Abstract:

In order to study genetic analysis of fiber quality traits of interspecific hybrid of G. barbadense×G. hirsut um, five G. hirsutum varieties as female parents and five G. barbadense varieties were crossed, and 25 hybrids were obtained. The randomized block design was taken to 25 F1 combinations. The results showed that there existed significant or extremely significant difference for main fiber traits except micronaire between upland cotton parents; in addition to elongation, other traits were significant or very significant difference between island cotton; and parents’ interaction for the fiber quality traits were not significant. The genetic parameters showed that the trend between genetic and phenotypic variation coefficient was consistent for fiber length, strength and micronaire, and all were greater than the environment. Uniformity and elongation of the genetic variation coefficient were less than the environment; this means that environmental factors can not be ignored in variation of the two traits. The broad inheritance of fiber length, strength and micronaire were high, so these traits should be selected in early generations, when good fiber quality traits of G. barbadense×G. hirsutum was utilized by interspecific crossing.