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Published in Crop Sci 16:578-580 (1976)
© 1976 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Relationship of Yield, Seed Quality, and Fiber Properties in Upland Cotton1

John H. Turner, Harmon H. Ramey, Jr. and Smith Worley, Jr.2

Seed and fiber samples of four Upland cotton (Cossypium hirsutum L.) cultivars, grown at 17 locations in the 1973 Regional Cotton Variety Test, were examined for yield, seed quality, and fiber quality. Correlation coefficients were calculated among eight agronomic and quality parameters.

No significant correlations were found between yield and oil content or yield and protein content. Three of the cultivars showed positive correlations between oil content and fiber maturity and negative correlations between oil content and percent immature seed. The strongest correlation for protein was a negative relationship with fiber maturity. ‘Lockett 4789A’ gave a high positive correlation between oil content and seed index. ‘Acala 1517–70’ showed a strong negative relationship between protein and fiber maturity. Both of these cultivars showed positive correlations between yield and fiber strength.

The feasibility of using Micronaire readings (fiber maturity) as indicators of oil content for cottonseed in the various production zones are discussed.

Key Words: Production zones • Immature seeds • Oil content • Protein content • Fiber strength • Fiber maturity • Mean length • Gossypium hirsutum L.

1 Contribution from the USDA, ARS, Cotton Quality Laboratories, Univ. of Tennessee, Knoxville.

2 Research agronomist, research geneticist, and research agronomist, respectively, ARS, USDA, Cotton Quality Laboratories, Univ. of Tennessee, Knoxville, TN 37916.

Received for publication January 31, 1976.




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