Abstract
In order to evaluate genotypic variation, we measured leaf photosynthetic rate (Pn) and its associated factors for the rice diversity research set of germplasm (RDRS) selected from the Genebank in National Institute of Agrobiological Sciences (NIAS). Pn showed large genotypic variation from 11.9 to 32.1 μmol m−2 s−1. The variation in stomatal conductance to CO2 (Gs) explained about 50% of that in Pn, while that in nitrogen concentration (N) in leaves explained about 35%. The genotype group which mainly consists of aus type indica tended to have higher Gs, and the genotype group which corresponds to japonica had a higher nitrogen concentration (N) in leaves. The relationships of Pn with Gs and N were not significantly different among genotype groups, suggesting photosynthetic efficiencies are similar among genotype groups.
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Notes
When RDRS was distributed to us, RDRS consisted of 64 genotypes. The latest RDRS included five genotypes more (Kojima et al. 2005).
Abbreviations
- 1WAH:
-
1 week after heading
- 2WBH:
-
2 weeks before heading
- Δ:
-
Carbon isotope discrimination
- Ci :
-
Intercellular CO2 concentration
- Ca :
-
Ambient CO2 concentration
- DTH:
-
Days to heading from sowing
- Gs :
-
Stomatal conductance to CO2
- I1:
-
A genotype group corresponding to aus type indica
- I2:
-
A genotype group corresponding to indica except aus
- J:
-
A genotype group corresponding to japonica
- N:
-
Nitrogen weight per unit leaf area
- N%:
-
Nitrogen percentage in leaf dry matter
- PAR:
-
Photosynthetically active radiation
- Pn:
-
Leaf photosynthetic rate
- QTL:
-
Quantitative trait loci
- RFLP:
-
Restriction fragment length polymorphism
- SSR:
-
Single-sequence repeat
- RDRS:
-
Rice diversity research set of germplasm
- RubisCO:
-
Ribulose-1,5-bisphosphate carboxylase/oxygenase
- VPD:
-
Vapor pressure deficit
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Acknowledgments
Rice diverse research set of germplasm (RDRS) used in this study was distributed by the Genebank of the National Institute of Agrobiological Science (NIAS), Japan. Special thanks are due to Dr. K. Ebana and Dr. Y. Uga of the NIAS for their comments to this study. We also thank Dr. T. Takai for giving us the information of RDRS.
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Kanemura, T., Homma, K., Ohsumi, A. et al. Evaluation of genotypic variation in leaf photosynthetic rate and its associated factors by using rice diversity research set of germplasm. Photosynth Res 94, 23–30 (2007). https://doi.org/10.1007/s11120-007-9208-7
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DOI: https://doi.org/10.1007/s11120-007-9208-7