Document Type : Original Article
Authors
1
Fiber Research Department, Cotton Research Institute, Agriculture Research Center, Giza, Egypt
2
Chemistry of Cotton and Textile Fibers department, Cotton Research Institute, Agriculture Research Center, Giza, Egypt
Abstract
This investigation was carried out during the 2023 season of three Egyptian cotton varieties (Giza 95, Super Giza 94 long staple, Giza 96 extra-long staple With 3 cotton grades (Fully Good , Good , and (FGF), and two varieties of upland cotton: Edessa and Lima) to find out the relationship between the degree of polymerization (DP) and the fiber properties of different cultivars. The obvious results of this investigation can be summarized as follows: The differences between the studied cotton genotypes in all fiber and chemical properties were significant, except K/S. Giza 96 recorded the highest upper half mean length (mm), fiber uniformity index, fiber bundle strength (g/tex), reflectance degree (Rd %) and degree of polymerization (DP), while it gave the lowest fiber elongation. The Edessa variety gave the lowest values for most traits, such as fiber length, uniformity index, fiber maturity, fiber strength, and degree of polymerization, but it gave the maximum values of short fiber index and trash count. Also, Giza 97 recorded maximum fiber maturity. Lint grade FG gave the highest values of fiber length, uniformity, micronaire value strength, and DP, but it gave the lowest values of short fiber index, yellowness degree, trash area, and trash count. On the other hand, lint grade FGF gave the lowest values of most traits under study. Cotton variety Giza 96 × lint grade FG recorded the best fiber uniformity and degree of polymerization. The correlation between DP and both fiber strength and fiber elongation was positive and highly significant.
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