Registration of CP 72‐1210 Sugarcane 1 (Reg. No. 55)

‘CP 07‐2320’ (Reg. No. CV‐177, PI 681716) sugarcane, a complex hybrid of Saccharum spp., was developed through cooperative research conducted by the USDA‐ARS, the University of Florida, and the Florida Sugarcane League and was released to growers in September 2015. CP 07‐2320 was selected from a cross made at the USDA‐ARS Sugarcane Field Station in Canal Point, FL, in December 2005. The female parent was CP 02‐2065, and the male parent was CP 96‐1865. CP 07‐2320 was superior to the reference cultivar ‘CP 89‐2143’ for muck soils with regards to stalk population, stalk weight, cane yield, commercial recoverable sucrose (a measure of sucrose content), sucrose yield, and economic index (i.e., overall profitability). CP 07‐2320 was superior to the reference cultivar ‘CP 78‐1628’ for sand soils with respect to stalk weight, cane yield, commercial recoverable, sucrose yield, and economic index. The cultivar is resistant to brown rust (caused by Puccinia melanocephala H. & P. Sydow), leaf scald (caused by Xanthomonas albilineans Ashby, Dowson), and ratoon stunt (caused by Clavibacter xyli subsp. xyli Davis). CP 07‐2320 is susceptible to Sugarcane mosaic virus strain E (mosaic), based on the results of an artificial inoculation test, and is moderately susceptible to smut [Sporisorium scitamineum (Syd.) Piepenbring et al.], Sugarcane yellow leaf virus, and orange rust (Puccinia kuehnii E.J. Butler) under field conditions. This cultivar is recommended for both organic (muck) and mineral (sand) soils in Florida.

Section: Disease Evaluationmentioning

confidence: 99%

Registration of ‘CP 07‐2320’ Sugarcane

McCord¹,

Comstock²,

Zhao³

et al. 2017

“…CP 07-2137 was compared with susceptible commercial checks (at the upper end of acceptable susceptibility limits in Florida sugarcane production) for each disease in artiicial inoculation. he checks were CP 78-1628 for smut, CP 72-2086 for mosaic, CP 80-1743 for leaf scald, and 'CP 72-1210' (Miller et al, 1981) for ratoon stunt.…”

Section: Disease Resistancementioning

confidence: 99%

Registration of ‘CP 07‐2137’ Sugarcane

Sandhu

McCord²,

Comstock³

et al. 2016

‘CP 07‐2137’ (Reg. No. CV‐167, PI 676024) sugarcane (a complex hybrid of Saccharum spp.) was released in September 2014 to be cultivated on sandy soils (Entisols) in Florida. CP 07‐2137 was developed through a collaborative cultivar development program of the USDA‐ARS, the University of Florida, and the Florida Sugarcane League, Inc. based at Canal Point (CP), FL. The female parent of CP 07‐2137 is CP 01‐2390, a promising experimental clone on sand that was not released commercially due to its susceptibility to smut disease (caused by Sporisorium scitamineum). The male parent is a commercial sugarcane cultivar CP 84‐1198, cultivated on both muck (Histosols) and sand. CP 07‐2137 was released due to its significantly greater cane yield, sucrose yield, and economic index than the reference check (‘CP 78‐1628’), which is continuously to be the most favorable CP cultivar on sand for last several years. Overall mean cane yield, sucrose yield and economic index in CP 07‐2137 were 37, 44, and 45% greater than CP 78‐1628, respectively. CP 07‐2137 is also resistant to orange rust [caused by Puccinia kuehnii (Kruger) E. Butler] and leaf scald [caused by Xanthomonas albilineans (Ashby) Dowson] diseases. Although the Bru1 gene (brown rust resistance gene) was absent, CP 07‐2137 is moderately resistant to brown rust (caused by P. melanocephala Syd. & P. Syd.). CP 07‐2137 had poor freeze tolerance, ranking 48th in plant cane and 40th in first ratoon among 54 genotypes tested for their deterioration in sucrose content after exposure to freezing temperatures.

“…Susceptibility to ratoon stunt disease of CPCL 05-1201 was assessed for 3 yr in comparative inoculation tests with the reactions of 'CP 72-1210' (Miller et al, 1981;MIA 34313) and of 'CP 80-1827' (Glaz et al, 1990;PI 532837). he inoculations were done by cutting the seedcane of each genotype with a knife that was previously dipped into juice collected from plants infected with ratoon stunt disease.…”

Section: Disease Screeningmentioning

confidence: 99%

Registration of ‘CPCL 05‐1201’ Sugarcane

Edmé¹,

Davidson²,

Zhao³

et al. 2015

‘CPCL 05‐1201’ (Reg. No. CV‐163, PI 672485) is a sugarcane (Saccharum spp.) hybrid cultivar bred by United States Sugar Corporation, tested in the breeding program led by the USDA–ARS, University of Florida, and Florida Sugarcane League, and released to Florida growers in October 2012. CPCL 05‐1201 combines the high‐sucrose genes of its female parent (CL 87‐2882) with the high tonnage genes of its male parent (CL 93‐2679). In the final selection stage, CPCL 05‐1201 was compared with 21 genotypes for 3 yr (2008–2012) on organic and sand soils in south Florida and the freeze tolerance tested for 2 yr (2011–2013) in north Florida. CPCL 05‐1201 is recommended for planting on muck and sand soils and for the successive cropping system. On muck, CPCL 05‐1201 yielded 5 to 10% higher sucrose than reference cultivars ‘CP 78‐1628’ and ‘CP 89‐2143’. On sand, CPCL 05‐1201 yielded sucrose comparable to CP 89‐2143 and 4% more than CP 78‐1628. Owing to high tonnage and moderate level of sucrose, CPCL 05‐1201 was 11% more profitable on muck and 26% more profitable on sand than CP 78‐1628 or CP 89‐2143. No yield decline was observed with CPCL 05‐1201 under the successive system. In addition, CPCL 05‐1201 is resistant to the most important diseases in Florida, except for Sugarcane yellow leaf virus. CPCL 05‐1201 has the Bru1 gene in its genome and is resistant to brown rust (caused by Puccinia melanocephala H. & P. Sydow) and orange rust [caused by P. kuehnii (Kruger) E. Butler]. CPCL 05‐1201 has comparable freeze tolerance to CP89‐2143 to mild and severe freeze conditions.