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Comprehensive Analysis of Candidate Genetic Variants for Elucidating the Mechanism of Intramuscular Fat Deposition in Cattle

Research Project

Project/Area Number 22K05969
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 42010:Animal production science-related
Research InstitutionKobe University

Principal Investigator

SASAZAKI SHINJI  神戸大学, 農学研究科, 准教授 (50457115)

Co-Investigator(Kenkyū-buntansha) 川口 芙岐  神戸大学, 農学研究科, 助教 (00879968)
万年 英之  神戸大学, 農学研究科, 教授 (20263395)
大山 憲二  神戸大学, 農学研究科, 教授 (70322203)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2024: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords黒毛和種 / 牛肉 / 脂肪交雑 / 遺伝子 / ウシ / 和牛
Outline of Research at the Start

これまでに牛肉の脂肪交雑を支配するゲノム候補領域については多くの報告がなされているものの、主要な責任遺伝子変異は未だ解明されていない。申請者らは先行研究においてゲノムワイド関連解析を行い、責任変異の位置する有力な候補領域を同定した。さらに、全ゲノムリシーケンスを行い、候補領域内に存在する全てのDNA変異を網羅的に検出した。本研究では、一度に多くの遺伝子座を判定可能である集積流体回路を活用し、上記で検出した候補多型を検証することにより、脂肪交雑に関わる遺伝子と責任変異の同定を試み、脂肪交雑形成機構の解明に向けて新たな知見を得ることを目的とする。

Outline of Final Research Achievements

Genotyping was conducted on 96 SNPs selected from a total of 127,090 polymorphisms within the candidate QTL region for beef marbling (chromosome 7, 10ー30 Mbp) identified in our previous studies. An LD block map was created, and as a result, the candidate region was substantially narrowed down to 0.3 Mbp (15.8ー16.1 Mbp). Subsequently, a genome sequencing analysis was performed on the Miyazaki population, detecting 1,846 polymorphisms (SNPs) within the candidate region. An analysis of variance (ANOVA) assessing the association with BMS (Beef Marbling Standard) revealed that an amino acid substitution in the ICAM (Intercellular Adhesion Molecule) gene exhibited the highest effect, suggesting it is a strong candidate for the causal gene of beef marbling.

Academic Significance and Societal Importance of the Research Achievements

和牛の脂肪交雑を支配する遺伝子および遺伝子変異を同定するべく、これまでに国内外を問わず多くの研究がなされてきたが、脂肪交雑を支配する主要な責任遺伝子および変異は未だ解明されていない。本研究の結果、7番染色体の候補領域を大幅に絞り込むことに成功し、その中でもICAM遺伝子上のアミノ酸置換が脂肪交雑と非常に高い効果を示した。以上、我が国を代表する黒毛和種の象徴である脂肪交雑についてその遺伝的要因の解明、および脂肪交雑をコントロールすることのできるDNAマーカーの開発に向けて、本研究の結果は有益な情報となりえると考えられる。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (4 results)

All 2024 2023 2022

All Journal Article (2 results) Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Comprehensive genotyping analysis of single nucleotide polymorphisms responsible for beef marbling in Japanese Black cattle2024

    • Author(s)
      Sasazaki Shinji、Kondo Hina、Moriishi Yurika、Kawaguchi Fuki、Oyama Kenji、Mannen Hideyuki
    • Journal Title

      BMC Genomic Data

      Volume: 25 Issue: 1 Pages: 17-17

    • DOI

      10.1186/s12863-024-01199-w

    • Related Report
      2024 Annual Research Report 2023 Research-status Report
  • [Journal Article] Verification of Candidate SNP Effects Reveals Two QTLs on BTA7 for Beef Marbling in Two Japanese Black Cattle Populations2022

    • Author(s)
      Shinji Sasazaki, Raito Yamamoto, Shintaro Toyomoto, Hina Kondo, Takayuki Akiyama, Namiko Kohama, Emi Yoshida, Fuki Kawaguchi, Kenji Oyama and Hideyuki Mannen
    • Journal Title

      Genes

      Volume: 13 Issue: 7 Pages: 1190-1190

    • DOI

      10.3390/genes13071190

    • Related Report
      2022 Research-status Report
  • [Presentation] Comprehensive verification of all SNPs within a QTL region suggested that ICAM gene polymorphisms would be responsible for beef marbling in Japanese Black cattle2024

    • Author(s)
      Shinji Sasazaki, Hina Kondo, Yurika Moriishi, Fuki Kawaguchi, Kenji Oyama, Hideyuki Mannen
    • Organizer
      31th Plant & Animal Genome Conference
    • Related Report
      2024 Annual Research Report 2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Verification of Candidate SNP Effects Reveals Two QTLs on BTA7 for Beef Marbling in Two Japanese Black Cattle Populations2023

    • Author(s)
      Shinji Sasazaki, Raito Yamamoto, Shintaro Toyomoto, Hina Kondo, Namiko Kohama, Emi Yoshida, Eiji Iwamoto, Fuki Kawaguchi, Kenji Oyama and Hideyuki Mannen
    • Organizer
      30th Plant & Animal Genome Conference
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2022-04-19   Modified: 2026-01-16  

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