Abstract

                                Correlation and path analysis were studied in sixty two single cross, forty two double cross and seven three-way cross derivatives in F4/F5 generation of upland cotton G. hirsutum L. lines generated from crossing among selected hybrids of the All India Coordinated Cotton Improvement Project. Five physiological characters and yield contributing traits were studied at the Agricultural Research Station, Dharwad. Correlation among physiological traits viz. photosynthetic rate, stomatal conductance, transpiration rate, chlorophyll content and relative water content revealed significant correlation with seed cotton yield. Path analysis among physiological characters showed that the traits photosynthesis rate, stomatal conductance and chlorophyll content revealed high positive direct effect on seed cotton yield whereas, transpiration rate and relative water content revealed direct negative effect on seed cotton yield.

Key words : Character association, Gossypium hirsutum, path analysis, physiological characters