|DAVIDSON, R WAYNE - FLORIDA SUGARCANE LEAGUE|
|SANDHU, HARDEV - UNIVERSITY OF FLORIDA|
|GILBERT, ROBERT - UNIVERSITY OF FLORIDA|
|GLYNN, NEIL - SYNGENTA SEEDS, INC.|
|MILLIGAN, SCOTT - MONSANTO CORPORATION|
|HU, CHEN-JIAN - U.S. SUGAR CORPORATION|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/24/2013
Publication Date: 7/8/2013
Citation: Davidson, R.W., Zhao, D., Comstock, J.C., Sandhu, H.S., Glaz, B.S., Edme, S.J., Sood, S.G., Gilbert, R.A., Glynn, N.C., Milligan, S.B., Hu, C.J. 2013. Registration of ‘CPCL 05-1791’ Sugarcane. Journal of Plant Registrations. 7:doi:10.3198/jpr2013.02.0007crc.
Interpretive Summary: Sugarcane is grown on organic (muck) and sand soils in a region near Lake Okeechobee in south Florida. This region contributes about 25% of U.S. domestic sugar production. New cultivars are needed that yield well on both soil types and have acceptable profiles of disease resistance, but only rarely are such cultivars identified. New cultivars that produce well on the sand soils are particularly needed to help sustain profits on these soils. Experimental data of CPCL 05-1791 suggest that it will yield well in commercial sugarcane fields on sand soils. On sand soils at three locations, the three-crop mean cane yield of CPCL 05-1791 was 19% higher than that of CP 78-1628, the reference cultivar against which yields of CPCL 05-1791 were compared. The three-year mean value of sucrose content on sand soils of CPCL 05-1791 was 3% higher than that of CP 78-1628. Its high cane yield and sucrose content resulted in a sucrose per hectare yield and an economic index on sand soils that were 22 and 29%, respectively, higher for CPCL 05-1791 than for CP 78-1628. Cultivar resistance and tolerance are the major sources of sugarcane disease control in Florida, but they are challenging to identify and quantify, because plants are growing and therefore exposed to disease pressures all year. CPCL 05-1791 has shown adequate resistance for commercial production in Florida to eye spot, smut, orange rust, sugarcane mosaic virus, leaf scald, and ratoon stunting. CPCL 05-1791 is moderately susceptible to brown rust and as are almost all sugarcane cultivars in Florida, to sugarcane yellow leaf virus. Through marker assisted selection, it was determined that CPCL 05-1791 does not have a gene that confers resistance to brown rust. The commercial release of CPCL 05-1791 makes available to Florida growers a cultivar that maintains high yields on sand soils in the presence of most major sugarcane diseases prevalent in Florida. It is expected that CPCL 05-1791 will help to sustain sugarcane production on sand soils in Florida and help to continue providing the U.S. an affordable and stable sugar supply. Additionally, CPCL 05-1791 may be tested by farmers in Central America, who grow mostly Canal Point (CP) cultivars. CPCL 05-1791 was released on October 16, 2012.
Technical Abstract: Development of ‘CPCL 05-1791’ (Reg. No. ; PI ) sugarcane (a complex hybrid of Saccharum spp.) is the latest in a series of commercial sugarcane cultivar releases originating from the United States Sugar Corporation (USSC) and completed by the cooperative Canal Point sugarcane breeding and selection program (CP program) which includes the USDA-ARS, the University of Florida, and the Florida Sugar Cane League, Inc. CPCL 05-1791, which was released in Florida on 20 Sept. 2012, was selected from a cross of CP 96-1252 x CL 90-4725 made at Clewiston, FL on 5 Dec. 2002. The male parent, CL 90-4725, is a proprietary cultivar of USSC. CPCL 05-1791 was released because of its high cane yield, moderate levels of commercial recoverable sucrose (CRS) on mineral (sand) soils, and its resistance to smut (caused by Ustilago scitaminea H. & P. Sydow), Sugarcane mosaic virus strain E (mosaic), orange rust (caused by Puccinia kuehnii E.J. Butler), and its moderate resistance to brown rust (caused by Puccinia melanocephala H. & P. Sydow) and leaf scald (caused by Xanthomonas albilineans Ashby, Dowson). All of these diseases are of economic importance to sugarcane production in Florida.