Indigocrisp and Other SHB Selections from the UF-IFAS Breeding Program Dr. Jim Olmstead February 20, 2014 UF Variety Release • Must adhere to current UF-IFAS standards - Tested in enough replication, locations, years, etc. - Chain of custody – developmental timeline, MTA agreements - Foundation stock - Plan for intellectual property protection and commercialization UF Variety Release • Release justification presented to Departmental and IFAS cultivar release committees. • After release, Florida Foundation Seed Producers, Inc. handles commercialization for the University of Florida. Royalties • UF – IFAS policy on release, protection and introduction of plant material: 70% of the royalty payment comes directly back to the breeding program Royalty payments fund the breeding program: salary, students, and infrastructure FL 98-325 (IndigocrispTM) FL 98-325 is an early maturing crisp-textured genotype best adapted to areas with chilling requirements similar to or higher than Gainesville, FL. The key positive attributes for FL 98-325 are: • • • • • • • Very firm, crisp texture similar to Bluecrisp and Sweetcrisp Earlier maturing than either Bluecrisp or Sweetcrisp Higher yields than existing crisp textured genotypes Potential for machine harvest for fresh market production Reduced postharvest bruising or pathogen damage Good flavor and size Good vegetative budbreak with high crop loads FL 98-325 (IndigocrispTM) Potential problems with FL 98-325: • Higher chill requirement means limited potential in expanding production areas in Florida (I-4 south). • Propagation by softwood stem cuttings has often resulted in low rooting percentages. • Susceptible to Botryosphaeria stem blight. • Darker fruit color 11/27/2012 1/30/2013 4/2/2012 11/27/2012 Field Ratings (2011-2013) 50% Bloom Harvest Genotype FL 98-325 Emerald Scintilla Star Date (DOY) 44 37 31 49 Timing Early-mid Mid-late Early-mid Mid Surv. 7 8 7 7 Sweetcrisp Farthing 41 45 Late Mid-late 9 9 5 9 6 5 5 6 7 7 9 9 9 9 8 6 Meadowlark 34 Early 7 7 7 7 8 6 8 7 Primadonna 41 Early-mid 8 4 6 6 6 7 6 8 Yield Leaf. Size Color 7 7 8 6 8 8 9 7 6 7 8 9 6 6 7 7 Scar Firm. Flavor 8 9 8 7 8 6 8 7 9 7 7 7 Lab Ratings (2013) Avg. Berry % Titrat. % Soluble SS/TA Firmness Genotype Wt. (g) Acidity Solids Ratio (g/mm) FL 98-325 2.55 ± 0.30 0.333 ± 0.04 12.1 ± 0.64 36.7 ± 6.0 250.66 ± 4.8 Emerald 2.54 ± 0.11 0.810 ± 0.16 12.0 ± 0.70 15.3 ± 4.0 190.09 ± 3.5 Scintilla 2.55 ± 0.30 0.599 ± 0.20 10.9 ± 2.55 20.0 ± 10.9 221.06 ± 7.1 Star 2.86 ± 0.43 0.646 ± 0.05 12.4 ± 0.42 19.2 ± 0.7 206.51 ± 7.6 Sweetcrisp 2.07 ± 0.25 0.556 ± 0.03 14.1 ± 0.14 25.4 ± 1.6 266.19 ± 6.1 Farthing 2.24 ± 0.18 0.606 ± 0.07 11.8 ± 0.21 19.5 ± 2.5 223.23 ± 7.9 Meadowlark 2.94 ± 0.02 0.402 ± 0.01 10.8 ± 0.92 26.8 ± 2.5 236.23 ± 12.9 Consumer Evaluation of Crisp Texture 40 35 gLMS (-100 to 100) 30 25 20 a a a a ab a ab ab ab b a ab ab bc bc c b c Texture 15 Flavor 10 Overall Liking 5 0 Consumer Evaluation of Crisp Texture 40 35 gLMS (-100 to 100) 30 25 20 a a a a ab a ab ab ab b a ab ab bc bc c b c Texture 15 Flavor 10 Overall Liking 5 0 Additional Information Mehra et al. 2013. Postharvest disease development on southern highbush blueberry fruit in relation to berry flesh type and harvest method. Plant Dis. 97:213-221 • Machine harvested fruit with crisp texture (including FL 98-325) had the same or lower postharvest disease incidence as hand harvested conventional texture fruit Takeda et al. 2013. Techniques for increasing machine harvest efficiency in southern highbush and rabbiteye blueberry. HortTechnology 23:430-436. • FL 98-325 had the highest packout percentages after machine harvest (94% - similar to hand harvest) Foundation Stock MTA 12-094 (AgriStarts, Inc.) allows for the initiation and propagation of FL 98-325 prior to license offerings. • Initiation completed winter 2012-13, multiplication stage currently Initial budwood distribution will be limited. Breeder stock is maintained at the PSREU at Citra. Contact Florida Foundation Seed Producers for license information • 352-273-3656 • www.ffsp.net Summary • FL 98-325 is an early-maturing, crisp genotype which will add another machine harvest for fresh market suitable variety to the short list currently available to Southeastern blueberry growers. • Unreliable propagation has been the biggest difficulty in the past. We hope to minimize this problem by making tissue culture plantlets available at the time licenses are offered. • FL 98-325 consistently ranks higher in yield than other crisptextured genotypes, and the sugar/acid ratio beats many current varieties. Dec. 2013 Jan. 2014 Feb. 2014 Feb. 2014 after H.C. Harvest Timing Total pounds/week for 5 bushes (3-yr old planting) Week of Year FLSel01 Jewel 5 3.00 0 6 0 0 7 1.19 0 8 0.88 0 9 0 0 10 3.63 0 11 2.75 0 12 5.38 0 13 3.76 0 14 4.32 5.69 15 4.82 8.45 16 2.69 16.7 17 3.44 4.50 18 4.19 8.69 19 1.38 0.88 Total (Pound/5 bush) 41.43 44.91 Pound/acre (1800 plants) 15,000 16,000 Dr. Jim Olmstead UF-IFAS Horticultural Sciences Dept. 2211 Fifield Hall Gainesville, FL 32611 (352) 273-4837 http://www.hos.ufl.edu/faculty/jwolmstead