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Browsing Thesis by Author "Agrawal, Rupesh Kumar"
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ThesisItem Open Access Identification of sugarcane varieties tolerant to water-logging condition.(Rajendra Agricultural University, Pusa (Samastipur), 2015) Agrawal, Rupesh Kumar; Kumar, BalwantIn a field experiment 16 varieties including two checks were planted with three replications in RBD at Paddy Block, RAU, Pusa, Samastipur, Bihar during 2012-13 under low land area where its grand growth phase coincides with water-stagnation depth 40-45 cm for three months to identify Sugarcane varieties tolerant to water-logging condition. Investigation was carried out on variability, character association, path analysis and genetic divergence for the traits viz, Germination Percentage at 45 days, Number of Shoots at 120 days, Plant Height at 150, 240 and 360 days, Cane diameter, NMC, Single Cane weight, Red Rot Score, Brix at 10,11 and 12 month, Pol at 10, 11 and 12 month, Purity at 10, 11 and 12 month, CCS Per cent at harvest and Cane yield. Mean performance of four varieties viz. BO154, CoP092, CoX07067 and BO155 were found superior for most of the traits as well as it showed resistant to moderately resistant against red rot disease. Highly significant variation was observed for all traits except purity at 10 and 11 month stage and CCS percent at harvest it was due to the fact that these varieties were derived from parents having different ‘backgrounds’ geographical one i.e; originated at Pusa, Coimbatore, Sahjahanpur, Lucknow, Pantnagar, Seorahi. High heritability coupled with high genetic advance as per cent of mean found for traits viz. number of shoots at 120 days, plant height at 240 and 360 days and single cane weight which will in favor of direct selection. Highly significant and positive correlation were exhibited between cane yield and cane diameter, number of number of millable canes, plant height at 150,240 and 360 days, single cane weight, germination per cent at 45 days and CCS per cent at harvest. Maximum positive direct effect on cane yield was exhibited by single cane weight followed by NMC, plant height at 150 days and CCS per cent at harvest while negative direct effect on cane yield showed by cane diameter, number of shoots at 120 days and plant height at 240 and 360 days. Five clusters were obtain by D2 statistics, cluster II has 8 varieties and cluster I having 5 varieties while rest clusters were monogenotypic. The maximum inter cluster distance was observed between cluster IV and V followed by cluster III and V, cluster I and V and cluster II and IV. Maximum contribution in the manifestation of genetic divergence was exhibited by cane yield followed by CCS per cent at harvest. Four varieties viz. BO154, CoP092, CoX07067 and BO155 were identified as water-logging tolerant varieties coupled with high to moderate sucrose on the basis of CCS (t/ha) and morphological appearance of plant at the time of harvest.