OFF-TYPE COTTON PLANTS OF GIZA 86 AND GIZA 88 COTTON CULTIVARS AND THEIR EFFECT ON CULTIVAR DETERIORATION IN THE COMMERCIAL SCALE.
Abstract: During the last decade Egyptian cotton cultivars faced some local and global variables and challenges that have influenced their qualities such as lint percentage and fiber quality properties . Two varieties (Giza 86 and Giza 88) and their off-types were collected from commercial cotton area. The original maintained varieties and their off-types were grown and selfed during 2012, 2013 and 2014 growing seasons. All genotypes were evaluated in randomized complete block design with three replications in season 2014. Significant differences were observed between Giza 86 and its off-types for lint percentage, seed index, lint index, fiber length and fiber strength. On the other hand, the recorded differences were significant for all traits except for micronaier reading in Giza 88. Also, the original varieties (Giza 86 and Giza 88) surpassed all off-types for lint percentage and all fiber properties. Multivariate technique using canonical discriminate analysis revealed that the two and four functions accented for about 100% for cumulative variance. While in Giza 86, the fiber length followed by lint percentage and lint index characters showed the highest discrimination among genotypes in the first function, lint percentage followed by fiber length trait were the primary source in the second function . On the other side, the variance explained by the first, second and third canonical function were 56.2%, 30.2% and 8.4 respectively , seed index character had the highest loading in the first function followed by the traits lint percentage and fiber strength. Generally, the breeder can easily get valuable information from characterization of such off-types which are inferior in lint percentage and lint index as well as lint quality properties.
Publication year 2015
Pages 1292-1304
Organization Name
Author(s) from ARC
Publication Type Journal
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