Genetic analysis for yield and yield contributing traits
in Salinity tolerant Rice(Oryza sativa L.)
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In the present investigation, thirteen genotypes were tested for salinity and showed wide variation in tolerance for saline toxicity at panicle initiation stage of 6 EC dSm-1 and its score ranged from 1 (highly tolerant) to 9 (highly susceptible). Scoring was done based on IRRI system of classification. The two land races viz., Nona bokra and Pokkali, were highly tolerant (score 1) to salinity followed by FL 478 and CSR 36 which were tolerant (score 3). Three varieties viz., CSR 10, TRY(R) 2 and TRY(R) 3 were moderately tolerant (score 5) and the remaining high yielding popular varieties viz.,...
In the present investigation, thirteen genotypes were tested for salinity and showed wide variation in tolerance for saline toxicity at panicle initiation stage of 6 EC dSm-1 and its score ranged from 1 (highly tolerant) to 9 (highly susceptible). Scoring was done based on IRRI system of classification. The two land races viz., Nona bokra and Pokkali, were highly tolerant (score 1) to salinity followed by FL 478 and CSR 36 which were tolerant (score 3). Three varieties viz., CSR 10, TRY(R) 2 and TRY(R) 3 were moderately tolerant (score 5) and the remaining high yielding popular varieties viz., ADT 37, ADT 42, ADT 43, ADT(R) 47, TNAU Rice ADT 49 and AD 09225 were susceptible to highly susceptible (score 7 to 9) to salinity. Based on the screening results the best five lines (salt susceptible) viz., ADT 37, ADT 42, ADT 43, ADT(R) 47, TNAU Rice ADT 49 and best five testers (salt tolerant) viz., Nona bokra, Pokkali, FL 478, CSR 10 and CSR 36 were taken. ADT 37, ADT 42 and ADT(R) 47 among the lines and FL 478 and Pokkali among the testers were found to be good combiners with desirable gca effects for majority of the yield traits.
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