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Registration of GaT 85‐19 Cotton Germplasm Line
Author(s) -
Baker Shelby H.
Publication year - 1992
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1992.0011183x003200020058x
Subject(s) - germplasm , citation , tifton , crop , line (geometry) , gossypium hirsutum , fiber crop , library science , horticulture , biology , mathematics , botany , computer science , agronomy , geometry , dry matter
GaT 85-19, a germplasm line of cotton (Gossypium hirsutum L.) (Reg. no. GP-504, PI 552535), was released by the University of Georgia Coastal Plain Experiment Station in 1990. It is a reselection of Gat 77-27, which was derived from a cross of PD 4381B x CP 8208. PD 4381B is a breeding line developed by D. C. Harrell and T. W. Gulp and was released by the Pee Dee Experiment Station, Florence, SC. CP 8208 is a selection from the 'Atlas' breeding material developed by J. G. Jenkins at the Georgia Coastal Plain Experiment Station. GaT 85-19 is a vigorous intermediate type with darkgreen foliage, medium-size leaves, bolls and seed. Plant height, maturity and canopy density are similar to 'Coker 315'. Lint yields have been erratic but in certain environments have been excellent. In Georgia trials, 3-yr average lint yield was 90% of 'Deltapine 90' and 97% of Coker 315. This strain has an excellent combination of fiber properties. Of particular interest is its consistently low micronaire value when grown in Georgia and other southeastern locations. Over 3 yr (seven tests), GaT 85-19 had significantly lower micronaire (4.2) than Deltapine 90 (4.8) and Coker 315 (4.6). Fiber length is equal to Coker 315 (30.3 mm vs. 30 mm) and significantly longer than Deltapine 90 (30.3 mm vs. 28.7 mm). Fiber strength is 210, 207, and 198 kN m kgfor Deltapine 90, GaT 85-19, and Coker 315, respectively. Yarn tenacity is 127 and 113 kN m kgfor GaT 85-19 and Deltapine 90, respectively. Data from the Regional Wilt Test at Tallassee, AL, indicated that this line has moderate resistance to the fusarium wilt root-knot nematode complex, caused by Fusarium oxysporum Shlechtend.:Fr. f. vasinfectum (Atk.) W.C. Snyd. & H.N. Hans. and Meloidogyne incognita (Kofoid & White) Chitwood. Having low micronaire reading and excellent fiber strength, length, and length uniformity, GaT 85-19 should serve as an excellent breeding source for developing cottons with high fiber quality. Small lots of seed may be obtained from Shelby H. Baker, Agronomy Department, Coastal Plain Experiment Station, P.O. Box 748, Tifton, GA 31793.