| Project/Area Number |
23658014
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Crop science/Weed science
|
|---|
| Research Institution | Tokyo University of Agriculture and Technology |
|---|
Principal Investigator |
HIRASAWA Tadashi 東京農工大学, (連合)農学研究科(研究院), 教授 (30015119)
|
|---|
| Project Period (FY) |
2011 – 2013
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
|
|---|
| Keywords | 光合成 / 気孔伝導度 / 葉肉伝導度 / ゲノム / 量的形質遺伝子座 / イネ / 作物学 / 育種学 / 遺伝学 / 光化学系 / 光合成速度 / 個体成長速度 / 純同化率 / 準同質遺伝子系統 / 炭酸固定効率 / RuBP再生速度 |
|---|
| Research Abstract |
We investigated the cause of extremely high values of Pn in the backcrossed inbred lines derived from the indica variety Takanari and the japonica variety Koshihikari. Compared to Takanari, these lines had neither a higher content nor higher activity of ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) when the leaf nitrogen contents were similar, but they did have high mesophyll conductance with respect to CO2 flux due to their higher density and more highly developed lobes of mesophyll cells. Using 39 lines of Koshihikari chromosome segment substitution in Takanri genetic background, we found four quantitative trait loci for enhancing the rate of leaf photosynthesis of the plants of Takanari genetic background with a Koshihikari allele on chromosome 1, on chromosome 3 and on chromosome 7. We might increase rates of rice-leaf photosynthesis still further by introducing Koshihikari alleles into the plants of Takanari genetic background.
|
