Narrative
The Agricultural Research Service, United States Department of Agriculture and Cotton Incorporated announce the joint release of seven Upland cotton germplasm lines, PSLC-U01, PSLC-U02, PSLC-U03, PSLC-U04, PSLC-U05, PSLC-U06, and PSLC-U07 that possess competitive lint yield, superior fiber strength, length, and uniformity when grown on the High Plains of Texas. The PSLC germplasm lines originated from the cross of two commercial cultivars, ‘Phytogen 72’ [PHY 72 (female)] and ‘Stoneville 474’ [STV 474 (male)]. The PSLC_U01-U07 lines were originally selected from a total of 137 F7 recombinant inbred lines; each derived from a single seed decent (F1 to F7). Since the initial selection from the replicated trials at USDA-ARS, Plant Stress and Germplasm Development Research Unit, Lubbock, Texas, the PSLC-U01-U07 lines showed excellent fiber quality properties. In 2014, fiber strength ranged with averages from 311.3 to 351.7 kN m kg-1 and in 2016 from 299.8 to 345.0 kN m kg-1 for the PSLC lines. While in 2014, the two parents (PHY 72= 327.8 and STV 474 = 285.2 kN m kg-1) and the four check cultivars (‘DeltaPine 1212’, ‘FiberMax 2011’, ‘Phytogen 375’, and ‘Stoneville 5458’) ranged from 272.9 to 306.3 kN m kg-1, and in 2016, the two parent (PHY 72= 320.8 and STV 474 = 285.2 kN m kg-1) and the four check cultivars ranged 270.5 to 307.8 kN m kg-1. In 2014, fiber length ranged with averages from 28.87 to 31.83 mm and in 2016 from 28.51 to 31.88 mm for the PSLC lines. While in 2014, the two parents and the four check cultivars ranged from 27.08 to 29.46 mm, and in 2016, the two parent and the four check cultivars ranged 27.31 to 29.53 mm. The replicated trials also revealed that fiber uniformity increasing at least 1 % in the PSLC germplasm lines, and the lines kept micronaire which is an estimated of fiber maturity and fineness within acceptable thresh holds.