Journal of FARM SCIENCES, Vol 30, No 1 (2017)

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Determining path of productivity in double cross F1 populations belonging to within and between heterotic group crosses in cotton (Gossypium hirsutum L.)

VINAYAK EDKE, S. S. PATIL

Abstract


The study was initiated to exploit heterotic groups for varietal development in cotton. The Single cross F1srepresenting different heterotic groups viz., stay green (SG), robust (ROB), RGR and compact (COM) were used asparents in diallel (half) mating programme to get within and between double cross F1 populations. The main objective of thisstudy was identify the possible role of all characters contributing towards seed cotton yield along with assessing superiorityand inferiority of genotypes by comparing their performance of most and least productive double cross F1 populations.Top five potential double cross F1 populations as well as bottom five double cross F1 populations were considered forcalculating the per cent deviation of genotypes from group mean. Top five potential double crosses had positive value forseed cotton yield, number of bolls per plant, lint yield, number of monopodia per plant, sympodial length at 50 per centheight, reproductive points on sympodia, seed index, lint index and inter branch distance. This information on path ofproductivity helps to understand the yield traits associated with high and low productivity and helps to achieve desiredlevel of productivity.

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