The present investigation carried out to evalu-ate and estimate the stability of 13 Egyptian cotton genotypes(G.barbadense L.)for seed cotton yield character from two categories(1)long staple,i.e. 5 Lines F.10(Menoufy × Suvin),1 line F.10(Giza 87×Pima S6), Menoufy, Suvin,Pima S6,Giza 86, Giza 94 and two varieties extra-long staple,i.e. Giza 92, and Giza 96 at three different locations in the lower Egypt i.e. Kafr El-Sheikh,Damietta and Sharkia, during the two growing seasons 2016 and 2017. The experimental design was a randomized complete block design with three replications. Seed cotton yield character showed significant mean squares for environments, genotypes and genotypes x environments interaction. The genotypes Giza 86, Pima S6 and line No.5 recorded average stable while two varieties Giza 86 and Pima S6 were general adaptability across a wide range of environment. Genotypes from divergent clusters divided to 5 di-vergent groups can be used for hybridization in order to isolate useful recombinants in the segregating generations. Therefore, may be recommended to be released as stable high yielding and/or be incorpo-rated as breeding stock in any future breeding pro-gram aiming for producing stable high.
展开▼
