Abstract
Genetic effects on fiber quality parameters in six basic populations (P1, P2, F1, F2, BC1 and BC2) of crosses viz. TARZAN-1×
CIM-602 and A-555×FH-114 were investigated through GMA. The outcomes of the current study envisaged that additive and
dominant alongside non-allelic interactions assumed a significant role for the attributes like fiber length and fiber maturity in
both crosses, however, additive genetic actions [d] were observed to be imperative for fiber uniformity, fineness and bundle
strength. Epistatic gene interactions were present almost in all the quality traits in one or other cross, whereas linkage was
prominently observed in bundle strength and fineness. All the fiber traits showed high genetic variance and genetic advance
except fiber length where genetic gain was relatively low under normal and water stressed conditions. Inverse indication of [h]
and [i] anticipated duplicate genes in the legacy of fiber fineness and length that will bring plant breeders in trouble during
selection. Hence, heterosis breeding would be a better choice because complementary gene interaction was absent in all quality
traits.
