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By tradition, Kentucky bluegrass (Poa pratensis L.) turfgrass seed is sown in blends of two or more cultivars. The purpose of this study was to determine (i) the impact on turfgrass quality (TQ) of diluting a high-performing cultivar with a lower-performing one, (ii) whether the relationship between blend ratio and TQ is linear or nonlinear, and (iii) whether a certain quantity of diluent (lower-performing cultivar) can be tolerated without diminishing TQ. Three field trials were planted using an elite cultivar ('Award') blended with either a medium-('NuBlue') or low- ('Huntsville') performance cultivar. Nonlinear regression was used to test for a segmented curve: TQ = intercept + slope x (blend ratio--pivot point), where the slope is zeroed at blend ratios < pivot point. Adding Huntsville decreased TQ of Award on 71% of rating dates, adding NuBlue decreased TQ on 60% of dates, while adding Huntsville or NuBlue increased TQ on 4% of dates, all related to establishment. Pivot points were significant on 14 of 52 monthly means for Huntsville and two for NuBlue, indicating that under certain circumstances the lower-performing cultivar could serve as a diluent (seed price mitigator) at up to a 50:50 seed ratio, with little detriment on TQ after the first year. Lowering the cutting height to 13 mm from 32 mm in one trial year resulted in a 55% change in slope for Huntsville and 63% for NuBlue; pivot points were unchanged. More field research is needed to verify the many popular theories for blending bluegrass., SEED OF KENTUCKY BLUEGRASS is almost universally established as blends of two or more cultivars combined. This tradition of blending bluegrasses can be traced to early field studies of the [...]

`Caddieshack' perennial ryegrass (Lolium perenne L.) (Reg. No. CV-205, PI 613535), a turf-type cultivar, was developed and released in August 1998 by Simplot Turf and Horticulture, Post Falls, ID. Caddieshack's [...]

`Total Eclipse' Kentucky bluegrass (Poa pratensis L.) (Reg. no. CV-59, PI 603257) is a turf-type cultivar released in August 1996 by Simplot Turf and Horticulture, Post Falls, ID. Total Eclipse [...]

`Rugby II' Kentucky bluegrass (Poa pratensis L.) (Reg. no. CV-58, PI 599223) is a turf-type cultivar released in August 1996 by Simplot Turf and Horticulture, Post Falls, ID. Rugby II [...]

`Liberator' Kentucky bluegrass (Poa pratensis L.) (Reg. no. CV-56, PI 603099) is a turf-type cultivar released in August 1997, by Simplot Turf and Horticulture, Post Falls, ID. Liberator was tested [...]

`NuGlade' Kentucky bluegrass (Poa pratensis L.) (Reg. no. CV-57, PI 599221) is a turf-type cultivar released in August 1996 by Simplot Turf and Horticulture, Post Falls, ID. NuGlade was tested [...]

`Award' Kentucky bluegrass (Poa pratensis L.) (Reg. no. CV-55, PI 599222) is a turf-type cultivar released in August 1996 by Simplot Turf and Horticulture, Post Falls, ID. The experimental designations [...]

`Accent' perennial ryegrass (Lolium perenne L.) (Reg. no. CV-199, PI 607445), a turf-type diploid (2n=2x=14), was developed and released 11 August 1995 by J.R. Simplot Co. dba Jacklin Seed and [...]

`Top Gun', a turf-type, perennial ryegrass (Lolium perenne L.) (Reg. no. CV-200, PI 607529), was developed and released 4 Sept. 1998 by Simplot Turf and Horticulture dba Jacklin Seed, Post [...]

`Sundevil II' bermudagrass [Cynodon dactylon (L.) Pers] (Reg. no. CV-41, PI 618587) is a seed-propagated, turf-type cultivar developed and released by J.R. Simplot Co., Jacklin Seed Division, Post Falls, ID, [...]

`Goalkeeper' perennial ryegrass (Lolium perenne L.) (Reg. no. CV-218, PI 617039), a turf-type cultivar, was developed and released 24 August 1998 by 3.R. Simplot Co., Jacklin Seed Division, Post Falls, [...]

`Southern Star' bermudagrass [Cynodon dactylon (L.) Pers] (Reg. no. CV-40, PI 601996) is a seeded, turf-type cultivar developed and released by J.R. Simplot Co., Jacklin Seed Division, Post Falls, ID, [...]

`Caliber' Kentucky bluegrass (Poa pratensis L.) (Reg. no. CV-62, PI 595097) is a turf-type cultivar released August 1995 by Simplot/Jacklin Seed, Post Falls, ID, from germplasm obtained from the New [...]

`Odyssey' Kentucky bluegrass (Poa pratensis L.) (Reg. no. CV-64, PI 599226) is a turf-type cultivar released in August 1996 by Simplot/Jacklin Seed, Post Falls, ID. The experimental designations for Odyssey [...]

`J-36' Japanese zoysiagrass (Zoysia japonica Wild.) (Reg. no. CV-219, PI 573033), is a seed-propagated, turf-type cultivar developed and released by J.R. Simplot Co., Jacklin Seed Division, Post Falls, ID, in [...]

`Absolute' Kentucky bluegrass (Poa pratensis L.) (Reg. no. CV-61, PI 603098) is a turf-type cultivar released in August 1997 by Simplot / Jacklin Seed, Post Falls, ID. The experimental designations [...]

Presents a listing of the registration of cultivars in the United States. Development of `Tahoe' alfalfa by Forage Genetics; Details on the release of `Sundevil' bermudagrass by the Jacklin Seed Company and the Medalist America Seed Company; Information on the development of `Selkirk' winter rapeseed by the Idaho Agricultural Experiment Station.

The article provides an overview of the registration of Everest Kentucky bluegrass, a turf-type variety released in August 2004 by Jacklin Seed by Simplot in Post Falls, Idaho. The variety was derived from the open-pollinated progeny of Jacklin breeding line, 87-0057. It is closely similar to Barrister, differing from it by a shorter internode length below the panicle node, shorter seed length, and lower seed weight. Details on yield and agronomic traits, breeding conditions and method, maintenance, and growth habits are presented.

Offers information on GolfStar, a turf-ornamental Idaho bentgrass cultivar. Origin of the bentgrass cultivar; Description of cultivar; Availability of the cultivar.

Presents information on the cultivar, `Cheyenne,' a turf-type seed-producing tetraploid. Information on the development of the cultivar; When it was released; Where it originated from; Detailed information on the cultivar.

Presents information on `MX-86' sheep fescue (Festuca ovina L.) (registration number CV-62, PI 537103) released by Jacklin Seed Company. Origin on and background information on MX-86; Details on study conducted on MX-86.

Presents information on Jackpot bermudagrass [Cynodon dactylon (L.) Pers] Registration number CV-30, PI 584324. Details on Jackpot bermudagrass; Who developed Jackpot bermudagrass.

Presents information pertaining to the `APM' perennial ryegrass (Lolium perenne L.). Development of AMP; Background information on AMP; Details on APM study; Recommendations for AMP.