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Warm Season Grasses. Seed Research of Oregon. Helen Lucas. Warm SeasonTurfgrass Species. Common Name Scientific Name Pollination Ploidy Bermudagrass Cynodon dactylon var. Cross Allotetraploid=36 Couchgrass dactylon

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Seed research of oregon

Warm Season Grasses

Seed Research of Oregon

Helen Lucas


Warm SeasonTurfgrass Species

  • Common Name Scientific Name Pollination Ploidy

  • Bermudagrass Cynodon dactylon var. Cross Allotetraploid=36 Couchgrass dactylon

  • Transvaalensis C. transvaalensis Cross Diploid=18

  • bermudagrass

  • Zoysiagrass Zoysia ssp. Cross Tetraploid = 40

  • Seashore paspalum Paspalum vaginatum Cross Diploid=20

  • Bahiagrass Paspalum notatum Apomict Tetraploid = 40

  • Cross Diploid = 20

  • St. Augustinegrass Stenotaphrum Cross Diploid = 18

  • (Buffalograss) secundatum Polyploid = 30


Warm SeasonTurfgrass Species

  • Common Name Scientific Name Pollination Ploidy

  • Centipedegrass Eremochloe ophiuroides Cross Diploid = 18

  • American Buffalograss Buchloe dactyloides Dioecious 20, 40, 60

  • Kikuyagrass Pennisetum clandestinum Cross Tetraploid = 36

  • Saltgrass Distichlis spicata Cross 2n = 36, 40


Warm Season Grass Breeding

  • Less total breeding public and private

  • Primary species couchgrass (bermudagrass), zoysia, buffalograss, seashore paspalum

  • Additional species centipedegrass, St. Augustine, bahiagrass

  • Most improved cultivars are vegetative - increase of single improved plants.

    • Sterile, low seed yields, difficult to process seeds, excellent vegetative growth, uniformity

  • New improvements in seeded types


Bermudagrass Breeding

  • Sterile triploid hybrids between Cynodon dactylon var. dactylon and C. transvaalensis primary varieties

    • USDA Tifton, GA - Tifgreen, Tifway, Tifdwarf, TifSport, TifEagle

    • Winter-hardy Kansas State - Midway, MidIron, Midlawn

  • Improved seeded cultivars - cold-hardiness, spring dead spot resistance, uniformity, speed of germination, leaf spot resistance, color, density, seed yield - Quality approaching vegetative cultivars


Seeding the future

SRO Seeded Bermudagrass Products

Yukon (exp. OKS91-11)

SR 9554

LaPaloma (exp. SRX 9500)

LaPrima Blend – blends are not included in NTEP

Seeding the Future …….


Seeded turf type bermudas

New projects

golf or sports fields

Renovations – far more acreage

existing common, turf-type seeded or vegetative bermuda

Entire South - Spring Recovery

re-establish bermuda base for better

Spring transition

Seeded Turf-Type Bermudas


Seeded turf type bermudas1

Southern Bermuda Belt

non-uniform appearance of existing bermuda

upgrade to improved variety

(disease tolerance, color/texture, divot repair, etc.)

Spring transition difficulties

Transition Zone

drought, salt or disease stress on existing rye/blue

Winter kill of your existing bermuda variety

Seeded Turf-Type Bermudas


Divot repair data
Divot Repair Data

Tifway 419

Tifsport


Spring dead spot resistance critical south and transition
Spring Dead Spot ResistanceCritical South AND Transition

  • Yukon & Midlawn

  • Highest resistance

  • Riviera & TifSport

  • Moderate resistance

  • Princess 77 & Tifway

  • Most susceptible


Drought stress reduced water supplies choose the right variety

“The most vigorously germinating cultivars under both drought and control conditions were (in decreasing order): YUKON (OKS91-11), Sahara, Mirage, and Pyramid. Four other cultivars exhibited low cumulative germination rates under all conditions: Panama (PST-R63), Savannah (PST-R64), Princess (FMC-77), and Sultan (FMC-8).” Dr. Ken Marcum – Univ. of AZ

Drought StressReduced Water SuppliesChoose the Right Variety


Zoysiagrass Breeding drought and control conditions were (in decreasing order): YUKON (OKS91-11), Sahara, Mirage, and Pyramid. Four other cultivars exhibited low cumulative germination rates under all conditions: Panama (PST-R63), Savannah (PST-R64), Princess (FMC-77), and Sultan (FMC-8).” Dr. Ken Marcum – Univ. of AZ

  • Finest textured, highest uniformity in vegetative cultivars - Zoysia japonica, Z. matrella and Z. pacifica

    • Texas A&M University - Reduced water use, cold-hardiness, shade tolerance, improved establishment and recovery

  • Improved seeded cultivars - Z. japonica and Z. sinica have larger seadheads more useful for seed production

    • More uniform than common, use on sports fields and homelawns


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