Correlation, path analysis and selection indices in mid-late maturing clones of sugarcane.

摘要

An experiment was conducted to evaluate 17 genotypes of mid-late maturing clones of sugarcane for existing variation for cane yield and its attributing character during cropping season of 2006-07. The result revealed that characters which showed positive and highly significant correlation with sugar yield were number of shoots at 120 days after planting, number of shoots at 240 days after planting, number of millable canes at 12 months, single cane weight (kg) at 12 months, cane height (cm) at 12 months and cane yield (t/ha) at harvest at both genotypic and phenotypic levels. Out of these characters number of millable canes at 12 months and single cane weight showed high positive direct contribution towards the sugar yield at phenotypic level. Top ranking three genotypes selected on the basis of yield and yield contributing traits were BO 147, BO 146 and Co 0235, which can further be utilized in breeding program for yield improvement of sub-tropical mid-late maturing sugarcane.