The chromosome regions for increasing early growth in rice: role of sucrose biosynthesis and NH4+ uptake
Article
Article Title | The chromosome regions for increasing early growth in rice: role of sucrose biosynthesis and NH4+ uptake |
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ERA Journal ID | 5306 |
Article Category | Article |
Authors | Nagai, Yuki (Author), Matsumoto, Kouichi (Author), Kakinuma, Yuri (Author), Ujiie, Kazuhiro (Author), Ishimaru, Ken (Author), Gamage, Dananjali M. (Author), Thompson, Michael (Author), Milham, Paul (Author), Seneweera, Saman (Author) and Hirotsu, Naoki (Author) |
Journal Title | Euphytica: international journal on plant breeding |
Journal Citation | 211 (3), pp. 343-352 |
Number of Pages | 10 |
Year | 2016 |
Publisher | Springer |
Place of Publication | Netherlands |
ISSN | 0014-2336 |
1573-5060 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s10681-016-1743-x |
Web Address (URL) | http://link.springer.com/content/pdf/10.1007%2Fs10681-016-1743-x.pdf |
Abstract | To elucidate the mechanism of plant growth we investigated chromosome region affecting traits (CRATs) using the chromosome segment substitution lines derived from a cross between japonica ‘Koshihikari’ and indica ‘Kasalath’ using rice (Oryza sativa L.). Four CRATs associated with increased plant growth rate were identified which were derived from ‘Kasalath’ alleles on chromosomes 1, 6, 8 and 12. This was achieved by evaluating the net dry weight gain from seed germination to 30 day-old seedlings. Physiological analysis of substitution lines containing a ‘Kasalath’ allele chromosome segment in the ‘Koshihikari’ background revealed that the CRAT on chromosome 1 (EGR1 ) increased the relative growth rate by increasing the net assimilation rate (NAR), and increased expression of the OsSPS1 gene that encodes the rate-limiting enzyme in sucrose synthesis. In contrast, CRATs on chromosomes 6, 8 and 12 (EGR6 , EGR8 and EGR12 ) were associated with an increased uptake of NH4+, the major nitrogen source for rice. These results suggest that early growth of rice is controlled by multiple traits and sucrose biosynthesis and NH4+ uptake play key roles. |
Keywords | Quantitative trait locus (QTL); rice; growth analysis; sucrose phosphate synthase; nitrogen uptake; seedling growth |
ANZSRC Field of Research 2020 | 300406. Crop and pasture improvement (incl. selection and breeding) |
300402. Agro-ecosystem function and prediction | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Toyo University, Japan |
National Institute of Agrobiological Sciences, Japan | |
Centre for Crop Health | |
University of Western Sydney | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3853/the-chromosome-regions-for-increasing-early-growth-in-rice-role-of-sucrose-biosynthesis-and-nh4-uptake
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