|GILBERT, ROBERT - University Of Florida|
|DEL BLANCO, ISABEL - Former ARS Employee|
|DAVIDSON, R WAYNE - Florida Sugarcane League|
|MILLER, JIMMY - Retired ARS Employee|
|TAI, PETER Y - Retired ARS Employee|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/1/2011
Publication Date: 9/15/2011
Citation: Gilbert, R.A., Comstock, J.C., Glaz, B.S., Del Blanco, I.A., Edme, S.J., Davidson, R., Glynn, N.C., Sood, S.G., Zhao, D., Miller, J.D., Tai, P.P. 2011. Registration of ‘CP 03-1912’ Sugarcane. Journal of Plant Registrations. 5(3)318-324.
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 CP 03-1912 suggest that it will yield well in commercial sugarcane fields on sand soils. On sand soils at two locations, the three-crop mean cane yield of CP 03-1912 was 39% higher than that of CP 78-1628, the reference cultivar against which yields of CP 03-1912 were compared. The three-year mean values of sugar content on sand soils of CP 03-1912 and CP 78-1628 were usually similar. Its high cane yield and acceptable sugar content resulted in a sugar per hectare yield and an economic index on muck soils that were 37 and 44%, respectively, higher for CP 03-1912 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. CP 03-1912 has shown adequate resistance for commercial production in Florida to eye spot, smut, leaf scald, brown rust, orange rust, sugarcane mosaic virus, and ratoon stunting. CP 03-1912 is susceptible to sugarcane yellow leaf virus as are almost all sugarcane cultivars in Florida. The commercial release of CP 03-1912 makes available to Florida growers a cultivar that maintains high yields on sand soils in the presence of diseases. It is expected that CP 03-1912 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, CP 03-1912 may be tested by farmers in Central America, who grow mostly Canal Point (CP) cultivars. CP 03-1912 is expected to be released in April 2011.
Technical Abstract: ‘CP 03-1912’ (Reg. No. ; PI ) sugarcane (a complex hybrid of Saccharum spp.) was developed through cooperative research conducted by the USDA-ARS, the University of Florida, and the Florida Sugar Cane League, Inc., and was released to growers in Florida in April 2011. CP 03-1912 was selected from a cross of genotypes CP 92-1167 X CP 95-1039 made at Canal Point, FL in December 2000. Both parents were advanced to the final selection stage (Stage 4) of the Canal Point sugarcane cultivar breeding and selection program (CP program), but not considered for commercial release. CP 03-1912 was tested in Stage 4 only on sand soils in Florida and was released for these soils because of its high cane yield and acceptable commercial recoverable sucrose (CRS), its resistance to brown rust (caused by Puccinia melanocephala H. & P. Sydow), orange rust (caused by Puccinia kuehnii E.J. Butler), and Sugarcane mosaic virus strain E (mosaic); and its moderate resistance to leaf scald (caused by Xanthomonas albilineans Ashby, Dowson), smut (caused by Ustilago scitaminea H. & P. Sydow), and ratoon stunt (caused by Leifsonia xyli subsp. xyli Evtsuhenko et al.) in Florida.