EVALUATION OF SOME COTTON LINES UNDER DIFFERENT ENVIRONMENTAL CONDITIONS
Abstract: Environmental conditions vary or likely ‎to vary from one location to another and / or from year to year in this extended area, ‎the evaluation process of the commercial varieties as well as the newly released or ‎promising lines over different environments is a great ‎important to the cotton breeder. Therefore, the present study was carried out to evaluate thirty five lines with seven check cotton genotypes under two growing seasons (2013 and 2014) in two locations for earliness, yield ,yield components and fiber length characters. The results showed that, there are significant differences for genotypes, environment and their interaction for all characters except for cotton yield for environment. The correlation coefficient was significant between seed cotton yield and each of first fruiting node, lint yield, boll weight, and lint index, while it was non significant positive with both lint percentage and earliness percentage but, it was non significant negative for fiber length. Principal component analysis showed that the characters having relatively high value in the first principal component (PC1) were seed cotton yield, lint yield and lint index while, second principal component (PC2) was principally affected by boll weight, seed index, lint percentage. In the same time, cluster analysis could efficiently describe the characteristics of group of genotypes in different groups. The obtained results indicate the presence of genetic diversity among the tested cotton genotypes. Genotypes from divergent clusters can be used for hybridization in order to isolate useful recombinants in the segregating generations. This information might be used in the genetic and breeding programs for improvement of Egyptian cotton. In addition to continuous in evaluation of these lines especially in the rest fiber characters and cotton yield is recommended. Three lines No. 3, 4 and 7 were significantly out yield and fiber length compared with the commercial variety Giza 86. Also, two lines No. 11 and 31 gave high yield and similar halo length compared with Giza 87.
Publication year 2013
Pages 804 – 818
Organization Name
Project
Author(s) from ARC
Publication Type Journal
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