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<p>Rice blast, caused by <i>Magnaporthe oryzae</i>, is one of the most serious threats to global rice production, highlighting the need for effective resistance breeding. This study demonstrates the utility of molecular markers in detecting key blast resistance genes in 259 Korean rice cultivars (<i>japonica</i> group). Among the identified genes, <i>Piz-t/Piz-5</i> and the <i>Pita</i> + <i>Pita-2</i> combination emerged as the most significant contributors to blast resistance. <i>Piz-t/Piz-5</i> showed the strongest and most stable resistance, especially in early-maturing cultivars, making it a valuable target for breeding programs focused on early-ripening rice. The <i>Pita</i> + <i>Pita-2</i> combination provided broad-spectrum resistance across all maturity groups, functioning independently of the number of pyramided genes. These findings suggest that <i>Piz-t/Piz-5</i> is effective as a single gene in early-maturing cultivars, while the <i>Pita</i> + <i>Pita-2</i> combination can be strategically used in diverse japonica rice varieties. This study provides a practical framework for enhancing blast resistance through marker-assisted selection, aiding the development of more resilient and high-yielding Korean rice cultivars.</p>

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Genotypic characterization of blast resistance genes in korean rice cultivars using molecular markers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月16日

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  • Seung-Kyo Jeong,
  • Byung Jun Jin,
  • Hyun-Sook Lee,
  • Yoonsung Lee,
  • So-Myeong Lee,
  • Jin-Kyung Cha,
  • Hyeonjin Park,
  • Ju-Won Kang,
  • Sumin Jo,
  • Woo-Jae Kim,
  • Dong-Soo Park,
  • Ji-Yoon Lee,
  • Jong-Min Jeong,
  • Jong-Hee Lee,
  • Youngho Kwon

摘要

Rice blast, caused by Magnaporthe oryzae, is one of the most serious threats to global rice production, highlighting the need for effective resistance breeding. This study demonstrates the utility of molecular markers in detecting key blast resistance genes in 259 Korean rice cultivars (japonica group). Among the identified genes, Piz-t/Piz-5 and the Pita + Pita-2 combination emerged as the most significant contributors to blast resistance. Piz-t/Piz-5 showed the strongest and most stable resistance, especially in early-maturing cultivars, making it a valuable target for breeding programs focused on early-ripening rice. The Pita + Pita-2 combination provided broad-spectrum resistance across all maturity groups, functioning independently of the number of pyramided genes. These findings suggest that Piz-t/Piz-5 is effective as a single gene in early-maturing cultivars, while the Pita + Pita-2 combination can be strategically used in diverse japonica rice varieties. This study provides a practical framework for enhancing blast resistance through marker-assisted selection, aiding the development of more resilient and high-yielding Korean rice cultivars.