SCREENING FOR WATER-LOGGING TOLERANCE IN EARLY CLONAL GENERATION OF SUGARCANE
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Date
2022
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DRPCAU, PUSA
Abstract
An experiment on screening for water-logging (water depth of 25 to 45 cm from July to September) tolerance in early clonal generation of sugarcane was conducted during 2021-22 at SRI, Dr. RPCAU, Pusa, Samastipur, Bihar. Twenty four clones were planted in augmented design along with two checks (CoP 16437 and CoP 2061) and data was recorded for the following characters viz., germination at 45 DAP (%), number of shoots at 120 DAP (000/ha), plant height at harvest (cm), cane diameter at harvest (cm), single cane weight (kg), number of millable canes at harvest (000/ha), number of aerial roots/node, HR Brix in November, December, January and cane yield (t/ha).
All the observed data for the attributes were evaluated for statistical analysis using analysis of variance, correlation coefficient analysis and path coefficient analysis. For all of the measures, the analysis of variance indicated highly significant differences among the clones. Characters namely, germination % at 45 DAP, number of shoots at 120 DAP, cane diameter
at harvest and number of millable canes at harvest showed positively significant correlation with cane yield, whereas, number of aerial roots per node showed negative correlation with cane yield. Traits viz., germination % at 45 DAP, number of shoots at 120 DAP, cane diameter at harvest, single cane weight, number of millable canes at harvest, HR Brix in November had direct and positive effect on cane yield, among these, number of millable canes at harvest showed highest direct and positive effect followed by single cane weight on cane yield, whereas, plant height at harvest, number of aerial roots per node, HR Brix in December and January showed negative direct effect on cane yield.
On the basis of brix value, clones namely CoX 20068, CoX 20055, X 20035, CoX 20246, X 20022, CoX 20069, X 20030, CoX 20054, CoX 20056 were identified as early maturing sugarcane clones. Based on the brix value, cane yield and morphological performance eight clones namely CoX 20069, CoX 20068, CoX 20055, X 20030, X 20035, CoX 20054, CoX 20056, CoX 20246 can be selected for further utilization in breeding programme under water-logging condition. In all the clones, cane was non flowering and non- lodging.