|May Iii, Oscar|
Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/18/1996
Publication Date: N/A
Interpretive Summary: Cotton germplasm with improved fiber properties is needed by the textile industry and can be used by other cotton breeding programs as a means to improve fiber quality in their breeding material. Public breeding programs that develop germplasm freely distribute seed of the germplasm lines to other breeders and geneticists and have a positive effect on cotton breeding efforts. Modernization of yarn spinning technologies in the textile industry is demanding higher strength cotton. The germplasm lines PD 93007, PD 93043, and PD 93046 have early maturity, good fiber quality without a decrease in lint yield. These germplasm lines should be useful to other cotton breeders and geneticists as a source of improved fiber properties in a high-yielding genetic background.
Technical Abstract: Three germplasm lines of upland cotton that combine early maturity, high yield potential, and excellent fiber properties were released. PD 93007, PD 93043, and PD 93046 derive from random single-plant selections in the F2 generation from a study of the inheritance of fiber properties in crosses among Pee Dee germplasm lines. Parentage of PD 93007 is PD 5285/PD 5485. PD 5285 is from the cross 'DES 422'/PD 6044, while PD 5485 is from the cross 'McNair 235'/FJA 347. The parentage of PD 93043 is PD 5265/PD 5576. PD 5265 is from the cross 'McNair 220'/'Sealand 542', and PD 5576 is from the cross 'Deltapine 41'/PD 3246. The parentage of PD 93046 is PD 5358/PD 5485. PD 5358 is from the cross 'Delcot 311'/PD 6079. PD 93007 averaged 20% higher yield than 'PD-3', while PD 93043 and PD 93046 averaged 27% and 21%, respectively, higher yield than PD-3. PD-3 is a southeastern U.S. cultivar with an unusual combination of high yield potential and good fiber rand spinning properties. Compared with PD-3, PD 93007, PD 93043, and PD 93046 exhibit only minor differences in 2.5% fiber span length, fiber strength (stelometer), and micronaire reading. PD 93007 has slightly lower yarn strength (<2%) than PD-3, while that of PD 93043 is similar to PD-3 and that of PD 93046 is about 2% higher than PD-3. These germplasm lines should be useful to breeders as sources of high yield potential, early maturity, and good fiber quality.