ARS | Publication request: Registration of ‘CP 00-1446’ Sugarcane

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 3, 2008
Publication Date: January 15, 2009
Repository URL: http://hdl.handle.net/10113/31456
Citation: Comstock, J.C., Glaz, B.S., Edme, S.J., Davidson, W.R., Gilbert, R.A., Glynn, N.C., Miller, J.D., Tai, P.Y.P. Registration of ‘CP 00-1446’ Sugarcane. Journal of Plant Registrations. 3:28-34. 2009.

Interpretive Summary: 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 are needed that yield well on both soil types and have acceptable profiles of disease resistance. Experimental data of CP 00-1446 suggest that it will yield well on sand soils where sugarcane is grown in Florida. On sand soils, the sugar content of CP 00-1446 was similar to that of CP 78-1628, the reference cultivar for sand soils. CP 00-1446 had higher per hectare yields of cane and sucrose than CP 78-1628 and the mean economic index of CP 00-1446 for the three crop cycle was higher than that of CP 78-1628 on sand soils. On organic soils, the three-crop mean yields of cane and sucrose of CP 00-1446 were higher than those of CP 72-2086 and similar to those of CP 89-2143. CP 72-2086 and CP 89-2143 were the reference cultivars against which yields of CP 00-1446 were compared on organic soils. The three-year mean sugar content on organic soils of CP 00-1446 was lower than the sugar contents of CP 72-2086 and CP 89-2143. CP 00-1446 is not recommended for muck soils due to its low sugar content on these 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 00-1446 has shown adequate resistance for commercial production in Florida to eye spot, smut, leaf scald, brown rust, orange rust, and ratoon stunting. CP 00-1446 is susceptible to sugarcane yellow leaf virus, but its high yields in experimental plots were obtained regardless of this susceptibility. Another reason that CP 00-1446 is not recommended for muck soils is that in some regions on those soils, it is too susceptible to sugarcane mosaic virus for commercial production in Florida. Sugarcane mosaic virus has not been a problem on most sand soils where sugarcane is grown in Florida. The commercial release of CP 00-1446 made available to Florida growers a cultivar that maintains high yields on sand soils in the presence of diseases, and therefore should help to continue providing the U.S. an affordable and stable sugar supply. Additionally, CP 00-1446 may be tested by farmers in Central America, who grow mostly Canal Point (CP) cultivars. CP 00-1446 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 2007.

Technical Abstract: Technical Abstract: ‘CP 00-1446’ (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 September 2007. CP 00-1446 was selected from a cross of genotypes CP 93-1607 X CP 91-1150 made at Canal Point, FL in January 1998. The female parent, CP 93-1607, was advanced to the penultimate selection stage (Stage 3) of the Canal Point sugarcane cultivar breeding and selection program (CP program). The male parent, CP 91-1150, was advanced to the final testing stage (Stage 4) of the CP program, and temporarily considered for release after having high yields in the plant-cane crop on sand soils, but not released due to low ratoon-crop yields on sand soils. CP 00-1446 was released and recommended for sand soils in Florida because of its high plant cane and acceptable ratoon per hectare yields of cane and sucrose and commercial recoverable sucrose (CRS) on sand soils, and its acceptable disease reactions to smut (caused by Ustilago scitaminea (Sydow & P. Sydow) (moderately susceptible), brown rust (caused by Puccinia melanocephala H. & P. Sydow) (moderately resistant), orange rust (caused by Puccinia kuehnii E.J. Butler) (moderately resistant), leaf scald [caused by Xanthomonas albilineans Ashby, Dowson] (resistant), Sugarcane mosaic virus strain E (mosaic) (moderately susceptible), and ratoon stunting disease (RSD) (caused by Clavibacter xyli subsp. Xyli Davis) (resistant) in Florida.