Kentucky bluegrass designated ‘Ba81-227’

Information

  • Patent Grant
  • PP12435
  • Patent Number
    PP12,435
  • Date Filed
    Friday, November 10, 2000
    24 years ago
  • Date Issued
    Tuesday, March 5, 2002
    23 years ago
  • US Classifications
    Field of Search
    • US
    • PLT 393
  • International Classifications
    • A01H500
    • Term Extension
      16
Abstract
A variety of Kentucky bluegrass having a medium to high level of resistance to melting out, leaf spot, summer patch, stem rust and crown rust, a medium green color throughout the growing season; good fall color, good winter color during mild winters; the ability to form a good quality turf under a wide variety of environmental conditions providing good sod strength and good tolerance to wear; and a medium to high level of seed yielding capacity.
Description




BACKGROUND OF THE INVENTION




1. Field of the Invention




The present invention relates to a new and distinct variety of


Poa pratensis


that has been designated ‘Ba81-227’ Kentucky bluegrass.




2. Description of Related Art




Kentucky Bluegrasses have been disclosed in U.S. Plant Pat. No. 3,150, issued May 2, 1972; U.S. Plant Pat. No. 3,156, issued May 9, 1972; U.S. Plant Pat. No. 3,186, issued May 23, 1972; U.S. Plant Pat. No. 4,336, issued Nov. 28, 1978; U.S. Plant Pat. No. 6,280, issued Sep. 6, 1988; U.S. Plant Pat. No. 6,537 and 6,538, issued on Jan. 17, 1989; U.S. Plant Pat. No. 6,585, issued Feb. 7, 1989; U.S. Plant Pat. No. 7,831, issued Mar. 17, 1992; U.S. Plant Pat. No. 8,490, issued Dec. 7, 1993; U.S. Plant Pat. No. 9,036, issued Jan. 3, 1995; U.S. Plant Pat. No. 9,290, issued Jul. 18, 1995; U.S. Plant Pat. No. 9,611, issued Jul. 23, 1996; U.S. Plant Pat. No. 9,848, issued Apr. 1, 1997; U.S. Plant Pat. No. 9,977, issued Jul. 22, 1997; U.S. Plant Pat. No. 10,080, issued Oct. 21, 1997; U.S. Plant Pat. No. 10,081, issued Oct. 21, 1997; U.S. Plant Pat. No. 10,384, issued May 5, 1998; U.S. Plant Pat. No. 10,925, issued May 25, 1999; U.S. Plant Pat. No. 11,520, issued Sep. 26, 2000; U.S. Plant Pat. No. 11,536, issued Oct. 3, 2000; and pending U.S. Plant patent application Ser. No. 09/120,718, filed Jul. 22, 1998, as well as U.S. Plant patent application Ser. No. 09/578,128, filed May 24, 2000.




SUMMARY OF THE VARIETY




‘Ba81-227’ plant material originated from a single plant that was a progeny resulting from crossing ‘Ba79-127’ Kentucky bluegrass, as the seed parent, with ‘Ba79-129’ Kentucky bluegrass, as the pollen parent.




‘Ba79-127’ Kentucky bluegrass is an unreleased, unpatented Kentucky bluegrass plant grown and maintained in the plant nursery at the Scotts Company in Marysville, Ohio and was derived from a plant selected from ‘Newport’ Kentucky bluegrass. ‘Ba79-129’ Kentucky bluegrass is an unreleased, unpatented Kentucky blue grass plant grown and maintained in the plant nursery at the Scotts Company in Marysville, Ohio and was derived from a plant selected from ‘Vantage’ Kentucky bluegrass.




As a result of this breeding, a distinct variety was produced and asexually propagated by rhizomes, tillers and disseminules. The highly apomictic seed of ‘Ba81-227’ Kentucky bluegrass was produced first at Marysville, Ohio, and later at Gervais, Oreg. This seed was used to plant turf performance evaluation trials and later, seed production fields.




The seed of ‘Ba81-227’ has been found to be stable. Asexual production of ‘Ba81-227’ initially was performed at Marysville, Ohio by propagules (tillers and rhizomes) and by disseminules (modified caryopses produced by apomixis), and has consistently produced progeny plants indistinguishable from the first generation asexual reproductions of the instant plant. The apomixis level of ‘Ba81-227’ is approximately 94.0% (plus or minus 3.7%). The apoximis level was determined by examining seedling characteristics of approximately 75 to 150 seedlings from seven different crop years in a growth chamber and any seedling with one or more characteristics different from ‘Ba81-227’ seedlings was classified as not being of apomictic origin.




‘Ba81-227’ has a number of highly desirable characteristics, including a medium to high level of resistance to


Drechslera poae


that causes melting out and leaf spot; a medium to high level of resistance to


Magnaporthe poae


that causes summer patch; a medium to high level of resistance to


Ustilago striiformis


that causes stripe smut, a medium level of resistance to


Erysiphe graminis


that causes powdery mildew, a medium to high level of resistance to


Puccinia graminis


that causes stem rust, and a medium to high level of resistance to


Puccinia coronata


that causes crown rust. ‘Ba81-227’ has an attractive leafy turf type, and a medium green color which can be maintained throughout the entire growing season. ‘Ba81-227’ provides good sod strength and good tolerance to wear. ‘Ba81-227’ demonstrates good fall color and good winter color under mild winter conditions.




‘Ba81-227’ is an overall good turfgrass performer as evidenced by good scores for quality and color throughout the cool season in turfgrass growing regions of the United States. ‘Ba81-227’ has a medium to high seed yield potential in the bluegrass seed production region of the northwestern United States.




In comparison with other Kentucky bluegrass varieties, ‘Ba81-227’ has a larger seed (longer and wider) with a lower number of seeds per pound. The vegetative leaves of unmowed mature plants of ‘Ba81-227’ Kentucky bluegrass are thicker with longer ligules and with fewer hairs on the upper margin of the ligule, collar margin and dorsal side of the leaf sheath than other Kentucky bluegrasses. The culm is longer with a longer top internode than other Kentucky bluegrass varieties.











BRIEF DESCRIPTION OF THE DRAWING





FIG. 1

is a ‘Ba81-227’ Kentucky bluegrass panicle;





FIG. 2

is a ‘Ba81-227’ Kentucky bluegrass seed; and





FIG. 3

is a ‘Ba81-227’ Kentucky bluegrass plant shortly after completing anthesis.











DETAILED DESCRIPTION OF THE VARIETY




‘Ba81-227’ Kentucky bluegrass (


Poa pratensis


L.) is perennial with creeping rhizomes forming a dense turf. When plants overwinter in the field under freezing temperatures and are then brought into the greenhouse during late winter to continue growth undisturbed by clipping under moderate temperatures (60-80° F.), culms are erect averging 49.3 cm in length. The uppermost internode averages 10.23 cm in length. The peduncle averages 23.3 cm in length and 0.80 mm in width. The vegetative leaf averages 30.5 cm in length, 3.8 mm in width, 0.36 mm in thickness and the ligule 0.40 mm in length. The flag leaf averages 5.6 cm in length, 3.2 mm in width, 0.10 mm in thickness and a ligule length of 0.95 mm. The flag leaf averages fewer hairs on the ligule than other varieties.




The panicle averages 7.8 cm in length, 5.3 cm in width, and has 6.4 whorls. The lowest whorl and the third whorl from the bottom of the panicle both average 2.5 branches, respectively. A spikelet in the lowest whorl averages 4.6 mm in length, 2.1 mm in width, 1.9 florets and the outer glume and inner glume average 2.6 mm and 3.3 mm in length, respectively. A spikelet from the third whorl from the bottom of the panicle averages 4.5 mm in length, 2.8 mm in width, 3.1 florets, and the outer glume and inner glume averages 3.3 mm and 3.7 mm in length, respectively.




For the vegetative leaf, the number of hairs is below average for the leaf sheath margin, below average for the dorsal side of the leaf sheath, below average for the upper margin of the ligule, and below average for the collar margin compared to other varieties. ‘Ba81-227’ differs from the other Kentucky bluegrass varieties in regard to such morphological characteristics as seed length and width, culm length, top internode length, number of nodes in the culm, vegetative leaf ligule length, and hairs on the upper margin of the vegetative leaf ligule, on the collar margins of the vegetative leaf, on the dorsal side of the vegetative leaf sheath, on the upper surface of the vegetative leaf, and on the ligule of the flag leaf.




Since environmental conditions such as soil and climate may influence morphological characteristics to some extent, comparisons of ‘Ba81-227’ were made with other Kentucky bluegrass varieties under like conditions and the comparisons are set forth in Tables 1-7, as follows.












TABLE 1











Morphological Comparisons of Peduncles, Culms, Nodes, and Top






Internodes of ‘Ba81-227’ with Other Kentucky Bluegrass Varieties






in the Greenhouse at Marysville, Ohio.





















Top







Peduncle




Peduncle




Culm





Internode







Length




Width




Length




Number




Length






Variety




(cm)




(mm)




(cm)




of Nodes




(cm)



















‘Ba81-227’




23.32




0.80




49.3




2.1




10.23






‘Abbey’




23.20




0.87




45.1




3.0




7.44






‘Ascot’




21.17




0.73




40.6




2.2




6.54






‘Coventry’




22.54




0.79




42.8




2.6




8.22






‘Envicta’




20.78




0.90




45.7




2.9




7.57






LSD (.05)




2.39




0.09




2.8




0.4




1.56






















TABLE 2











Morphological Comparisons of Vegetative Leaves of ‘Ba81-227’ and






Other Kentucky Bluegrass Varieties in the Greenhouse at






Marysville, Ohio.
















Length




Width




Thickness




Ligule Length






Variety




(cm)




(mm)




(mm)




(mm)


















‘Ba81-227’




30.46




3.80




0.359




0.40






‘Abbey’




29.39




3.70




0.303




0.33






‘Ascot’




25.19




3.61




0.288




0.29






‘Coventry’




29.92




3.18




0.267




0.24






‘Envicta’




26.94




3.71




0.276




0.34






LSD (.05)




3.69




0.37




0.037




0.04






















TABLE 2











Morphological Comparisons of Vegetative Leaves of ‘Ba81-227’ and






Other Kentucky Bluegrass Varieties in the Greenhouse at






Marysville, Ohio.
















Length




Width




Thickness




Ligule Length






Variety




(cm)




(mm)




(mm)




(mm)


















‘Ba81-227’




30.46




3.80




0.359




0.40






‘Abbey’




29.39




3.70




0.303




0.33






‘Ascot’




25.19




3.61




0.288




0.29






‘Coventry’




29.92




3.18




0.267




0.24






‘Envicta’




26.94




3.71




0.276




0.34






LSD (.05)




3.69




0.37




0.037




0.04






















TABLE 4











Morphological Comparisons for Panicle Length and Width, Whorl






Number and Whorl Branches of ‘Ba81-227’ and Other Kentucky






Bluegrass Varieties Grown in the Greenhouse at Marysville, Ohio.















Panicle





Number of Branches

















Length




Width




Whorl




Lowest




Third






Variety




(cm)




(cm)




No.




Whorl




Whorl









‘Ba81-227’




7.80




5.35




6.4




2.5




2.5






‘Abbey’




8.29




6.62




5.9




3.6




3.3






‘Ascot’




7.14




5.92




5.4




2.4




2.2






‘Coventry’




7.00




6.05




5.4




3.2




3.2






‘Envicta’




8.24




7.30




5.8




4.4




3.5






LSD (0.5)




0.73




0.94




0.6




0.7




0.5






















TABLE 4











Morphological Comparisons for Panicle Length and Width, Whorl






Number and Whorl Branches of ‘Ba81-227’ and Other Kentucky






Bluegrass Varieties Grown in the Greenhouse at Marysville, Ohio.















Panicle





Number of Branches

















Length




Width




Whorl




Lowest




Third






Variety




(cm)




(cm)




No.




Whorl




Whorl









‘Ba81-227’




7.80




5.35




6.4




2.5




2.5






‘Abbey’




8.29




6.62




5.9




3.6




3.3






‘Ascot’




7.14




5.92




5.4




2.4




2.2






‘Coventry’




7.00




6.05




5.4




3.2




3.2






‘Envicta’




8.24




7.30




5.8




4.4




3.5






LSD (0.5)




0.73




0.94




0.6




0.7




0.5






















TABLE 6











Morphpological Comparisons of Glume Size of ‘Ba81-227’ and






Other Kentucky Bluegrass Varieties in the Greenhouse at






Marysville, Ohio.














Outer Glume Length (mm)




Inner Glume Length (mm)
















Lowest





Lowest







Variety




Whorl




Third Whorl




Whorl




Third Whorl









‘Ba81-227’




2.63




3.32




3.29




3.68






‘Abbey’




2.69




2.82




3.04




3.36






‘Ascot’




3.32




3.54




3.70




3.66






‘Coventry’




2.71




2.92




3.20




3.23






‘Envicta’




2.82




2.79




3.20




3.30






LSD (.05)




0.34




0.28




0.30




0.25






















TABLE 6











Morphpological Comparisons of Glume Size of ‘Ba81-227’ and






Other Kentucky Bluegrass Varieties in the Greenhouse at






Marysville, Ohio.














Outer Glume Length (mm)




Inner Glume Length (mm)
















Lowest





Lowest







Variety




Whorl




Third Whorl




Whorl




Third Whorl









‘Ba81-227’




2.63




3.32




3.29




3.68






‘Abbey’




2.69




2.82




3.04




3.36






‘Ascot’




3.32




3.54




3.70




3.66






‘Coventry’




2.71




2.92




3.20




3.23






‘Envicta’




2.82




2.79




3.20




3.30






LSD (.05)




0.34




0.28




0.30




0.25














The seed of ‘Ba81-227’ was conditioned by removing most of the extraneous materials that may have been harvested with the seed, such as small pieces of plant stems and leaves, soil particles, seed of other plants, hair attached to the seed and the like. This conditioned seed of ‘Ba81-227’ averages 3.37 mm in length, and 0.96 mm in width. ‘Ba81-227’ has about 871,200 seeds per pound.




Comparisons of ‘Ba81-227’ with other Kentucky bluegrass varieties in terms of seed numbers per pound and other seed characteristics are shown in Tables 8-9 as follows:












TABLE 8











Morphological Comparisons of Conditional Seed of ‘Ba81-227’ and






Other Kentucky Bluegrass Varieties.















Variety




Length (mm)




Width (mm)











‘Ba81-227’




3.37




0.96







‘Abbey’




2.99




0.84







‘Ascot’




3.19




0.82







‘Conventry’




2.62




0.77







‘Envicta’




3.20




0.88







LSD (.05)




0.16




0.06























TABLE 9











Comparison of Seeds Per Pound of ‘Ba81-227’ and Other






Kentucky Bluegrass Varieties After Conditioning.














Variety




Seeds per Pound


















‘Ba81-227’




817,200







‘Abbey’




1,003,000







‘Ascot’




1,039,400







‘Conventry’




1,374,700







‘Envicta’




860,930







‘Famous’




1,127,500







‘Goldrush’




942,700







‘Misty’




1,126,400







‘Nottingham’




1,071,300







‘Raven’




1,001,400







‘Sidekick’




987,300







LSD (.05)




38,080















‘Ba81-227’ has performed well throughout the U.S. as exhibited by good turf quality ratings in both the sun and shade in comparison with other Kentucky bluegrass varieties. In addition, it has a medium green color with good turf density which can be maintained throughout the growing season providing good sod strength and good tolerance to wear, and a medium to high seed yielding capacity.




With regard to a comparative analysis conducted for purposes of determining color of ‘Ba81-227’ plants relative to other Kentucky bluegrass varieties, readings were taken of the vegetative color of ‘Ba81-227’ during mid-October while the turf was actively growing with adequate nutrient and water availability. The readings were taken in full sun with several actively growing leaves being compared, one at a time, utilizing color chips from the Munsell Book of Color as a reference. On this basis, the color of ‘Ba81-227’ was determined to be 5 GY ¾. During the same time period, the color of similar leaves of other Kentucky bluegrass varieties were determined by the same procedure to be as follows: ‘Ascot’—5 GY 4/4; Buckingham—7.5 GY 4/4; ‘Envicta’—5 GY 4/4, ‘Nottingham’—5 GY 4/6; ‘Midnight’—7.5 GY 4/4; ‘Abbey’—5 GY 4/6; and ‘Victa’—5 GY 4/4. However, it should be noted that the general apparent color of turf does not always correlate directly with the color of the individual actively growing leaves within the turf and that turf color varies with nutrient level and time of year with some varieties being darker or lighter green, depending on such factors.




Comparisons of ‘Ba81-227’ with other Kentucky bluegrass varieties for quality, genetic color, fall color, winter color, turf density, leaf texture, wear tolerance, sod strength and spread (lateral growth while being mowed), and seed yield are set forth hereinafter in Tables 10-17 as follows.












TABLE 10











A Comparison of Quality of ‘Ba81-227’ and Other Kentucky Bluegrass






Varieties as Affected by Environmental Conditions.














Shade


1






Sun


2





















‘Ba81-227’




4.9




5.6







‘Abbey’




4.2




5.4







‘Allure’




5.4




5.5







‘America’




5.3




6.1







‘Ascot’




5.4




5.4







‘Baron’




3.7




5.2







‘Blacksburg’




3.6




6.0







‘Challenger’




4.5




5.4







‘Classic’




4.7




5.5







‘Coventry’




5.1




5.5







‘Eclipse’




4.6




5.9







‘Envicta’




5.1




5.4







‘Glade’




4.4




5.9







‘Goldrush’




4.7




5.3







‘Haga’




5.0




5.5







‘Kenblue’




3.2




4.8







‘Limousine’




4.8




5.5







‘Midnight’




3.2




6.4







‘Misty’




4.4




5.4







‘Raven’




3.4




5.5







‘Sebring’




4.7




5.5







‘Sidekick’




4.3




5.3







‘Unique’




5.3




6.1







LSD (.05)




1.6




0.2













Rating Scale: 0-9; 9 = Excellent.













1


From Maryland













2


From 26 different locations in the U.S.





















TABLE 11











A Comparison of Quality of ‘Ba81-227’ and Other Kentucky Bluegrass






Varieties as Affected by Climatic Regions in the U.S.















Transition




Cool




Cool







Zone


1






Humid


2






Arid


3






















‘Ba81-227’




5.1




5.8




6.2







‘Abbey’




5.1




5.5




6.2







‘Allure’




5.1




5.6




6.1







‘America’




5.8




6.2




6.1







‘Ascot’




4.7




5.5




6.3







‘Baron’




4.7




5.2




6.2







‘Blacksburg’




5.1




6.4




6.7







‘Challenger’




4.9




5.5




6.3







‘Classic’




5.2




5.6




6.0







‘Coventry’




5.0




5.7




6.0







‘Eclipse’




5.5




6.0




6.0







‘Envicta’




5.1




5.3




6.1







‘Glade’




5.2




6.1




6.5







‘Goldrush’




4.9




5.3




6.1







‘Haga’




5.3




5.6




5.7







‘Kenblue’




4.6




4.9




5.2







‘Limousine’




4.4




5.9




5.9







‘Midnight’




6.3




6.4




6.6







‘Misty’




4.6




5.7




6.1







‘Raven’




4.9




5.6




6.1







‘Sebring’




5.1




5.6




6.3







‘Sidekick’




5.3




5.3




5.6







‘Unique’




6.1




6.2




6.3







LSD (.05)




0.4




0.2




0.4













Rating Scale: 0-9; 9 = Excellent.













1


From 8 different locations in the U.S.













2


From 15 different locations in the U.S.













3


From 3 different locations in the U.S.





















TABLE 12











A Comparison of Genetic Color, Fall Color and Winter Color of






‘Ba81-227’ and Other Kentucky Bluegrass Varieties

















Genetic




Fall




Winter







Variety




Color


1






Color


2






Color


3













‘Ba81-227’




6.1




4.3




4.7







‘Abbey’




6.4




4.7




4.6







‘Allure’




6.2




4.0




4.3







‘America’




6.7




4.3




4.2







‘Ascot’




6.8




4.0




4.3







‘Baron’




6.6




4.7




3.6







‘Blacksburg’




7.1




5.3




4.8







‘Challenger’




6.7




4.7




5.1







‘Classic’




6.1




4.3




5.8







‘Coventry’




6.2




4.7




4.0







‘Eclipse’




6.4




4.3




5.2







‘Envicta’




6.7




5.7




3.9







‘Glade’




7.3




4.7




3.9







‘Goldrush’




6.5




4.3




3.6







‘Haga’




5.9




4.7




4.9







‘Kenblue’




5.5




3.7




4.4







‘Limousine’




5.7




4.0




3.6







‘Midnight’




7.7




5.3




3.7







‘Misty’




6.4




4.3




5.5







‘Raven’




6.5




5.0




3.8







‘Sebring’




7.4




4.3




3.6







‘Sidekick’




6.3




4.0




5.3







‘Unique’




6.4




4.3




4.1







LSD (.05)




0.2




1.2




0.7













Ratings 1-9; 9 = Dark Green.













1


From 25 different locations in the U.S.













2


From 1 location in the U.S.













3


From 4 different locations in the U.S.





















TABLE 13











A Comparison of Turf Density of ‘Ba81-227’ and Other






Kentucky Bluegrass Varieties













Turf Density
















Variety




Spring


1






Summer


2






Fall


3













‘Ba81-227’




7.3




6.6




7.0







‘Abbey’




6.8




6.7




6.7







‘Allure’




7.5




6.9




7.0







‘America’




7.0




7.0




7.3







‘Ascot’




7.2




6.8




7.1







‘Baron’




6.9




6.7




6.8







‘Blacksburg’




7.2




7.4




7.4







‘Challenger’




7.0




6.8




6.8







‘Classic’




7.1




6.4




6.7







‘Coventry’




7.4




6.8




6.8







‘Eclipse’




7.0




6.5




7.1







‘Envicta’




6.9




6.8




6.9







‘Glade’




7.1




7.2




7.1







‘Goldrush’




7.1




6.9




6.8







‘Haga’




7.2




6.6




6.9







‘Kenblue’




5.9




6.3




6.5







‘Limousine’




7.6




7.8




7.6







‘Midnight’




7.5




7.4




7.4







‘Misty’




7.0




6.8




7.1







‘Raven’




7.1




6.6




6.8







‘Sebring’




6.7




6.8




6.8







‘Sidekick’




6.8




6.4




6.5







‘Unique’




7.2




7.0




7.5







LSD (.05)




0.5




0.3




0.4













Density Rating: 1-9; 9 = maximum density.













1


From 8 different locations in the U.S.













2


From 9 different locations in the U.S.













3


From 12 different locations in the U.S.





















TABLE 14











A Comparison of Leaf Texture of ‘Ba81-227’ and Other Kentucky






Bluegrass Varieties














Variety




Texture


1













‘Ba81-227’




5.7







‘Abbey’




5.5







‘Allure’




5.8







‘America’




6.7







‘Ascot’




6.0







‘Baron’




5.7







‘Blacksburg’




6.3







‘Challenger’




6.2







‘Classic’




6.2







‘Coventry’




5.6







‘Eclipse’




6.0







‘Envicta’




5.5







‘Glade’




6.5







‘Goldrush’




6.0







‘Haga’




6.4







‘Kenblue’




6.9







‘Limousine’




7.0







‘Midnight’




6.4







‘Misty’




5.2







‘Raven’




5.6







‘Sebring’




6.0







‘Sidekick’




5.1







‘Unique’




6.8







LSD (.05)




0.3













Texture Rating: 1-9; 9 = fine texture.













1


From 24 different locations in the U.S.





















TABLE 15











A Comparison of Wear Tolerance, Sod Strength, and Spread of






‘Ba81-227’ and Other Kentucky Bluegrass Varieties

















Wear




Sod








Variety




Tolerance


1






Strength


2






Spread


3













‘Ba81-227’




5.3




51.7




29.1







‘Abbey’




4.7




41.0




25.0







‘Allure’




5.0




40.7




28.6







‘America’




6.0




51.7




27.3







‘Ascot’




4.3




50.0




27.0







‘Baron’




4.3




29.7




25.6







‘Blacksburg’




3.3




5.0




23.6







‘Challenger’




4.7




54.3




27.9







‘Classic’




5.7




38.7




29.6







‘Coventry’




6.3




50.3




27.6







‘Eclipse’




4.3




28.3




28.0







‘Envicta’




5.0




36.7




24.5







‘Glade’




5.0




29.7




25.1







‘Goldrush’




3.7




52.0




27.9







‘Haga’




5.3




44.3




24.8







‘Kenblue’




6.3




35.3




25.1







‘Limousine’




4.7




22.0




22.9







‘Midnight’




4.7




57.0




26.0







‘Misty’




4.3




45.0




22.5







‘Raven’




4.0




37.0




26.5







‘Sebring’




5.3




21.3




22.9







‘Sidekick’




6.0




41.7




28.0







‘Unique’




5.7




55.0




29.1







LSD (.05)




1.7




29.4




4.7















1


From Iowa Rating Scale: 1-9; 9 = Most tolerant to wear.













2


From Nebraska. Rating Scale: Kilograms of tension needed to tear sod













3


From Maryland. Rating Scale: Mean diameter (cm) of plants.





















TABLE 16











A Comparison of Seed Yield (Pounds per Acre) of ‘Ba81-227’ and Other






Kentucky Bluegrass Varieties at Gervais, Oregon.















Seed








Yield







Variety




(lbs/A)











‘Ba81-227’




795







‘Abbey’




755







‘Coventry’




569







LSD (.05)




153























TABLE 16











A Comparison of Seed Yield (Pounds per Acre) of ‘Ba81-227’ and Other






Kentucky Bluegrass Varieties at Gervais, Oregon.















Seed








Yield







Variety




(lbs/A)











‘Ba81-227’




795







‘Abbey’




755







‘Coventry’




569







LSD (.05)




153















Turf diseases are one of the major causes of inconsistent and poor turf performance. ‘Ba81-227’ has been found to have a medium to high level of resistance to melting out and leaf spot both of which are caused by


Drechslera poae


(formerly called


Helminthosporium vagans


); a medium to high level of resistance to summer patch caused by


Magnaporthe poae,


a medium to high level of resistance to stripe smut caused by


Ustilago striiformis


, a medium level of resistance to powdery mildew caused by


Erysiphe graminis


, a medium to high level of resistance to stem rust caused by


Puccinia graminis


, and a medium to high level of resistance to crown rust caused by


Puccinia coronata.






Comparisons of disease incidence of ‘Ba81-227’ as compared with other Kentucky bluegrass varieties in regard to melting out, leaf spot, summer patch, stripe smut, powdery mildew, stem rust, and crown rust are presented in Table 18 as follows:












TABLE 18











A Comparison of Diseases of ‘Ba81-227’ and Other Kentucky Bluegrass






Varieties.























Pow-









Melt-







dery









ing




Leaf




Summer




Stripe




Mil-




Stem




Crown






Variety




Out


1






Spot


2






Patch


3






Smut


4






dew


5






Rust


6






Rust


7











‘Ba81-227’




8.3




6.3




8.2




8.7




5.0




8.8




9.0






‘Abbey’




9.0




4.0




7.0




1.7




2.3




7.3




9.0






‘Allure’




7.0




4.3




7.7




8.0




3.3




5.7




9.0






‘America’




8.3




5.7




8.7




8.0




7.0




7.7




9.0






‘Ascot’




8.7




8.0




5.2




6.7




5.3




5.7




8.0






‘Baron’




9.0




3.7




6.7




1.0




2.0




7.3




9.0






‘Blacksburg’




6.3




7.7




7.8




6.7




4.7




7.7




8.0






‘Challenger’




9.0




5.7




8.2




6.0




2.7




6.7




9.0






‘Classic’




7.0




4.3




8.5




8.3




1.0




6.0




9.0






‘Coventry’




7.3




5.3




7.8




8.3




2.3




6.3




8.7






‘Eclipse’




9.0




7.7




8.7




7.7




6.3




6.7




8.7






‘Envicta’




9.0




3.3




8.0




1.3




2.0




8.0




9.0






‘Glade’




5.0




4.3




8.2




8.7




8.7




6.3




9.0






‘Goldrush’




9.0




4.3




7.0




1.7




2.0




6.3




9.0






‘Haga’




7.7




5.3




8.3




8.3




2.3




7.0




8.7






‘Kenblue’




1.3




1.0




6.7




9.0




6.7




3.7




8.0






‘Limousine’




9.0




5.7




8.5




4.7




5.3




7.0




8.7






‘Midnight’




9.0




8.7




8.0




8.3




1.0




7.7




9.0






‘Misty’




7.3




4.7




6.5




9.0




8.0




5.3




8.7






‘Raven’




9.0




4.3




8.7




1.0




2.7




4.7




9.0






‘Sebring’




9.0




7.7




9.0




7.0




4.0




5.7




9.0






‘Sidekick’




7.0




4.0




8.5




7.3




5.7




6.0




8.7






‘Unique’




8.7




6.3




8.7




8.3




9.0




7.7




9.0






LSD (.05)




1.3




1.8




1.4




1.9




1.1




3.4




1.4











Rating Scale: 1-9; 9 = No Disease.












1


From Pennsylvania












2


From New Jersey












3


From 2 different locations in the U.S.












4


From New Jersey












5


From New Jersey












6


From North Carolina












7


From North Carolina












Claims
  • 1. A new and distinct variety of Kentucky bluegrass plant, as herein illustrated and described.
US Referenced Citations (21)
Number Name Date Kind
PP3150 Pepin et al. May 1972 P
PP3156 Fuchigami et al. May 1972 P
PP3186 Barenbrug et al. May 1972 P
PP4336 Mayer et al. Nov 1978 P
PP6280 Meier et al. Sep 1988 P
PP6537 Meier et al. Jan 1989 P
PP6538 Meier et al. Jan 1989 P
PP6585 Meier et al. Feb 1989 P
PP7831 Meier et al. Mar 1992 P
PP8490 Meier et al. Dec 1993 P
PP9036 Meier et al. Jan 1995 P
PP9209 Meier et al. Jul 1995 P
PP9611 Meier Jul 1996 P
PP9848 Meier et al. Apr 1997 P
PP9977 Meier et al. Jul 1997 P
PP10080 Meier et al. Oct 1997 P
PP10081 Meier et al. Oct 1997 P
PP10384 Meier et al. May 1998 P
PP10925 Meier et al. May 1999 P
PP11520 Meier et al. Sep 2000 P
PP11536 Meier et al. Oct 2000 P