S.K. Verma1*, M.S. Xalxo1, R.R. Saxena1 and S.B. Verulkar2
1. Department of Genetics and Plant Breeding, IGKV, Raipur – 492 012
2. Department of Plant Molecular Biology and Biotechnology, IGKV, Raipur – 492 012
*Email: sunil.verma244@gmail.com
Abstract: In Chhattisgarh, rice is also grown during summer season in about 2 lakh hectares, mainly in areas with canal irrigation. Usually the productivity during summer is higher than Kharif season. However, in this season the sowing is usually done in the month of December or January during which the minimum temperature is low, which results in poor seedling establishment, stunting, yellowing and mortality. To overcome the problem of damage caused by low temperature, rice breeders have been making efforts to develop more cold-tolerant cultivars mainly at seedling stage.In this study, 17 different genotypes, including commonly grown varieties, were screened under field condition during December-January 2011 and 2012 during seedling stage at Research cum Instructional Farm, IGKV,Raipur (C.G.). The minimum temperature during this period was below 10oC at-least for a12 days. Lines were evaluated on 1-9 score according to SES of rice, IRRI.GenotypesSamleshwari,Annadaand R-RF-75 showed dark green leaf colourwith score 1, while Sahbhagidhan and IR-84887-B-15 exhibited yellowing of leaf with score of 9 and 7, respectively. The result of this study is discussed in context of breeding value and practical significance from farmers’ point-of-view.
Keywords: Rice Oryza sativa L., cold tolerance, seedling stage screening
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