|SANDHU, HARDEV - University Of Florida|
|SINGH, MANINDER - University Of Michigan|
|DAVIDSON, WAYNE - Florida Sugarcane League|
|BALTAZAR, MIGUEL - Florida Sugarcane League|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/19/2018
Publication Date: 7/12/2018
Citation: Sandhu, H., McCord, P.H., Zhao, D., Comstock, J.C., Singh, M.P., Davidson, W.R., Gordon, V.S., Sood, S.G., Baltazar, M., McCorkle, K.M. 2018. Registration of ‘CP 09-1822’ Sugarcane. Journal of Plant Registrations. 12:333-339. https://doi.org/10.3198/jpr2017.11.0078crc.
Interpretive Summary: Reliable and consistent development of high-yielding sugarcane cultivars with enhanced resistance or tolerance to biotic and abiotic stresses is important for sugarcane growers. In the CP program in Florida, decisions to advance and commercially release sugarcane genotypes in the final three selection stages (i.e., Stages 2, 3, and 4) are made by a sugarcane variety committee of growers and scientists from the public and private sectors. Members of this committee recommended releasing CP 09-1822 for the Florida mineral (sand) soils at the committee meeting in June 2016 because of its high yields of cane and sucrose on sand soils compared with commercial reference cultivars CL 88-4730, CP 78-1628 and CP 89-2143. In multiple field trials, it demonstrated resistance or tolerance to most major and minor sugarcane diseases, including: brown and orange rusts, Sugarcane mosaic virus strain E, and Sugarcane yellow leaf virus, and moderately resistant to leaf scald and ratoon stunting disease (RSD) and moderately susceptible to smut. The high sucrose and cane yields for CP 09-1822 was mainly associated with high mean stalk weight resulting in significantly higher tonnage than the reference cultivars. CP 09-1822 demonstrates freezing tolerance at, or exceeding, the levels as observed across reference cultivars; indicating an ability to withstand freezing temperatures similar to the ones described in this registration.
Technical Abstract: ‘CP 09-1822’ (Reg. No. CV-180; PI 686942) sugarcane (a complex hybrid of Saccharum spp.) was released in June 2016 for commercial cultivation on sand (mineral) soils in Florida. This cultivar was developed through a collaborative sugarcane cultivar development program of the USDA-ARS, the University of Florida, and the Florida Sugar Cane League, Inc. based at Canal Point (CP), Florida. The parentage of CP 09-1822 was CP 01-2459 x CPCL 02-8021. CP 09-1822 had significantly greater mean stalk weight, tons of cane per hectare (TCH), tons of sugar per hectare (TSH) and economic index (EI) than the reference cultivars, CL 88-4730, CP 78-1628 and CP 89-2143 in nine harvests with three crops (plant cane, first ratoon, second ratoon) at each of the three locations. Mean economic index or profitability of CP 09-1822 was 21% higher than the second most common cultivar on sand soil, CL 88-4730 and 36% higher than the other two reference cultivars. CP 09-1822 is considered resistant to brown rust, orange rust, Sugarcane mosaic virus strain E, and Sugarcane yellow leaf virus, and moderately resistant to leaf scald and ratoon stunting disease (RSD) and moderately susceptible to smut. CP 09-1822 has Bru1 gene that provides resistance against brown rust. CP 09-1822 has ranked 9th among 32 tested genotypes for post-freeze temporal sucrose deterioration and showed moderate to high freeze tolerance.