Update info.Tools - Reference - Detail
Reference Detail
| Reference | ||
|---|---|---|
| Author | Obara M., Takeda T., Hayakawa T., Yamaya T. | |
| Title | Mapping quantitative trait loci controlling root length in rice seedlings grown with low or sufficient NH+4 supply using backcross recombinant lines derived from a cross between Oryza sativa L. and Oryza glaberrima Steud | |
|
Abstract: To understand genetic adaptation of rice to environmental nitrogen status, this study mapped and verified the quantitative trait locus/loci for root elongation in response to exogenous NH+4 concentration. Significant inhibition of root elongation by increasing NH+4 concentration in hydroponic culture was observed in seedlings of Oryza sativa cv Taichung 65 (japonica variety) but not in O. glaberrima line IRGC 104038. A total of 161 backcross recombinant lines between these species were employed to map the quantitative trait locus/loci controlling root length of seedlings grown hydroponically with a low (5 莠ｮM) or sufficient NH+4 (500 莠ｮM) supply. Five quantitative trait locus/loci were detected: two on chromosome 1 and three singles on chromosomes 2, 3, and 6. The quantitative trait locus/loci qRL1.1 was significant under sufficient NH+4 supply. Progeny analysis using heterogeneous inbred-type family nearly isogenic lines (HIF-NILs) for the candidate region of qRL1.1 revealed that seminal roots of IRGC 104038-fixed genotypes were significantly longer (12.4 or 11.6%) than those of Taichung 65-fixed genotypes when grown with 500 莠ｮM NH+4, but not without or with 5 莠ｮM NH+4. qRL1.1 was confirmed and delimited within a 4-Mbp-long region on the long-arm region of chromosome 1. Comparative mapping with genes for NH+4 uptake and nitrogen metabolism showed the apparent location of the aspartate aminotransferase gene (OsAAT2) within the candidate region of qRL1.1. Together, the results suggest that qRL1.1 is an adaptive quantitative trait locus/loci for rice root elongation in response to sufficient supply of external NH+4 and OsAAT2 may be a candidate gene responsible for qRL1.1. 諱ｯ 2011 Japanese Society of Soil Science and Plant Nutrition. |
||
| Journal | Soil Science and Plant Nutrition | |
| Country | Japan | |
| Volume | 57 | |
| Pages | 80-92 | |
| Year | 2011 | |
| PubMed ID | - | |
| PubMed Central ID | - | |
| DOI | - | |
| URL | - | |
| Relation | ||
| Gene | ABC1 AMT1;1 AMT1;2 AMT1;3 AMT2;1 AMT2;2 AMT2;3 AMT3;1 AMT3;2 AMT3;3 ASN ASN1 GDH1 GDH2 GDH3 GLN1;1 GLN1;2 GLN1;3 GLT1 GLT2 GOT1 GS2 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
|
Lethal Embryo Mutantion Strain |
- | |
|
Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
