Genetics and order effects of seed cotton yield in upland cotton (Gossypium hirsutum L.) - Triallel analysis

Abstract

The yield of seed cotton (Gossypium hirsutum L.) is a complex character. The information on gene action for seed cotton yield is very essential for deciding the effective selection method in segregating generations. The additive and dominance gene effects may have great value on the improvement of seed cotton yield. The information on epistatic gene effect is also important for the yield improvement in cotton, therefore, the analysis of the gene action of seed cotton y(eld through triallel analysis proposed by Rawlings and Cockerham [1] and further developed by Ponnuswamy et al. [2] was made through this study. All possible 60 three-way crosses (TWC) involving six divergent upland cotton genotypes viz., MCU 5, MCU 7, TCH 1002, SVPR 1, Sharada and JR 36 were utilized and triallel analysis was under taken according to Ponnuswamy et al. [2].