Indian Society of Genetics & Plant Breeding

Mechanism of anoxic tolerance in backcross lines developed through Jyothi x Swarna-Sub 1 under submergence stress

Published on

Rice varieties adapted to flash flood exhibit submergence
tolerance by maintaining reduced shoot elongation under
submerged conditions. In this study physiological traits
leading to flash flood tolerance
viz., high survival
percentage with reduced shoot elongation under
submergence and increased rate of alcoholic fermentation
were investigated.
Sub1 introgressed BC3F2 lines exhibited
higher survival percentage with moderate shoot elongation
under submergence stress for fourteen days similar to the
donor parent Swarna- Sub1. Enzymatic activities of alcohol
dehydrogenase and pyruvate decarboxylase were
monitored for fourteen days under submergence stress.
The developed
Sub1 introgressed lines and the donor parent
Swarna-Sub1 showed higher rates of alcohol
dehydrogenase and pyruvate decarboxylase activities under
submergence stress thereby maintaining optimum rates of
alcoholic fermentation. The findings of this study confirmed
the expression of tolerance mechanism in the
introgressed Jyothi Backcross Inbred lines under
submergence stress.

Keywords: Submergence tolerance, reduced shoot elongation, alcohol fermentation, alcohol dehydrogenase activity, pyruvate decarboxylase activity


Year: 2020
Volume: 80
Issue: 4
Article DOI: 10.31742/IJGPB.80.4.2
Print ISSN: 0019-5200
Online ISSN: 0975-6906



Download PDF