Determination of Phosphorous-deficient Tolerance in Thai Lowland Rice Cultivars Based on Pup1-K46 Marker
Master of Science (Biology (International Program)), 2019
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Prince of Songkla University
2024
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| Online Access: | http://kb.psu.ac.th/psukb/handle/2016/19580 |
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th-psu.2016-195802024-07-25T08:20:08Z Determination of Phosphorous-deficient Tolerance in Thai Lowland Rice Cultivars Based on Pup1-K46 Marker Bophal Sok Upatham Meesawat Faculty of Science (Biology) คณะวิทยาศาสตร์ ภาควิชาชีววิทยา Rice Breeding Thailand Phosphorus Master of Science (Biology (International Program)), 2019 Phosphorus (P) deficiency is one of the major constraints for rice production due to its natural availability. The low P stress affects rice growth and yield, thereby food security. Using genetic markers to determine P-deficient tolerance is a promising tool to improve rice for sustainable production. Phosphate uptake 1 (Pupl-K46) is a diagnostic gene-based marker to confer the P-deficient tolerance in rice. This marker is dominantly conserved in upland ecotypes, but its presence in lowland rice cultivars has not yet been well-understood. In this study, thirty-one of the 61 Thai lowland rice cultivars were detected with the Pup/ region. Twenty to 21 lowland rice cultivars with and without the Pupl-K46 region were then selected and grown under half- or full- strength low P (0.25 or 0.5 mg/l) and high P (5 or 10 mg/l) Yoshida solutions for three or four weeks to determine the P-deficient tolerance, respectively. Results showed that the low P (LP) condition reduced rice biomass, total P concentration, P uptake, and Pi content in the rice tissues, except for chlorophyll content. Interestingly, the Pupl-K46+ cultivars maintained less shoot mass reduction and higher relative efficiency of P use (REP) than the Pupl-K46" cultivars under both LP conditions. Additionally, the Pupl- K46* cultivars accumulated higher root P concentration and P uptake as well as greater amount of Pi content in their shoot and root than the Pupl-K46 cultivars. These suggested that the Pupl-K46+ cultivars were more tolerant to the P starvation by holding superior shoot growth and accumulating higher P uptake and total P concentration via their roots. The Pupl-K46+ cultivars also maintained soluble Pi against low P availability by storing it in cytoplasm. It is therefore confirmed that the Pupl-K46 region empowers lowland rice cultivars to withstand the P deficiency like the upland rice ecotype. 2024-07-25T08:20:08Z 2024-07-25T08:20:08Z 2019 Thesis http://kb.psu.ac.th/psukb/handle/2016/19580 en Attribution-NonCommercial-NoDerivs 3.0 Thailand http://creativecommons.org/licenses/by-nc-nd/3.0/th/ application/pdf Prince of Songkla University |
| institution |
Prince of Songkhla University |
| building |
Khunying Long Athakravi Sunthorn Learning Resources Center |
| continent |
Asia |
| country |
Thailand Thailand |
| content_provider |
Khunying Long Athakravi Sunthorn Learning Resources Center |
| collection |
PSU Knowledge Bank |
| language |
English |
| topic |
Rice Breeding Thailand Phosphorus |
| spellingShingle |
Rice Breeding Thailand Phosphorus Bophal Sok Determination of Phosphorous-deficient Tolerance in Thai Lowland Rice Cultivars Based on Pup1-K46 Marker |
| description |
Master of Science (Biology (International Program)), 2019 |
| author2 |
Upatham Meesawat |
| author_facet |
Upatham Meesawat Bophal Sok |
| format |
Theses and Dissertations |
| author |
Bophal Sok |
| author_sort |
Bophal Sok |
| title |
Determination of Phosphorous-deficient Tolerance in Thai Lowland Rice Cultivars Based on Pup1-K46 Marker |
| title_short |
Determination of Phosphorous-deficient Tolerance in Thai Lowland Rice Cultivars Based on Pup1-K46 Marker |
| title_full |
Determination of Phosphorous-deficient Tolerance in Thai Lowland Rice Cultivars Based on Pup1-K46 Marker |
| title_fullStr |
Determination of Phosphorous-deficient Tolerance in Thai Lowland Rice Cultivars Based on Pup1-K46 Marker |
| title_full_unstemmed |
Determination of Phosphorous-deficient Tolerance in Thai Lowland Rice Cultivars Based on Pup1-K46 Marker |
| title_sort |
determination of phosphorous-deficient tolerance in thai lowland rice cultivars based on pup1-k46 marker |
| publisher |
Prince of Songkla University |
| publishDate |
2024 |
| url |
http://kb.psu.ac.th/psukb/handle/2016/19580 |
| _version_ |
1806509647350202368 |