Location: Sugarcane Field StationTitle: Registration of ‘CP 07-2137’ sugarcane Author
|Sandhu, Hardev - University Of Florida|
|Singh, Maninder - University Of Florida|
|Davidson, Wayne - Florida Sugarcane League|
|Glynn, Neil - Syngenta|
|Gilbert, Robert - University Of Florida|
|Baltazar, Miguel - Florida Sugarcane League|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/12/2015
Publication Date: 6/14/2016
Citation: Sandhu, H., Mccord, P.H., Comstock, J.C., Edme, S.J., Zhao, D., Singh, M., Davidson, W., Glaz, B.S., Sood, S.G., Glynn, N.C., Gilbert, R., Gordon, V.S., Baltazar, M., Mccorkle, K.M. 2016. Registration of ‘CP 07-2137’ sugarcane. Journal of Plant Registrations. 10(3):265-270.
Interpretive Summary: Field data from three crops (plant cane and first- and second-ratoon crops) at multiple locations suggest CP 07-2137 yielded well in commercial sugarcane fields on sand soils, but not on muck soils in Florida. Therefore, CP 07-2137 was released for growers to use on sand soil only in Florida. CP 07-2137 was released because of its significantly greater cane yield, sucrose yield and economic index than CP 78-1628 (a commercial check cultivar on san soils). Compared to CP 78-1628, CP 07-2137 had 37% higher cane yield, 3.1% higher commercial recoverable sucrose, 44% higher sucrose yield, and 31% greater economic index. CP 07-2137 was released because of its high cane and sucrose yields and greater economic index on sand soils and its acceptable levels of resistance to orange rust, leaf scald, and moderate resistance to brown rust and ratoon stunt. CP 07-2137 has some weaknesses, such as susceptible to smut, moderately susceptible to sugarcane mosaic virus, and relatively poor freeze tolerance compared to the check cultivar.
Technical Abstract: ‘CP 07-2137’ (Reg. No.__; PI__) sugarcane (a complex hybrid of Saccharum spp.) was released in September 2014 to be cultivated on sandy (mineral) soils in Florida. CP 07-2137 was developed through a collaborative cultivar development program of the USDA-ARS, the University of Florida, and the Florida Sugar Cane League, Inc. based at Canal Point (CP). The female parent of CP 07-2137 is CP 01-2390, a promising clone on sand but it was not released commercially due to its susceptibility to smut disease. The male parent is a commercial sugarcane cultivar CP 84-1198, cultivated on both muck and sand. CP 07-2137 was released due to its significantly greater cane biomass yield, sucrose yield and economic index than reference check, CP 78-1628. Overall mean cane biomass yield, sucrose yield and economic index in CP 07-2137 were 37, 44, and 31 % greater than CP 78-1628, respectively. CP 07-2137 is also resistant to orange rust (caused by Puccinia kuehnii E. J. Butler) and leaf scald (caused by Xanthomonas albilineans Ashby, Dowson), and moderately resistant against brown rust (caused by Puccinia melanocephala H. & P. Sydow) and ratoon stunt disease in Florida. Although Bru 1 gene is absent, CP 07-2137 is moderately resistant to brown rust (caused by Puccinia melanocephala H. & P. Sydow). CP 07-2137 had poor freeze tolerance with its rank 48th in plant cane and 40th in first ratoon among 54 genotypes tested for their deterioration in sucrose content after exposure to freezing temperatures in plant cane.