Comparative Efficiency of Three Selection Methods for Yield and Quality of Cotton (Gossypium hirsutum L.)
Nov 2, 2018
The comparative efficiency of three selection methods, honeycomb pedigree selection (HC), pedigree selection (PS) and single-seed descent (SSD), was assessed in an F2 cotton population in two locations. The best five lines derived by each method in each location after five cycles of selection, along with check varieties were tested in comparative experiments in the F6 generation at both locations. The analysis of variance revealed significant differences for yield and quality within lines and locations but the genotype x location interaction was not significant for any of the traits studied except the mean boll weight. On the basis of the mean yield and the number of superior lines derived by each method as compared to the check varieties, HC lines were superior to PS and SSD lines in seed cotton yield, fiber length and mean boll weight. HC lines, however were not better than the best check cultivar Eva. No significant differences were identified between the material of the three methods in plant height, lint percentage and fiber strength. The lines that originated from the PS method were not significantly different in seed cotton yield from those originating from the SSD method. Finally, the material derived by PS was earlier in maturity than the material derived by HC and SSD.