ウスリアン梨の梨皮抵抗性遺伝子Rvn1は,受容体のようなタンパク質エチレン誘導キセラゼ (EIX) 遺伝子群に含まれています

Sogo Nishio¹, Shingo Terakami², Takushi Yoshida³

¹Institute of Fruit Tree and Tea Science, NARO (NIFTS), 2-1 Fujimoto, Tsukuba, Ibaraki, 305-8605, Japan. nishio.sogo998@naro.go.jp.

BMC plant biology

|September 2, 2025

まとめ

研究者たちは,受容体のようなエチレン誘発キシラナーゼ (EIX) 遺伝子が,アジアの梨のに対する耐性の鍵の要素であることを特定しました. この発見は,梨の品種に耐久性の発達を助長する.

科学分野:

植物病理学
遺伝学
園芸科学

背景:

ベンチュリア・ナシコーラ (Venturia nashicola) はアジア産の梨の生産に深刻な影響を与えている.
既存の単一遺伝子の耐性は進化する病原体によって克服されることが多い.
耐久性には多様な遺伝子の統合が必要です

研究の目的:

アジアの梨のカビ耐性遺伝子Rvn1を特定し特徴づけること.
ベンチュリア・ナシコーラに対する耐性の遺伝的根拠を理解するために
繁殖プログラムにおけるマーカー・アシスト・セレクションのための分子ツールを開発する.

主な方法:

Rvn1遺伝子の精細なマッピングは,複数の集団でゲノタイプ化を使用します.
関連種 (リンゴ,梨) との比較シーケンス分析
トランスクリプトの特徴と発現分析のためのISO-SeqとRNA-seq.
遺伝子の起源を推測するための集団構造分析

主要な成果:

Rvn1遺伝子は,特定の 30,281-bp領域に細かくマッピングされました.
Rvn1の強い候補として,受容体のようなエチレン誘導キセラゼ (EIX) 遺伝子が特定されました.
このEIX遺伝子は,耐性品種と病原体接種時に有意なアップレギュレーションを示した.
Rvn1に関連した分子マーカーが開発されました.

結論:

アジアの梨のRvn1の耐性遺伝子の強い候補は,受容体のようなEIX遺伝子である.
特定された遺伝子の発現パターンは耐性におけるその役割を支持する.
開発された分子マーカーは,耐久性のある耐性繁殖のためのマーカー支援の選択を容易にするでしょう.

キーワード:

微細なマッピングピルス・ピリフォリアベンチュリア・ナシコーラ抵抗性の遺伝子

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