Joint Segregation of High Glanding with Nectariless and Frego Bract in Cotton

Abstract

There are mutant alleles in the genus Gossypium that increase the tolerance to insect pests. Among the features that are effective against different insects, high glanding and nectariless increase the tolerance to Lepidoptera insects whereas frego bracts difficult the ovipositions of boll weevil Anthonomus grandis Boheman. It is necessary to incorporate these traits in elite genotypes. The objectives of this research were to transfer the high glanding feature to frego-bract and nectariless plants. For the combination high glanding with frego bract, the frequency of individuals with both features varied from 6 % in the F2 generations to 24 % in the F3. For the other combination, high glanding with nectariless, the frequency of recombination was of 7.,3% in the F2 and 11.,8% in the F3. Therefore, it is possible to combine the high-glanding feature with frego bracts or nectariless in the same line.