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Reference Detail
| Reference | ||
|---|---|---|
| Author | WISSUWA M., Ae N. | |
| Title | Genotypic variation for tolerance to phosphorus de®ciency in rice and the potential for its exploitation in rice improvement | |
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Abstract: Deficiency in phosphorus (P) can severely limit rice yields. Developing cultivars with tolerance to P deficiency may represent a more sustainable solution than sole reliance on fertilizer application. To assess genotypic variation for tolerance to P deficiency the P uptake of 30 genotypes was measured on P-deficient soil. Variation for P uptake was high, ranging from 0.6 to 12.9 mg P/plant. Traditional varieties were superior to modern varieties. A major quantitative trait locus for P uptake had previously been identified in a population developed by crossing the modern variety 'Nipponbare' with the P deficiency-tolerant landrace 'Kasalath'. This quantitative trait locus was transferred to 'Nipponbare' by three backcrosses. Under P deficiency this improved line surpassed `Nipponbare' in P uptake by 170% and in grain yield by 250%. These results show that the genotypic variation for tolerance to P deficiency in rice can be used successfully in rice improvement. By combining high P uptake of the donor variety 'Kasalath' with a high harvest-index characteristic of modern varieties it was possible to more than triple the grain yield of 'Nipponbare' under P deficiency. |
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| Journal | Plant Breeding | |
| Country | Japan | |
| Volume | 120 | |
| Pages | 43-48 | |
| Year | 2001 | |
| PubMed ID | - | |
| PubMed Central ID | - | |
| DOI | - | |
| URL | - | |
| Relation | ||
| Gene | PSTOL1 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
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Stages in Each Organ - Muant Lines (Gene) |
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| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
