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Peer-reviewedCC BYBreeding science

A major quantitative trait locus qSBR11 from Oryza sativa 'Milyang 44' confers resistance to rice stink bugs.

  • Masami Tsuzuki1
  • Mitsuru Nakamura1
  • Hiroyuki Kokaji2
  • Hiroto Yamaguchi1
  • Kazuhiko Sugiura1
  • Tomofumi Yoshida1
  • Shuhei Kato1
  • Kenichiro Mori1
  • Hiroko Ohashi1
  • Utako Yamanouchi3
  • Shuichi Fukuoka3
  • Ayahiko Shomura3
2 more authors
  • Koichi Toyokura2
  • Shiro Fukuta1
  1. 1Aichi Agricultural Research Center (AARC), 1-1 Yazako-Sagamine, Nagakute, Aichi 480-1193, Japan.
  2. 2GRA&GREEN Inc., Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan.
  3. 3Institute of Crop Science, National Agriculture and Food Research Organization (NARO), 2-1-1 Kannondai, Tsukuba, Ibaraki 305-8602, Japan.
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Abstract

Stink bugs are major insect pests that damage rice after heading, causing pecky rice and sterility, which significantly reduce grain quality and yield. We identified a major quantitative trait locus (QTL) for stink bug resistance derived from the resistant donor variety 'Milyang 44' and explored DNA markers useful for marker-assisted selection in rice breeding. QTL analysis using an F₅ population (n = 94) identified a major QTL, qSBR11, on chromosome 11, which explained 28.46% of phenotypic variance in Pecky Rice Index. Fine mapping of the BC₁F₃ and BC₅F₃ populations narrowed the candidate region of qSBR11 to approximately 616 kbp. In the validation experiments, individuals selected using the marker C5_indel9205 located within this candidate region showed significantly reduced pecky rice rate. Additionally, the marker genotype was highly consistent with phenotypes of 22 tested varieties, and genomic analysis of 685 accessions from TASUKE+ in the Rice Annotation Project Database showed that the resistant allele was rare in japonica cultivars. Therefore, that qSBR11 is a promising target for breeding japonica rice. This study identified a major QTL for stink bug-induced pecky rice resistance and demonstrated the utility of a reliable DNA marker for practical breeding.

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Cite

BibTeXRIS
BibTeX
@article{tsuzuki2026major,
  title = {{A major quantitative trait locus qSBR11 from Oryza sativa 'Milyang 44' confers resistance to rice stink bugs.}},
  author = {Masami Tsuzuki and Mitsuru Nakamura and Hiroyuki Kokaji and Hiroto Yamaguchi and Kazuhiko Sugiura and Tomofumi Yoshida and Shuhei Kato and Kenichiro Mori and Hiroko Ohashi and Utako Yamanouchi and Shuichi Fukuoka and Ayahiko Shomura and Koichi Toyokura and Shiro Fukuta},
  journal = {Breeding science},
  year = {2026},
  month = jun,
  doi = {10.1270/jsbbs.25084},
  url = {https://europepmc.org/article/MED/42936883},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - A major quantitative trait locus qSBR11 from Oryza sativa 'Milyang 44' confers resistance to rice stink bugs.
AU  - Masami Tsuzuki
AU  - Mitsuru Nakamura
AU  - Hiroyuki Kokaji
AU  - Hiroto Yamaguchi
AU  - Kazuhiko Sugiura
AU  - Tomofumi Yoshida
AU  - Shuhei Kato
AU  - Kenichiro Mori
AU  - Hiroko Ohashi
AU  - Utako Yamanouchi
AU  - Shuichi Fukuoka
AU  - Ayahiko Shomura
AU  - Koichi Toyokura
AU  - Shiro Fukuta
PY  - 2026
DA  - 2026/06/16
JO  - Breeding science
DO  - 10.1270/jsbbs.25084
UR  - https://europepmc.org/article/MED/42936883
AB  - Stink bugs are major insect pests that damage rice after heading, causing pecky rice and sterility, which significantly reduce grain quality and yield. We identified a major quantitative trait locus (QTL) for stink bug resistance derived from the resistant donor variety 'Milyang 44' and explored DNA markers useful for marker-assisted selection in rice breeding. QTL analysis using an F₅ population (n = 94) identified a major QTL, qSBR11, on chromosome 11, which explained 28.46% of phenotypic variance in Pecky Rice Index. Fine mapping of the BC₁F₃ and BC₅F₃ populations narrowed the candidate region of qSBR11 to approximately 616 kbp. In the validation experiments, individuals selected using the marker C5_indel9205 located within this candidate region showed significantly reduced pecky rice rate. Additionally, the marker genotype was highly consistent with phenotypes of 22 tested varieties, and genomic analysis of 685 accessions from TASUKE+ in the Rice Annotation Project Database showed that the resistant allele was rare in japonica cultivars. Therefore, that qSBR11 is a promising target for breeding japonica rice. This study identified a major QTL for stink bug-induced pecky rice resistance and demonstrated the utility of a reliable DNA marker for practical breeding.
SN  - 1344-7610
SN  - 1347-3735
ER  -