RICE LANDRACES WITH GENETIC VARIATIONS FOR SALINITY TOLERANCE AND THEIR ASSOCIATION WITH SUBMERGENCE TOLERANCE
Journal Title: International Journal of Genetics - Year 2015, Vol 7, Issue 2
Abstract
In coastal regions, both salinity and submergence stress alternatively or simultaneously become severe constrain to the rice cultivation by climate changes. This situation necessitates the search of combined tolerance to salinity and submergence stress from the source of germplasms lines. In this study, eight rice landraces collected from coastal region of eastern India were screened for salinity and submergence tolerance at phenotypic and genotypic level. In salinity screening, six rice landraces (Rupsal, Marishal, Polai, Talmugra, Kamini and Raspangar) were identified as salinity tolerant. In PCR screening using SSR markers located in Saltol locus, Pokkali alleles (tolerant check) for AP3206 and RM3412 markers and non-Pokkali alleles for RM8094 marker were detected in salinity tolerant genotypes. The results of RM8094 coincided with that of salinity screening. Moreover, none of the landraces showed significant tolerance as FR13A (tolerant check) in submergence screening. In PCR screening using SSR and gene-specific markers of Sub1 locus, FR13A alleles were documented in intolerant genotypes also. However, the results of Sub1BC2 (InDel) marker coincided with that of submergence screening.
Authors and Affiliations
S. BHARATHKUMAR, P. J. PRAGNYA, K. JITENDRA, B. ARCHANA, M. NIHARIKA, N. NUPUR, P. M. DURGA, J. N. REDDY
Keywords
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