Genetics of salt tolerance in rice (Oryza sativa L.)
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Abstract
An attempt has been made to study the genetics of salt tolerance adopting generation mean analysis involving eight crosses in rice (QlJlza sativa L.). The eight crosses involved four salt tolerant genotypes (lET 14543, lET 14552, SSRC 92058 and SSRC 92076) and two susceptible genotypes (TKM 9 and ADT 36). Six generations viz., Pl , P2, F1, F2, BCl and BC2 of each cross were raised in a randomized block design with three replications during February 1997 at Pandit Jawaharlal Nehru College of Agriculture and Research Institute Karaikal with saline water. The irrigation water used in the study, as per United States Soil Salinity Laboratory (USSL) classification (1), is saline-alkaline as indicated by high Sodium Adsorption Ratio (SAR) and Residual Sodium Carbonate (RSC) respectively (EC =2.44 dS/m, pH =8.40, SAR = 22.40 and RSC = 18.60 meq/l). The spacing was 30 cm between rows and 20 cm within rows. The total number of plants raised in each replication was 30 for parents and Fl' 60 for backcross generations and 200 for F2's. Observations on days to 50% flowering, plant height, productive tillers plant-l , grain number panicle-l , spikelet sterility, panicle length (cm) and grain yield plant-l were recorded on 10 plants each on parents and Fl' 120 plants in F2 and 35 plants each in BCl and BC2 generations. The means and variances of means of the seven traits were computed for each generation of all the crosses. The genetic effects were estimated using the models suggested by Mather and Jinks [2].
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Thirumeni, S., Subramanian, M., & Paramasivam, K. (2001). Genetics of salt tolerance in rice (Oryza sativa L.). INDIAN JOURNAL OF GENETICS AND PLANT BREEDING, 63(01), 75–76. https://doi.org/.
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Research Article
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