Identification of QTLs for rice brown spot resistance in backcross inbred lines derived from a cross between Koshihikari and CH45
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- Matsumoto Kengo
- Mie Prefecture Agricultural Research Institute Present address: Mie Prefectural Government
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- Ota Yuya
- Mie Prefecture Agricultural Research Institute
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- Seta Satomi
- Mie Prefecture Agricultural Research Institute
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- Nakayama Yukinori
- Mie Prefecture Agricultural Research Institute
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- Ohno Teppei
- Mie Prefecture Agricultural Research Institute
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- Mizobuchi Ritsuko
- National Agriculture and Food Research Organization (NARO), Institute of Crop Science
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- Sato Hiroyuki
- National Agriculture and Food Research Organization (NARO), Institute of Crop Science
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<p>Rice brown spot (BS), caused by Bipolaris oryzae, is one of the major diseases of rice in Japan. Quantitative resistance has been observed in local cultivars (e.g., CH45), but no economically useful resistant variety has been bred. Using simple sequence repeat (SSR) polymorphic markers, we conducted quantitative trait locus (QTL) analysis of BS resistance in backcross inbred lines (BILs) from a cross between indica CH45 (resistant) and japonica Koshihikari (susceptible). On the basis of field disease evaluations in 2015 and 2016, four QTLs contributing to BS resistance were identified on chromosomes 2 (qBSR2-kc), 7 (qBSR7-kc), 9 (qBSR9-kc), and 11 (qBSR11-kc). The ‘CH45’ alleles at qBSR2-kc, qBSR7-kc, and qBSR11-kc and the ‘Koshihikari’ allele at qBSR9-kc increased resistance. The major QTL qBSR11-kc explained 23.0%–25.9% of the total phenotypic variation. Two QTLs (qBSR9-kc and qBSR11-kc) were detected in both years, whereas the other two were detected only in 2016. Genetic markers flanking these four QTLs will be powerful tools for marker-assisted selection to improve BS resistance.</p>
収録刊行物
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- Breeding Science
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Breeding Science 67 (5), 540-543, 2017
日本育種学会
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詳細情報 詳細情報について
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- CRID
- 1390282679698723200
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- NII論文ID
- 130006318318
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- NII書誌ID
- AA11317194
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- ISSN
- 13473735
- 13447610
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- NDL書誌ID
- 028736991
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 使用不可