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https://hdl.handle.net/20.500.14094/90007095
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2024-05-03
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90007095 (fulltext)
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メタデータID
90007095
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open access
出版タイプ
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タイトル
Evaluation of Domestication Loci Associated with Awnlessness in Cultivated Rice, Oryza sativa
著者
Amarasinghe, Yaddehige Priya Jayantha ; Kuwata, Rie ; Nishimura, Akinori ; Phuong Dang Thai Phan ; Ishikawa, Ryo ; Ishii, Takashige
著者名
Amarasinghe, Yaddehige Priya Jayantha
著者名
Kuwata, Rie
著者名
Nishimura, Akinori
著者名
Phuong Dang Thai Phan
著者ID
A1059
研究者ID
1000070467687
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=742dba9c659abe53520e17560c007669
著者名
Ishikawa, Ryo
石川, 亮
イシカワ, リョウ
所属機関名
農学研究科
著者ID
A1029
研究者ID
1000020260648
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=1bd0b031f3884fdd520e17560c007669
著者名
Ishii, Takashige
石井, 尊生
イシイ, タカシゲ
所属機関名
農学研究科
収録物名
Rice
巻(号)
13(1)
ページ
26-26
出版者
SpringerOpen
刊行日
2020-04-28
公開日
2020-05-14
抄録
Background Awns are bristle-like organs at the tips of the glumes. Wild rice has maintained long awns for successful seed propagation through seed dispersal. Seed awning is an interesting trait in rice domestication. Long awns might have been beneficial for seed gatherers in the initial phase of domestication; however, awnless phenotypes were preferably selected in a later phase with non-seed-shattering plants. Investigation of domestication loci associated with awnlessness in cultivated rice will be useful in clarifying the process and history of rice domestication. Results Quantitative trait locus (QTL) analysis for seed awning was carried out using a BC3F2 population between Oryza sativa IR36 (a cultivated donor parent with awnless phenotype) and O. rufipogon W630 (a wild recurrent parent with awns). As a result, two QTLs on chromosome 4 (corresponding to An-1 and LABA1) and one on chromosome 2 (designated as qAWNL2) were detected. Gene interaction among three seed-awning QTLs were further examined with the plants having eight different combinations of homozygous genotypes. Their awn length variation indicated that the IR36 alleles at these loci had the additive awnlessness effects in the genetic background of wild rice. The shortest awn length was observed for the plants having IR36 homozygous alleles at all loci, giving about 75% reduction in awn length. By the fine mapping, the candidate region of the novel qAWNL2 locus was delimited in a 157.4-kb region containing 22 predicted genes in Nipponbare genome. Conclusions QTL analysis revealed that three loci, An-1, LABA1 and qAWNL2, were mainly responsible for the awnlessness of O. sativa IR36. In the wild genetic background, loss-of-function alleles at three awning loci showed additive effects on length reduction. In rice domestication, awnless forms may be gradually generated through the accumulation of mutations at awning loci.
キーワード
Awn
Awnlessness
Domestication
Gene interaction
Oryza rufipogon
QTL mapping
Rice
カテゴリ
農学研究科
学術雑誌論文
権利
© The Author(s). 2020
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
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資源タイプ
journal article
言語
English (英語)
ISSN
1939-8425
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eISSN
1939-8433
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関連情報
DOI
https://doi.org/10.1186/s12284-020-00386-4
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