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Release: Trailblazer - switchgrass

This release is available in the marketplace

SymbolPAVI2
Release NameTrailblazer
Release Typecultivar
Description- A 25-clone synthetic that is similar to Pathfinder in maturity, appearance, and area of adaptation. Higher IVDMD than Pathfinder. Twelve of the 25 clones are from the Nebraska strain ff, while the remainder are from the ey strain. Hexaploid (2n=6x=54
SourceCollections from natural grasslands in Nebraska and Kansas.
Breeding MethodThe result of a genetic study designed to determine if the forage quality of switchgrass could be improved by restricted phenotypic selection and to obtain heritability estimates for in vitro dry-matter digestibility (IVDMD). Two Nebraska experimental strains, ey and ff, were used; both are similar to Pathfinder in maturity, origin, and breeding history. In 1974, approximately 800 plants that seemed to be superior for IVDMD were selected from a 1973 nursery planting of 2,200+ plants. Single-plant selections for high and low IVDMD were made in each of the nursery rows. In 1976, ramets from 25 of the high-IVDMD selections and from 25 of the low-IVDMD were transplanted to establish isolated high- and low-IVDMD polycross nurseries. Syn-1 seed was harvested from these nurseries in 1977 and from the same open-pollinated clones in the selection nursery in 1976 was used in 1978 to establish a replicated, seeded sward nursery in which the following strains were compared: high-IVDMD PC (Trailblazer), high-IVDMD OP, and low-IVDMD PC. Strains did not differ significantly for forage yield in any of three years; thus, the genetic gain in IVDMD was achieved without forage yield loss.
Intended UseA warm-season pasture grass.
Release Info1984, by USDA-ARS and Nebraska AES.

 

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