|Davidson, Rolin - FLORIDA SUGARCANE LEAGUE|
|Gilbert, Robert - UNIVERSITY OF FLORIDA|
|Del Blanco, Isabel|
|Tai, Peter - RETIRED ARS SCIENTIST|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: March 10, 2009
Publication Date: May 26, 2009
Repository URL: http://parking.nal.usda.gov/shortterm/21347_Registration_of_CP_01-1372.pdf
Citation: Edme, S.J., Davidson, R.W., Gilbert, R.A., Comstock, J.C., Glynn, N.C., Glaz, B.S., Del Blanco, I.A., Miller, J.D., Tai, P.Y.P. Registration of ‘CP 01-1372’ Sugarcane. Journal of Plant Registrations. 3:150-157. 2009. 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. Experimental data of CP 01-1372 suggest that it is one of these rare cultivars. On muck soils, the three-crop mean cane yield of CP 01-1372 was higher than that of CP 72-2086 and CP 89-2143. CP 72-2086 and CP 89-2143 were the reference cultivars against which yields of CP 01-1372 were compared. The three-year mean values of sugar content on muck soils of the two reference cultivars and CP 01-1372 were 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 both higher for CP 01-1372 than for CP 72-2086 and CP 89-2143. On sand soils, the sugar content of CP 01-1372 was higher than that of CP 78-1628, the reference cultivar for sand soils; CP 01-1372 and CP 78-1628 had similar cane yields. However, the yield of sugar per hectare and the economic index of CP 01-1372 were higher than those of CP 78-1628 on sand soils. 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 01-1372 has shown adequate resistance for commercial production in Florida to eye spot, leaf scald, brown rust, sugarcane mosaic virus, and ratoon stunting. CP 01-1372 is susceptible to sugarcane yellow leaf virus as are almost all sugarcane cultivars in Florida. Orange rust infected commercial fields in Florida about one year before the release of CP 01-1372, but there were no infections of orange rust identified on CP 01-1372. CP 01-1372 is moderately susceptible to smut and it is hoped that this susceptibility will not be too high for commercial production in Florida. The commercial release of CP 01-1372 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 01-1372 may be tested by farmers in Central America, who grow mostly Canal Point (CP) cultivars. CP 01-1372 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 December 2008.
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 purposes of this research were to test yields, cold tolerance, and disease resistance of 13 new sugarcane genotypes in the plant-cane, first-ratoon, and second-ratoon crops in commercial fields at ten commercial sugarcane sites in Florida. CP 01-1372, an outstanding genotype in these tests, was selected among the progeny of a cross between genotype CP 94-1200 X cultivar CP 89-2143. CP 89-2143 has been the most widely grown sugarcane cultivar in Florida since 2006. CP 01-1372 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 December 2008. In experiments on organic (muck) soils, yields of CP 01-1372 were compared with yields of cultivars CP 72-2086 and CP 89-2143. On sand soils, CP 01-1372 yields were compared with those of cultivar CP 78-1628. The mean stalk weights of CP 01-1372, CP 72-2086, and CP 89-2143, were 1.3, 1.6, and 1.4 kg, respectively on muck soils; and the stalk weights of CP 01-1372 and CP 78-1628 were 1.0 and 1.2 kg, respectively, on sand soils. Yields of commercially recoverable sucrose (CRS) on muck soils for CP 01-1372, CP 72-2086, and CP 89-2143 were 117.1, 116.7, and 117.3 g sucrose per kg cane, respectively. Cane yields on muck soils for CP 01-1372, CP 72-2086, and CP 89-2143 were 182.2, 116.9, and 135.8 tons per ha, respectively; and sucrose yields on muck soils were 21.18, 13.71, and 15.87 kg per ha, respectively. On sand soils, CRS yields for CP 01-1372 and CP 78-1628 were 131.6 and 120.1 g per kg, respectively. Cane yields on sand soils for CP 01-1372 and CP 78-1628 were 130.1 and 111.5 tons per ha, respectively; and sucrose yields on sand soils were 17.23 and 13.63 tons per ha, respectively. CP 01-1372 has shown adequate resistance to all other major diseases in Florida except sugarcane yellow leaf virus and smut. Based on tests conducted in<p>Gainesville, FL, cold tolerance of CP 01-1372 is similar to that of CP 89-2143, one of the most cold-tolerant sugarcane cultivars in Florida. Based on its high sugar and tonnage yields in the presence of diseases prevalent in Florida, CP 01-1372 may make a substantial commercial contribution to sugarcane production on muck and sand soils in Florida.