Screening of QTL pyramided rice lines for thermotolerance by thermal induction response (TIR) technique

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 qSSPF10 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.