Cultivar Development from Florida’s Annual Ryegrass Breeding Program. (C01-prine570215-poster)
Authors:
G. Prine* - University of Florida/IFAS A.R. Blount - University of Florida/IFAS P.E. Reith - University of Florida/IFAS
Abstract:
C.E. Webb developed the early annual ryegrass (Lolium multiflorum) cultivar, ‘Florida Rust
Resistant’ in 1965. Since 1971, Florida’s principal annual ryegrass breeder is the first author. We have used evolutionary recurrent mass selection from gridded nurseries as a means of developing new cultivars from a vast array of ryegrass genotypes and a large number of selection criteria. Our selection criterium on all cultivars has been for crown rust (Puccinia coronata) resistance and more recently for gray leaf spot (Pyricularia grisea) resistance. Tetraploid cultivars were developed from various tetraploid genotypes and two Florida diploid genotypes which were doubled by DSV in Germany.
Developed ryegrass cultivars are released by IFAS and exclusive rights are given to individual seed companies to produce and market seed. Seed companies plant prebreeding and breeder’s seed plantings in Oregon overseen by breeder. The named cultivars released so far are ‘Florida 80’,
‘Surrey’, ‘Big Daddy (4X)’, ‘Stampede’, ‘Brigadier’, ‘Natchez (4X)’, ‘Jumbo (4X)’, ‘Fantastic’,
‘Surrey II’, ‘Ed’, ‘Graze-N-Gro’, ‘King’, ‘Prine (4X)’, ‘Beef Builder III (4X)’ and ‘Florlina’. Other cultivars are in pipeline but not yet named. Recent crown rust index ratings, gray leaf spot and helminthosporium leaf spot (Dreschlera spp.) disease ratings will be reported.
Speaker Information: Gordon Prine, University of Florida/IFAS, Agronomy Department PO Box 110500, Gainesville, FL 32611-0500; Phone: 352-392-1811 x216; E-mail: [email protected]
Session Information: Monday, November 3, 2003, 4:00 PM-6:00 PM Presentation Start: 4:00 PM (Poster Board Number: 704)