|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 93009, PD 93019, and PD 93021 have yield stability in full-season and late-planted trials, and 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 PD 93009, PD 93019, and PD 93021 that combine yield stability in full-season and late-planted production systems and excellent fiber properties were released in 1995. These germplasm lines derive from random single-plant selections in the F2 generation from a study of the inheritance of fiber properties in populations formed from crosses among Pee Dee germplasm lines. The parentage of PD 93009 is PD 5286/PD 5485. PD 5286 is from the cross of 'DES 422'/PD 6044 while PD 5485 is from the cross 'McNair 235'/FJA 347. The parentage of PD 93019 is PD 5285/PD 5377. PD 5285 has the same pedigree as PD 5286 while PD 5377 is from the cross 'Delcot 311'/PD 6171. The parentage of PD 93021 is PD 5286/PD 5377. Compared with 'PD-3', PD 93009 averaged 12% higher yield, PD 93019 averaged 8% higher yield, and PD 93021 averaged 5% higher yield over full-season and late-planted trials. PD-3 is a southeastern U.S. cultivar that combines high yield potential with excellent fiber and spinning properties. Compared with PD-3, 2.5% fiber span length, fiber strength (stelometer), and micronaire reading are similar. The yarn strengths of PD 93009 and PD 93019 are similar to PD-3 while that of PD 93021 averages 3% higher. These three germplasm lines should be useful to other cotton breeders due to their combination of yield stability in full-season and late-planted trials and good fiber quality.