Author(s):

R Ramesh, T Ramesh, PR Rao, VG Shankar and MHV Bhave

Abstract: Present experiment was taken up entitled “evaluation of rice genotypes for high temperature tolerance under field conditions in rice at Indian Institute of Rice Research, Rajendranagar, Hyderabad during kharif, 2012-2013 and 2013-2014 in split-plot design with treatments (control and high temperature stress) as main plot treatments and 22 genotypes as sub-plot treatments. The high temperature treatment was imposed by covering the one set of genotypes with polyethylene sheet to raise the temperature and allowed to grow inside the enclosure from panicle initiation until physiological maturity. From the studies, it is concluded that superior performance in terms, Crop phenology, morphological, physiological traits, reproductive characters and yield components were significantly affected by the high temperature stress and such affects varied with rice genotypes. Under high temperature stress conditions crop duration was reduced where such reduction was maximum in IET-22116(134), while it was least affected in N-22(118).

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