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Asian Journal of Plant Sciences

Year: 2005 | Volume: 4 | Issue: 4 | Page No.: 435-437
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Authors

S.K. Natarajan

M. Ganapathy

R. Nagarajan

S. Somasundaram

Keywords

Research Article

Screening of Rice Accessions for Yield and Yield Attributes Contributing to Salinity Tolerance in Coastal Saline Soils of Tamil Nadu, South India

S.K. Natarajan, M. Ganapathy, R. Nagarajan and S. Somasundaram
A field experiment was conducted in the saline field of Annamalai University, experimental farm, Annamalai Nagar during Kharif season of 2000-2001, to study the screening of rice accessions for growth and yield attributes contributing to salinity tolerance. The experiment was laid out in Randomized Block Design with three replications. Fifteen rice accessions from the International Rice Soil Stress Tolerance Screening Nursery Trial (IRSSTN) of IRRI were used for the study. Based on the grouping, the rice accessions were grouped into High Yielding Tolerant (HYT), High Yielding Susceptible (HYS), Low Yielding Tolerant (LYT) and Low Yielding Susceptible (LYS). The results revealed that the rice accessions of the high yielding and tolerant group recorded a higher value for the yield characters viz., number of productive tillers/hill, number of filled grains/panicle and thousand grain weight in which Rice Acc. No. 12 (IR-60494-2B-18-3-2-3) recorded the highest value for yield characters. The rice accession of the high yielding and tolerant group recorded a higher value for the grain and straw yield of which Rice Acc. No. 12 (IR-60494-2B-18-3-2-3) recorded the highest value for grain and straw yield. Based on the results of the investigations, it clearly indicates the direct effects of growth and yield attributes on the higher yield of rice accessions for salinity tolerance. It appears that the number of productive tillers/hill, number of filled grains/panicle and thousand grain weight had direct influence on the grain yield of rice accessions grouped in high yielding and tolerant category for saline soils.
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