International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 4
First page : (1468) Last page : (1477)
Article doi: http://dx.doi.org/10.18782/2320-7051.5721
Morpho-Physiological Responses of Rice (Oryza sativa L.) Varieties and Hybrids to High Temperature Stress
R. Ramesh1*, T. Ramesh1, P. R. Rao2, V. G. Shankar3 and M.H.V. Bhave4
1Department of Crop Physiology, 3Department of Genetics and Plant breeding,
4Department of Statistics and Mathematics,
College of Agriculture PJTSAU, Rajendranagar, Hyderabad-500030, Telangana, India
2Division of Plant Physiology, Indian Institute of Rice Research, Rajendranagar, Hyderabad - Telangana, India
*Corresponding Author E-mail: rameshpphy@gmail.com
Received: 2.08.2017 | Revised: 11.08.2017 | Accepted: 13.08.2017
ABSTRACT
Morpho-physiological responses of 21 rice (Oryza sativa L.) cultures including varieties and hybrids were assessed under control and high temperature stress. Physiological and growth parameters were recorded in both control and high temperature stress conditions. The statistical analysis revealed significant differences among varieties for various traits associated with high temperature stress. Temperature had positive significant correlation with SCMR values, spikelet fertility. It recorded negative significant correlation with leaf dry weight, total dry matter, pollen viability, stigma exertion, spikelet sterility and 1000 grain weight. Grain yield registered positive significant correlation with panicle dry weight, total dry matter, chlorophyll fluorescence, stigma exertion, spikelet fertility panicle number, grain number and harvest index under elevated temperature. Hence, these characters could be considered as criteria for selection for higher yield.
Key words: SCMR, Pollen viability, grain yield, Temperature.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Ramesh, R., Ramesh, T., Rao, P.R., Shankar, V.G. and Bhave, M.H.V., Morpho-Physiological Responses of Rice (Oryza sativa L.) Varieties and Hybrids to High Temperature Stress, Int. J. Pure App. Biosci.5(4): 1468-1477 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5721
