Vol. 5, Issue 6 (2017)
Effect of temperature regimes on biochemical traits of rice (Oryza sativa L.) genotypes for high temperature tolerance
Author(s): Amareshkumar J, Dr. Amaregouda A, Dr. RP Patil, Dr. K. Mahantashivayogayya and Dr. B. S. Janagoudar
Abstract: High temperature stress is the one of the most important environmental factors that influencing growth, development, and yield of rice crop. The present paper studies the effects of temperature regimes on various biochemical parameters at different stages of growth for high temperature tolerance using the 50 IRRI and Indian rice genotypes with five check (Local, national and international) varieties were evaluated during normal sown (December-2014) and late sown conditions (January 2015). Result of the experiment reveals that late sowing of genotypes particularly in the month of January has shown the decreased various biochemical responses and yield attributes than the normal sown genotypes. Grain yield was lowest under late sown condition (11.92% reduction) as compared to normal sown condition, which was expected that plant experienced the high temperature stress mainly during flowering and grain filling stages. The results of mean sum of squares due to the genotypes and their interaction were significant for different biochemical parameters. Finally, among the screened genotypes EC792239, EC792185, EC792179, EC792240 and EC792316 are identified as heat stress tolerant genotypes. Hence, they are shown better performance for different biochemical parameters like chlorophyll a (3.49 mg/g Fw), chlorophyll b (2.24 mg/g Fw) and chlorophyll a/b ratio (6.93 mg/g Fw), pollen viability (97.90%) and protein and amylase content of grains. They could be used as potential donors for development of heat stress tolerant variety.
Pages: 1376-1382 | 703 Views 42 Downloads
How to cite this article:
Amareshkumar J, Dr. Amaregouda A, Dr. RP Patil, Dr. K. Mahantashivayogayya, Dr. B. S. Janagoudar. Effect of temperature regimes on biochemical traits of rice (Oryza sativa L.) genotypes for high temperature tolerance. Int J Chem Stud 2017;5(6):1376-1382.