|HARDEV, SANDHU - University Of Florida|
|GLAZ, BARRY - Retired ARS Employee|
|DAVIDSON, R - Florida Sugarcane League|
|GILBERT, ROBERT - University Of Florida|
|MILLIGAN, SCOTT - Monsanto Corporation|
|HU, CHEN-JIAN - Us Sugar Corporation|
|GLYNN, NEIL - Syngenta Seeds, Inc|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/19/2014
Publication Date: 5/2/2014
Citation: Hardev, S., Glaz, B.S., Edme, S.J., Davidson, R.W., Zhao, D., Comstock, J.C., Gilbert, R., Milligan, S., Hu, C., Glynn, N.C., Sood, S.G., Mccorkle, K.M. 2014. Registration of ‘CPCL 02-6848’ Sugarcane. Journal of Plant Registrations. 8:155-161.
Interpretive Summary: Sugarcane in south Florida is an important crop and contributes about 25% of U.S. domestic sugar production. Approximately 80% of sugarcane grows on organic (muck) soils and 20% grows on sand soils in the region. New sugarcane cultivars are needed that yield well on muck and/or sand soils and have acceptable resistance to major diseases. Field data from three crops (plant cane and first- and second-ratoon crops) at multiple locations suggest CPCL 02-6848 yielded well in commercial sugarcane fields on both muck and sand soils. On muck soils at seven locations, CPCL 02-6848 had 44.8 and 22.5% higher cane yields than CP 72-2086 and CP 89-2143 (two check cultivars for muck soils) and 39.7 and 17.8% higher sucrose yields, respectively. The three-year mean value of sugar content (commercial recoverable sucrose) of CPCL 02-6848 was 2.0 and 3.1% lower, respectively, than those of CP 72-2086 and CP 89-2143 on muck soils. The economic index of CPCL 02-6848 was significantly (38.1 and 14.8%) higher than those of CP 72-2086 and CP 89-2143 on muck soils. CPCL 02-6848 did not statistically differ from CP 78-1628 (a check cultivar on sand soils) in most yield components on sand soils, although its cane and sucrose yield numerically higher than those of the check cultivar. CPCL 02-6848 showed adequate resistance or tolerance to smut, leaf scald, brown rust, sugarcane mosaic virus, and ratoon stunting for commercial production, but is susceptible to orange rust and sugarcane yellow leaf virus in Florida. The commercial release of CPCL 02-6848 makes available to Florida growers a cultivar that maintains high yields on muck and sand soils.
Technical Abstract: Development of 'CPCL 02-6848' (Reg. No. 667596; PI), sugarcane (a complex hybrid of Saccharum spp.) was initiated by the United States Sugar Corporation (USSC) and completed by collaborative research of the USDA-ARS, the University of Florida, and the Florida Sugar Cane League, Inc. The female parent of CPCL 02-6848 is CL 92-2533. The male parent is not known because the flower of CL 92-2533 was exposed to the pollen of several male flowers (polycross). CL 41-223 is the only cultivar in the pedigree of CPCL 02-6848, which was cultivated on a large acreage (87% of total acreage in 1962) in Florida. The major attributes of CPCL 02-6848 include its high yields of cane tonnage in the plant-cane through the second-ratoon crops on both muck and sand soils, its resistance to smut (caused by Ustilago scitaminea H. & P. Sydow), brown rust (caused by Puccinia melanocephala H. & P. Sydow), and Sugarcane mosaic virus strain E (SCMV), and moderate resistance to leaf scald (caused by Xanthomonas albineans Ashby, Dowson) and ratoon stunting disease (caused by Leifsonia xyli subsp. xyli Evtsuhenko et al.) in Florida. CPCL 02-6848 was released on 16 Oct. 2012 and it is expected to be cultivated on both muck and sand soils in Florida.