Int.J.Curr.Microbiol.App.Sci (2017) 6(7): 1187-1192 1187 Original Research Article https://doi.org/10.20546/ijcmas.2017.607.144 Estimation of Extent of Variability for Various Productive Traits in Sugarcane under Water-Logged Condition Praveen Kumar * , Balwant Kumar and Khushboo Chandra Department of Plant Breeding and Genetics, Dr. Rajendra Prasad Central Agricultural University, Pusa-848125 (Bihar), India *Corresponding author ABSTRACT Introduction Sugarcane is a perennial, tropical; monocotyledonous crop which is cultivated in tropical and sub- tropical region of the world primarily for its ability to store high concentration of sugar in the inter-node and propagate through stem cutting. It grows under varied soil and climatic conditions, but its productivity is generally limited by abiotic and biotic stresses, as it has to face vagaries of nature during its yearlong life in the field. National production of it is 366.80 million tones and productivity is 69.20 t/ha whereas productivity in Bihar is 50 t/ha (2014-15, Indian Sugar February, 2016). In India 10 -30 per cent of sugarcane area is affected by water logging which is one of the major constraints affecting crop productivity in the Indo- Gangetic belt and the coastal area about 73 per cent annual rainfall in India is received during the southwest monsoon (June to September) which is primary cause for water logging. North Bihar is main sugarcane growing tract where about 35-40 per cent of sugarcane cultivated area remains water- logging during monsoon season which coincides with the grand growth period of the crop. In water-logged areas, cane yield generally declined by 15-20 per cent. If the water-logging is in the early stage of crop growth it affects the germination, tillering and International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 7 (2017) pp. 1187-1192 Journal homepage: http://www.ijcmas.com An investigation was carried out with the eighteen high sucrose containing sugarcane clones to estimate the extent of variability for various productive traits under water-logged condition. The analysis of variance revealed highly significant differences among the clones for fourteen traits and significant for rest traits viz., germination % at 45 DAP, plant height at 150 days, single cane weight and purity % at 10 month stage. The Variability studies showed high estimates of GCV and PCV for traits viz., length of aerial root and dry weight of aerial roots. In present set of materials high heritability with high genetic advance as per cent of mean was found in length of aerial root. Similarly, high heritability with moderate genetic advance as percent of means was observed for plant height at 240 days, height at 360 days, pol per cent at 12 month stage and single cane weight, indicating the role of dominant genetic effects in determination of these characters and its improvements. Keywords Sugarcane, Water logging, Variability, PCV, GCV, Heritability, Genetic advance. Accepted: 17 June 2017 Available Online: 10 July 2017 Article Info