How Genotype and Temperature Modify Yarn Properties and Dye Uptake
Mar 28, 2019


Genotype and weather are important factors in determining both cotton fiber quality and yield. Examinations of the effects of genotype on those fiber properties most important to textile manufacturers have led to development of cotton genotypes with potential for producing high yields of fiber with improved spinning properties. However, significant genotype-temperature interactions complicate maximization of yields of fiber with the properties demanded for modern textile processing. Temperature [cumulative heat units above 15.6C] during the growing season alters micronaire and the fiber maturity properties most closely linked to spinning and dye-uptake success. When four Upland cotton genotypes were grown in South Carolina, AFIS fiber-quality assessment showed that genotype was a powerful determinant of fiber length, short fiber content, diameter, circularity, immature fiber fraction, area, fine fiber fraction, micronAFIS, and perimeter. Temperature also modified all AFIS fiber properties, and genotype interacted with temperature to modify fiber length, short fiber content, circularity, immature fiber fraction, and micronaire. Tests of yarns spun from fibers of the four genotypes showed genotype to be a significant factor in yarn nep count, strength, elongation, and tenacity. Temperature was also a factor in yarn nep count, evenness, strength, elongation, and tenacity. Genotype and temperature were significant factors in dye-uptake. Regression analyses of temperature-modified fiber properties vs. yarn testing and dye-uptake data described and predicted spinning and dyeing success.

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