|Gilbert, Robert -|
|Tai, Peter -|
|Miller, Jimmy -|
|Dunckelman, John -|
|Davidson, Joe -|
Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: April 1, 2006
Publication Date: July 1, 2006
Citation: Edme, S.J., Gilbert, R., Comstock, J.C., Glaz, B.S., Tai, P., Miller, J.D., Dunckelman, J., Davidson, J. 2006. Registration of 'CP 98-1029' Sugarcane l. Crop Science. 46:1821-1822. Interpretive Summary: Sugarcane is grown on organic 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 that yield well on both soil types are needed, but only rarely are such cultivars identified. Experimental data of CP 98-1029 suggest that it may be one of these unique cultivars. On organic soils, the cane yield of CP 98-1029 was 18.1% higher than that of the commercial reference cultivar, CP 72-2086. Its sugar content was 0.7% lower than that of CP 72-2086. Its high cane and acceptable sugar content resulted in a sugar per hectare yield and an economic index on organic soils that were 17.3% and 18.8% higher, respectively, for CP 98-1029 than for CP 72-2086. On sand soils, the cane yield and sugar content of CP 98-1029 were 7.1 higher and 4.4% lower, respectively, than those of CP 72-2086. The high cane and acceptable sugar content resulted in a sugar per hectare yield and an economic index on sand soils that were, respectively, 2.4% higher and 1.5% lower for CP 98-1029 than for CP 72-2086. Cultivar resistance and tolerance are the major sources of sugarcane disease control, but they are challenging to identify and quantify, because plants are growing and therefore exposed to disease pressures all year. CP 98-1029 has shown adequate resistance for commercial production in Florida to eye spot, smut, leaf scald, and sugarcane mosaic virus, and moderate resistance to rust and ratoon stunting disease. CP 98-1029 is susceptible to sugarcane yellow leaf virus, but its high yields in experimental plots were obtained regardless of this susceptibility. The commercial release of CP 98-1029 makes available to Florida growers a cultivar that maintains high yields in the presence of diseases, and therefore should help to continue providing the U.S. an affordable and stable sugar supply. Additionally, CP 98-1029 may be tested by farmers in Central America, who grow mostly Canal Point (CP) cultivars. CP 98-1029 was developed through cooperative research by the USDA-ARS, the University of Florida-Institute of Food and Agricultural Sciences, and the Florida Sugar Cane League, Inc., and was released in the autumn of 2005.
Technical Abstract: Sugarcane grown in a concentrated region near Lake Okeechobee in Florida produces 25% of the sugar produced in the U.S. The development of a constant supply of new sugarcane cultivars helps growers to respond to economic, pathological, and ecological pressures. The purpose of this research was to test yields, cold tolerance, and disease resistance of 14 new sugarcane genotypes in the plant-cane, first-ratoon, and second-ratoon crops in commercial fields at nine commercial sugarcane sites in Florida. CP 98-1029, an outstanding genotype in these tests, was selected among the progeny of a cross between CP 91-1980 (female parent) and CP 94-1952 (male parent). The female parent was advanced to the final testing stage of the Canal Point cultivar development program but not released due to mediocre yields. The male parent was not advanced beyond an early selection stage. CP 98-1029 was developed through cooperative research conducted by the USDA-ARS, the University of Florida-Institute of Food and Agricultural Sciences, and the Florida Sugar Cane League, Inc., and was released in the autumn of 2005. The mean stalk weights of CP 98-1029 and CP 72-2086, the commercial reference cultivar, were 1.41 and 1.51 kg, respectively. Yields of theoretical recoverable sugar and of cane for CP 98-1029 were 118.4 g sugar per kg cane and 133.9 tons cane per ha, respectively, compared with 119.8 g per kg and 114.6 tons per ha for CP 72-2086. This resulted in mean yields of 15.85 and 13.72 tons of sugar per ha for CP 98-1029 and CP 72-2086, respectively. CP 98-1029 is moderately susceptible to rust and ratoon stunting disease and is susceptible to sugarcane yellow leaf virus. Otherwise, CP 98-1029 has shown adequate resistance to all other major diseases in Florida. Based on tests conducted in Gainesville, FL, cold tolerance of CP 98-1029 is excellent. Based on its high sugar and tonnage yields in the presence of diseases prevalent in Florida, CP 98-1029 may make a substantial commercial contribution to sugarcane production in Florida.