ID | 61456 |
フルテキストURL | |
著者 |
Hori, Kiyosumi
National Agriculture and Food Research Organization, Institute of Crop Science
Saisho, Daisuke
Institute of Plant Science and Resources, Okayama University
Nagata, Kazufumi
National Agriculture and Food Research Organization, Institute of Crop Science
Nonoue, Yasunori
National Agriculture and Food Research Organization, Institute of Crop Science
Uehara-Yamaguchi, Yukiko
RIKEN Center for Sustainable Resource Science
Kanatani, Asaka
RIKEN Center for Sustainable Resource Science
Shu, Koka
National Agriculture and Food Research Organization, Institute of Crop Science
Hirayama, Takashi
Institute of Plant Science and Resources, Okayama University
ORCID
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Yonemaru, Jun-Ichi
National Agriculture and Food Research Organization, Institute of Crop Science
Fukuoka, Shuichi
National Agriculture and Food Research Organization, Institute of Crop Science
Mochida, Keiichi
Institute of Plant Science and Resources, Okayama University
ORCID
Kaken ID
publons
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抄録 | Climate resilience of crops is critical for global food security. Understanding the genetic basis of plant responses to ambient environmental changes is key to developing resilient crops. To detect genetic factors that set flowering time according to seasonal temperature conditions, we evaluated differences of flowering time over years by using chromosome segment substitution lines (CSSLs) derived from japonica rice cultivars "Koshihikari" x "Khao Nam Jen", each with different robustness of flowering time to environmental fluctuations. The difference of flowering times in 9 years' field tests was large in "Khao Nam Jen" (36.7 days) but small in "Koshihikari" (9.9 days). Part of this difference was explained by two QTLs. A CSSL with a "Khao Nam Jen" segment on chromosome 11 showed 28.0 days' difference; this QTL would encode a novel flowering-time gene. Another CSSL with a segment from "Khao Nam Jen" in the region around Hd16 on chromosome 3 showed 23.4 days" difference. A near-isogenic line (NIL) for Hd16 showed 21.6 days' difference, suggesting Hd16 as a candidate for this QTL. RNA-seq analysis showed differential expression of several flowering-time genes between early and late flowering seasons. Low-temperature treatment at panicle initiation stage significantly delayed flowering in the CSSL and NIL compared with "Koshihikari". Our results unravel the molecular control of flowering time under ambient temperature fluctuations.
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キーワード | rice
flowering time
ambient temperature fluctuation
chromosome segment substitution line (CSSL)
quantitative trait locus (QTL)
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発行日 | 2021-01-20
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出版物タイトル |
International Journal of Molecular Sciences
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巻 | 22巻
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号 | 3号
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出版者 | MDPI
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開始ページ | 1024
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ISSN | 1422-0067
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NCID | AA12038549
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資料タイプ |
学術雑誌論文
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言語 |
英語
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OAI-PMH Set |
岡山大学
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著作権者 | © 2021 by the authors.
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論文のバージョン | publisher
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DOI | |
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関連URL | isVersionOf https://doi.org/10.3390/ijms22031024
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ライセンス | http://creativecommons.org/licenses/by/4.0/
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