Author(s):

Withanawasam DM, Madhavilatha K, Syamala P, Aparna E, Swarajyalakshmi BN, Vinod MN, Amarnath K, Ramana Rao PV, Sudhakar P, Ravindra Reddy B and Lakshminarayana R Vemireddy

Abstract: High temperature resulted from global warming will be one of a major issue for sustainable rice productivity across the world. Varietal improvement through marker-assisted QTL pyramiding and precise phenotyping are alternatives for supplying future rice demand. In this study, 29 rice QTL pyramided lines with qSSP_F10 and qHT6 derived from IR64/N22 cross was screened by temperature induction response (TIR) technique for their thermotolerance. Of these PLs, PL405, PL352, PL81, PL425 and PL76 had shown better thermotolerance. QTL pyramiding with a precise screening of segregants by TIR can be used as techniques for improvement of thermotolerance rice varieties.

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