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Natural variation in Early flowering1 contributes to early flowering in japonica rice under long days

Cited 27 time in Web of Science Cited 29 time in Scopus
Authors
Kwon, Choon-Tak; Yoo, Soo-Cheul; Koo, Bon-Hyuk; Cho, Sung-Hwan; Park, Joon-Wo; Zhang, Zhanying; Li, Jinjie; Li, Zichao; Paek, Nam-Chon
Issue Date
2014-01
Publisher
John Wiley & Sons Ltd
Citation
Plant, Cell & Environment Vol.37 No.1, pp. 101-112
Keywords
농수해양Early Heading3Hd16casein kinase Iheading-date QTL
Abstract
Natural variation in heading-date genes enables rice, a short-day (SD) plant, to flower early under long-day (LD) conditions at high latitudes. Through analysis of heading-date quantitative trait loci (QTL) with F-7 recombinant inbred lines from the cross of early heading H143' and late heading Milyang23 (M23)', we found a minor-effect EarlyHeading3 (EH3) QTL in the Hd16 region on chromosome 3. We found that Early flowering1 (EL1), encoding casein kinase I (CKI), is likely to be responsible for the EH3/Hd16 QTL, because a missense mutation occurred in the highly conserved serine/threonine kinase domain of EL1 in H143. A different missense mutation was found in the EL1 kinase domain in Koshihikari. In vitro kinase assays revealed that EL1/CKI in H143 and Koshihikari are non-functional. In F-7:9 heterogeneous inbred family-near isogenic lines (HNILs), HNIL(H143) flowered 13 days earlier than HNIL(M23) in LD, but not in SD, in which EL1 mainly acts as a LD-dependent flowering repressor, down-regulating Ehd1 expression. In the world rice collection, two types of non-functional EL1 variants were found in japonica rice generally cultivated at high latitudes. These results indicate that natural variation in EL1 contributes to early heading for rice adaptation to LD in temperate and cooler regions.
ISSN
0140-7791 (print)
1365-3040 (online)
Language
English
URI
http://hdl.handle.net/10371/91403
DOI
https://doi.org/10.1111/pce.12134
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College of Agriculture and Life Sciences (농업생명과학대학)Dept. of Plant Science (식물생산과학부)Journal Papers (저널논문_식물생산과학부)
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