Registration of 'CP 08-1968' sugarcane

Authors: DAVIDSON, WAYNE - Florida Sugarcane League; SCOTT, ANDY - Rio Farms, Inc; HERNANDEZ, EDUARDO - Rio Farms, Inc; Gordon, Vanessa; MCCORD, PER - Former ARS Employee; SANDHU, HARDEV - University Of Florida; Zhao, Duli; COMSTOCK, JACK - Former ARS Employee; Sood, Sushma; SINGH, MANINDER - Michigan State University; Islam, Md; BALTAZAR, MIGUEL - Florida Sugarcane League; McCorkle, Katherine

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/18/2019
Publication Date: 4/11/2019
Citation: Davidson, W., Scott, A., Hernandez, E., Gordon, V.S., McCord, P.H., Sandhu, H., Zhao, D., Comstock, J.C., Sood, S.G., Singh, M., Islam, M.S., Baltazar, M., McCorkle, K.M. 2019. Registration of 'CP 08-1968' sugarcane. Journal of Plant Registrations. 13:178-186. https://doi.org/10.3198/jpr2018.05.0034crc.
DOI: https://doi.org/10.3198/jpr2018.05.0034crc

Interpretive Summary: ‘CP 08-1968’ was developed through cooperative research conducted by the USDA-ARS, the University of Florida, and the Florida Sugar Cane League, Inc. It was tested at multiple locations for disease resistance and yield performance in Florida and Texas. CP 08-1968 was approved as a co-released cultivar by the Florida Sugarcane Variety Committee in 2017 for commercial use on sand soils in Florida and on all types of soils in Texas. Cane yield of CP 08-1968 on sand soils in Florida was 15.0 and 10.1% higher than that of CL 88-4730 and CP 89-2143 (two checks in Florida), respectively. Although CP 08-1968 had slightly low commercial recoverable sucrose, high cane yield resulted in 11.3 and 2.1% higher sucrose yield than CL 88-4730 and CP 89-2143, respectively. Compared to CP 72-1210 and CP 89-2143 (two commercial check cultivars), CP 08-1968 had 9.3 and 12.5%, respectively, higher cane yield in Texas. CP 08-1968 was released because of its high cane and sucrose yields, and its acceptable levels of resistance to brown rust, smut, Sugarcane mosaic virus strain E (mosaic), Sugarcane yellow leaf virus, and ratoon stunt.

Technical Abstract: ‘CP 08-1968’ (Reg. No. CV-185; PI 687332) sugarcane (a complex hybrid of Saccharum spp.) cultivar was developed through cooperative research conducted by the USDA-ARS, the University of Florida, and the Florida Sugarcane League, Inc. At the 5 June 2017 Florida Sugarcane Variety Committee Meeting, CP 08-1968 was released to growers for all soils in Texas; seedcane became available in September 2018. At the 30 October 2017 Florida Sugarcane Variety Committee Meeting, CP 08-1968 was approved as a co-release to growers with sand soils in Florida and all soils in Texas. CP 08-1968 was selected from a biparental cross of CP 01-1178 × CP 00-1301 made at Canal Point, FL, in November 2006. The female parent, CP 01-1178, and the male parent, CP 00-1301, are not commercial cultivars. Cane yield of CP 08-1968 on sand soils in Florida, averaged across nine harvests through three crop cycles (plant-cane, first-ratoon, and second-ratoon), was 15.0 and 10.1% higher (P < 0.1) than that of CL 88-4730, a commercial check for sand soils, and CP 89-2143, a high commercial recoverable sucrose (CRS) commercial check for muck and sand soils. Although CP 08-1968 had 2.8 and 6.0% lower CRS than CL 88-4730 and CP 89-2143, respectively (Glaz et al., 2000), high cane yield resulted in 11.3 and 2.1% higher (P < 0.1) sucrose yield than CL 88-4730 and CP 89-2143, respectively. CP 08-1968 was released because of its high cane and sucrose yields on sand soils, as well as its acceptable levels of resistance to brown rust, smut, Sugarcane mosaic virus strain E (mosaic), Sugarcane yellow leaf virus (Comstock et al., 1999), and ratoon stunt. CP 08-1968 is susceptible to orange rust and has moderate to good freeze tolerance. CP 08-1968 tested negative for the Bru1 quantitative trait locus, which is an indicator of brown rust resistance.