Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/20/2004
Publication Date: 3/1/2005
Citation: Glaz, B., Tai, P.Y., Miller, J.D., Edme, S.J., Gilbert, R.A., Davidson, J., Dunckelman, J., Comstock, J.C. Registration of 'CP 89-2376' Sugarcane. Crop Science. 45:785. 2005. Interpretive Summary: Sugarcane is grown on about 450,000 acres in south Florida (mostly in the Everglades). There is a need to develop cultivars with improved disease resistance, sucrose content and cane yield to maintain the stability of the Florida sugarcane industry. Genetic resistance is the primary way to control diseases in sugarcane therefore, it is desirable to have a large number of cultivars being grown at any one time to reduce the genetic numerability to the introduction of new insects or diseases. CP 89-2376 is being released primarily because of high yield and its tolerance to high water tables during the growing season.
Technical Abstract: CP 89-2376 sugarcane (a complex hybrid of Saccharum officinarum L., S. barberi Jeswiet, S. spontaneum L., and S. sinense Roxb. amend. Jeswiet whose parentage is unknown. CP 89-2376 was developed through cooperative research conducted by the USDA-ARS, the University of Florida, and Florida Sugar Cane League, Inc. and was released in the fall of 2002. Stalks of CP 89-2376 have a heavy wax layer, are yellow-green under the leaf sheath, and are maroon in areas exposed to the sun. CP 89-2376 has a light green growth ring and the buds do not touch (subtends) the growth ring. CP 89-2376 has shown tolerance to high water tables during the growing season. CP 89-2376 was evaluated in eight yeild trials in three crops (8 plant cane, 8 first and 8 second-ratoon crops) on organic soils where its cane yield was 6.7% higher than that of CP 70-1133. The sucrose content of CP 89-2376 was 5.2% higher than that of CP 70-1133. Its sucrose yield was 12.7% higher than that of CP 70-1133.The theoretical economic index on organic soils for CP 89-2376 was predicted to be 19.3% higher than that of CP 70-1133. CP 89-2376 was evaluated in two yields trials in three crops (2 plant-cane, 1 first and 2 second-ratoon crops) on sand soils. The cane yield of CP 89-2376 in these tests was 81.6% of that of CP 70-1133. The sucrose content for CP 89-2376 was 4.9% higher, but its sucrose yield was only 85% of that of CP 70-1133. The theoretical economic index on sand soils for CP 89-2376 was predicted to be only 84% of that of CP 70-1133. CP 89-2376 has shown field resistance in Florida to eye spot[caused by Bipolaris sacchari (E.J. Butler) Shoemaker]; rust (caused by Puccinia melanocephala Syd. & P. Syd.); smut (caused by Ustilago scitaminea Syd. & P. Syd.); leaf scald [caused by Xanthomonas albilineans (Ashby) Dowson] and sugarcane mosaic virus strain E. Inoculated test results indicated that CP 89-2376 is moderately resistant to ratoon stunting disease (caused by Leifsonia (Clavibacter) xyli subsp. xyli Davis et al.). CP 89-2376 has a fiber content of 10.2% compared to 10.4% for CP 70-1133.