Cold stress at seedling stage is a major constraint in boro rice production. Nine boro rice lines were crossed in diallel fashion excluding reciprocals to obtain 36 crosses. All the 36 crosses along with parents were grown in nursery in three seasons (boro-2014, kharif-2015 and boro-2015). Performance of seedlings for survival per cent, chlorophyll content, relative water content, membrane stability index was recorded just before transplanting in all the three seasons. Scoring for cold tolerance was done in both boro seasons. Gautam showed highest survival rate over three seasons. Among crosses, IR 64 x Krishna Hamsa showed highest survival (84%) in boro-2014, MTU 1010 x Jaya (86.33%) in boro-2015 and MTU 1010 x Krishna Hamsa (95.67%) in kharif-2015. Jaya x Krishna Hamsa was most cold tolerant cross over both boro seasons. Significant positive correlation was observed among survival per cent, chlorophyll content, relative water content and membrane stability index over seasons.
Chlorophyll content, Cold tolerance, Membrane stability index, Relative water content, Seedlings
Basuchaudhuri, P. (2014). Cold tolerance in rice cultivation. CRC Press, Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton.
Dutta, D. and Pathak, P. K. (2007). Response of assam rice varieties to low temperature stress. Journal of Plant Genetic Resources, 20(1): 57-63
Habibi, F. Normahamadi, Sharifabad, H., Eivazi, A. and Heravan, M. (2011). Effect of cold stress on cell membrane stability, chlorophyll a and b contain and proline accumulation in wheat (Triticum aiestivum L.) variety. African Journal of Agricultural Research, 6(27): 5854-5859
IRRI (2002). Standard evaluation systems for rice. International rice research institute, Metro City Manila, Philippines, 35
Jan, M., Shinwari, K. I., Shah, G., Khan, M. H. U., Ullah, S., Hameed, A. and Malook, I. (2015). Consequences of short term low temperature stress on physiological and biochemical aspects of rice (Oryza sativa L.). Scientia Agriculturae, 10 (1): 1-14
Mata, C. G. and Lamattina, L. (2001). Nitric Oxide induces stomatal closure and enhances the adaptive plant responses against drought stress. Plant Physiology. 126: 1196–1204
Pathak, P. K., Saud, R. K., Bora, D. K., Singh, K. D. and Pathak, A. K. (1999). Status of boro rice in Assam: A case study. International Rice Commission Newsletter, 48: 60-66
Priyanka, K., Jaiswal, H. K., Waza, S. A. and Sravan, T. (2015). Response of rice seedlings to cold tolerance under boro conditions. SABRAO Journalof Breeding and Genetics, 47 (2): 185-190
Sairam, R. K., Rao, K. V. and Srivastava, G. C. (2002). Differential response of wheat genotypes to long term salinity stress in relation to oxidative stress, antioxidant activity and osmolyte concentration. Plant Science, 163: 1037-1046
Singh, I., Kumar, U., Singh, S. K., Gupta, C., Singh, M. and Kushwaha, S. R. (2012). Physiological and biochemical effect of 24-epibrassinoslide on cold tolerance in maize seedlings. Physiol Mol Biol Plants, 18(3):
Yadegari, L. Z., Heidari, R. and Carapetian, J. (2007). The influence of cold acclimation on proline, malondfialdehyde (MDA), total protein and pigments contents in soybean (Glycine max) seedling.J. Biol. Sci., 7(8): 1141-1436
Yamada, T., Jones, E. S., Congan, N. O., Vecchies, A. C., Nomura, T. and Hisano, H. (2004). QTL analysis of morphological, developmental, and winter hardiness-associated traits in perennial ryegrass. Crop Sci., 44: 925-935
Yoshida, S. (1981). Fundamentals of rice crop science. International Rice Research Institute, Los Ba~nos.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)