GENOTYPE-ENVIRONMENT INTERACTION IN YIELD OF HILL COTTON GENOTYPES

Abstract

The experiment was conducted at the Chittagong Hill Tracts (CHT) areas of Bangladesh i.e. Bandarban, Rangamati and Khagrachari during May to September 2014 to study the genotype environment interaction effect on yield of some selected hill cotton genotypes. The experiment consisted of two factors: Factor A: Location (3 locations) - L1: Bandarban; L2: Rangamati and L3: Khagrachari; Factor B: Different cotton genotypes- G1: HCG-4; G2: HCG-13, G3: HCG-15, G4: HCG-21, G5: HCG-26, G6: HCG-42, G7: HCG-51 and V8: HC-1 (Check). The two factors experiment was laid out in split-plot design with three replications where location factor was assigned in main plot (Bandarban, Rangamati and Khagrachari) and cotton genotypes in sub-plot. In case of location environment, the maximum boll per plant was recorded from Bandarban (19.13) whereas the minimum boll per plant from Rangamati (16.23). The highest single boll weight was recorded from Bandarban (4.65 g) whereas the lowest from Rangamati (3.92 g). The highest seed cotton yield per hectare was recorded from Bandarban (1825 kg), whereas the lowest seed cotton yield per hectare from Rangamati (1691 kg). The highest lint yield per hectare was recorded from Khagrachari (809 kg), whereas the lowest lint yield per hectare from Rangamati (681 kg). For genotypes, maximum boll per plant (24.61), single boll weight (5.18 g), seed cotton yield per hectare (2170 kg) and lint yield per hectare (927 kg) was observed in HCG-13 and lowest value was observed in check variety HC-1 for all the cases. In case of interaction of environments and genotypes, highest boll per plant (27.03), single ball weight (5.29 g), seed cotton yield per hectare (2170 kg), lint yield per hectare (981 kg) was observed in HCG-13 at Bandarban than the Rangamati and Khagrachari. In all the environments check HC-1 gave the lowest value. Genotype HCG-13 was found highest yielder than the other genotypes and showed better performance at Bandarban than the Rangamati and Khagrachari.