In the correlations for RFI of each diet among fattening period, there were strong correlations between the late and whole fattening periods on concentrate and total feed intakes. This suggested that the RFI of the animals for the whole fattening period could estimate by the RFI based on concentrate feed intake in the late period. The daily TDN intake during the fattening period in the first (best) RFI group was 12% lower than that in the fourth (worst) RFI group. In steers, mean RFI in the first group was -0.921 kg/day which was 1.8 kg/day lesser than that in the fourth group, implying that animals with superior RFI can reduce the production cost for farmers. Means of growth and carcass traits in the first group were similar to the fourth group. These results suggest that feed intake in the field progeny test can measure efficiently and selection for the RFI from the test can reduce feed intake and improve productivity without affecting growth and carcass traits.
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Nishio M., Inoue K., Ogawa S., Ichinoseki K., Arakawa A., Fukuzawa Y., Okamura T., Kobayashi E., Taniguchi M., Oe M., Ishii K.
BMC Genomics 24 ( 1 ) 376 2023.7
Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Genomics
Background: Pedigree-based inbreeding coefficients have been generally included in statistical models for genetic evaluation of Japanese Black cattle. The use of genomic data is expected to provide precise assessment of inbreeding level and depression. Recently, many measures have been used for genome-based inbreeding coefficients; however, with no consensus on which is the most appropriate. Therefore, we compared the pedigree- (FPED) and multiple genome-based inbreeding coefficients, which were calculated from the genomic relationship matrix with observed allele frequencies (FGRM), correlation between uniting gametes (FUNI), the observed vs expected number of homozygous genotypes (FHOM), runs of homozygosity (ROH) segments (FROH) and heterozygosity by descent segments (FHBD). We quantified inbreeding depression from estimating regression coefficients of inbreeding coefficients on three reproductive traits: age at first calving (AFC), calving difficulty (CD) and gestation length (GL) in Japanese Black cattle. Results: The highest correlations with FPED were for FROH (0.86) and FHBD (0.85) whereas FGRM and FUNI provided weak correlations with FPED , with range 0.33–0.55. Except for FGRM and FUNI , there were strong correlations among genome-based inbreeding coefficients (≥ 0.94). The estimates of regression coefficients of inbreeding depression for FPED was 2.1 for AFC, 0.63 for CD and -1.21 for GL, respectively, but FPED had no significant effects on all traits. Genome-based inbreeding coefficients provided larger effects on all reproductive traits than FPED . In particular, for CD, all estimated regression coefficients for genome-based inbreeding coefficients were significant, and for GL, that for FUNI had a significant. Although there were no significant effects when using overall genome-level inbreeding coefficients for AFC and GL, FROH provided significant effects at chromosomal level in four chromosomes for AFC, three chromosomes for CD, and two chromosomes for GL. In addition, similar results were obtained for FHBD . Conclusions: Genome-based inbreeding coefficients can capture more phenotypic variation than FPED . In particular, FROH and FHBD can be considered good estimators for quantifying inbreeding level and identifying inbreeding depression at the chromosome level. These findings might improve the quantification of inbreeding and breeding programs using genome-based inbreeding coefficients.
MISC 【 display / non-display 】
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熊本系褐毛和種の改良効率の向上と遺伝的多様性確保の取り組み ～持続的な褐毛和種の生産・改良システム開発事業について～ Invited
井上慶一
LIAJ News ( 215 ) 12 - 14 2026.4
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)
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ゲノム情報を用いた和牛のおいしさの遺伝的改良について Invited
井上慶一
知財ぷりずむ ( 283 ) 6 - 12 2026.4
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)
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ゲノム情報による褐毛和種の遺伝的多様性の評価と多様性を考慮した交配様式の開発
井上慶一
令和5年度食肉に関する助成研究調査成果報告書 42 160 - 165 2024.11
Authorship：Lead author Publishing type：Internal/External technical report, pre-print, etc.
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ゲノム情報による黒毛和種の遺伝的多様性の評価
井上慶一
令和5年度畜産生産に関する研究調査成果報告書 14 1 - 3 2024
Authorship：Lead author Publishing type：Internal/External technical report, pre-print, etc.
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枝肉6形質以外の新たな形質のゲノミック評価、SNP情報の遺伝的多様性確保への利用の検討 Invited
井上慶一
和牛の地域特性活用ゲノム選抜定着化事業報告書 1 - 7 2023.3
Authorship：Lead author Language：Japanese Publishing type：Internal/External technical report, pre-print, etc.
Presentations 【 display / non-display 】
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The Effects of Adding 5-Aminolevulinic Acid and Glucose to Late-Stage Quail Fertilized Embryos International conference
Event date： 2026.10.28 - 2026.10.31
Language：English Presentation type：Poster presentation
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黒毛和種における分集団が遺伝的多様性に与える影響
金明煥、井上慶一、一関可純、細野真彦、福澤陽生、竹田将悠規、石田孝史
第134回日本畜産学会大会 2026.9.17
Event date： 2026.9.15 - 2026.9.18
Presentation type：Oral presentation (general)
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デュロック種における異なる部位の脂肪酸組成間および脂肪色との遺伝的関係
大野結子、井上慶一、奥村寿章、吉田有里、松本和典、松田征馬、福井洋介、佐藤心
第134回日本畜産学会大会 2026.9.17
Event date： 2026.9.15 - 2026.9.18
Presentation type：Oral presentation (general)
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染色体別の非相加的遺伝効果の推定
井上慶一
第20回統計遺伝育種研究会 2025.11.7
Event date： 2025.11.7 - 2025.11.8
Language：Japanese Presentation type：Oral presentation (general)
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デュロック種の皮下脂肪内層の脂肪酸組成と産肉成績における遺伝的パラメータの推定
大野結子、井上慶一、奥村寿章、吉田有里、松本和典、福井洋介、松田征馬、佐藤心
第18回日本暖地畜産学会佐賀大会 2025.10.25
Event date： 2025.10.25 - 2025.10.26
Language：Japanese Presentation type：Oral presentation (general)
Awards 【 display / non-display 】
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第53回優秀畜産技術者賞、第53回優秀畜産技術者特別賞、平成30年度農林水産省生産局長賞
2019.6 畜産技術協会
井上慶一
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日本畜産学会賞
2019.3 日本畜産学会
井上慶一
Award type：Award from Japanese society, conference, symposium, etc.
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English Presentation Award
2017.9 日本畜産学会
井上慶一
Award type：Award from Japanese society, conference, symposium, etc.
Grant-in-Aid for Scientific Research 【 display / non-display 】
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ゲノム情報による非相加的遺伝効果と近交を考慮した和牛の産肉成績予測手法の開発
Grant number：24K09203 2024.04 - 2027.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(C)
Authorship：Principal investigator
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機械学習を利用したゲノム情報による黒毛和種の遺伝的能力評価法の開発
Grant number：22K05977 2022.04 - 2026.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(C)
Authorship：Coinvestigator(s)
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ゲノム情報による黒毛和種の産肉性に関する非相加的遺伝様式の解明と育種改良への応用
Grant number：21K05905 2021.04 - 2025.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(C)
Authorship：Coinvestigator(s)
