Genetic diversity studies in recombinant lines from interspecific cross of G. hirsutum x G. barbadense*

摘要

Genetic diversity in 24 derivatives of F 8 generation of cross between G. hirsutum var. DS-28 and G. barbadense var. SB (YF)-425 assessed using Mahalanobis D2 statistics, indicated presence of considerable diversity. The genotypes were grouped into eight clusters based on plant morphological, yield and yield contributing characters. They also formed five clusters based on fibre quality traits. The contribution of various characters towards the expression of genetic divergence indicated that seed cotton yield per ha (kg) contributed highest (42.39 per cent) followed by boll number (21.01%) and number of sympodia (14.86%) whereas, uniformity ratio contributed to 18.12 per cent followed by ginning out turn (16.30%) and lint index (14.13%) based on fibre quality traits.