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Title: | Assessment of Heat-tolerance Potential in QTL Introgressed Lines of Hybrid Rice Restorer, KMR-3R through PS-II Efficiency |
Other Titles: | Not Available |
Authors: | V. Jaldhani, D. Sanjeeva Rao, P. Beulah, B. Srikanth, P. R. Rao, D. Subrahmanyam, P. Sudhakar, A. Krishna Satya, C. N. Neeraja and P. Senguttuvel |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR::Indian Institute of Rice Research |
Published/ Complete Date: | 2021-11-26 |
Project Code: | Not Available |
Keywords: | Hybrid rice; KMR-3R; High-temperature stress; Chlorophyll fluorescence |
Publisher: | Not Available |
Citation: | 22. Jaldhani, V., Rao, D.S., Beulah, P., Srikanth, B., Rao, P.R., Subrahmanyam, D., Sudhakar, P., Satya, A.K., Neeraja, C.N. and Senguttuvel, P., Assessment of Heat-tolerance Potential in QTL Introgressed Lines of Hybrid Rice Restorer, KMR-3R through PS-II Efficiency, International Journal of Environment and Climate Change 11(11): 258-266. |
Series/Report no.: | Not Available; |
Abstract/Description: | Aims: To assess heat-induced PSII damage and efficiency in eight promising backcross introgression lines (BC2F6) of KMR-3R/N22 possessing qHTSF1.1 and qHTSF4.1. Study Design: Randomized Complete Block Design (RCBD) with three replications. Place and Duration of Study: ICAR-Indian Institute of Rice Research, Hyderabad India during wet/rainy (Kharif) season 2018. Methodology: Eight ILs (BC2F6) and parents were evaluated for heat tolerance. The hightemperature stress was imposed by enclosing the crop with a poly cover tent (Polyhouse) just before the anthesis stage. The fluorescence parameters viz., maximum efficiency of PSII photochemistry (Fv/Fm), Electron transport rate (ETR), effective PSII quantum yield (ΦPSII), coefficient of photochemical quenching (qP) and coefficient of non-photochemical quenching (qN) were measured under ambient and high-temperature stress.Results: The heat-tolerance potential of ILs was assessed in terms of PSII activity. The results indicated that significant differences were observed between treatments (T), genotypes (G) and the interaction between T × G. The physiological basis of introgressed QTLs controls the spikelet fertility by maintaining the productive and adaptive strategies in heat-tolerant QTL introgressed lines with stable photosynthetic apparatus (PSII) under high-temperature stress. Conclusion: The Fv/Fm ratio denotes the maximum quantum yield of PSII. The heat-tolerant QTL introgressed lines exhibited stable photosynthetic apparatus (PSII) and noted better performance under high-temperature stress. They may be used as donors for fluorescence traits in breeding rice for high-temperature tolerance. |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Research Paper |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | International Journal of Environment and Climate Change (British Journal of Environment and Climate Change) |
Volume No.: | 11(11) |
Page Number: | 258-266 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | 10.9734/IJECC/2021/v11i1130540 |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/71266 |
Appears in Collections: | CS-IIRR-Publication |
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