Kentucky bluegrass designated ‘Ba75-173’

Details Kentucky bluegrass designated ‘Ba75-173’ Kentucky bluegrass designated ‘Ba75-173’

2000-05-24

2001-07-10

Para, Annette H. (Department: 1661)

Plants

Rose

Climber

Plant Patent

active

PP011987

ABSTRACT:

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 ‘Ba75-173’ 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. Nos. 6,537 and 6,538, issued on Jan. 17, 1989; U.S. Plant Plant. 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. 9,209, 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, ussued May 5, 1998; U.S. Plant Pat. No. 10,925, issued May 25, 1999; and U.S. Plant Pat. No. 11,536, filed Feb. 27, 1998, U.S. Plant Pat. No. 11,520, filed Jul. 22, 1998 as well as U.S. Plant Pat. No. 11,647, filed Aug. 17, 1999.
SUMMARY OF THE VARIETY
‘Ba75-173’ plant material originated from a single plant that was progeny resulting from crossing ‘Nugget’ Kentucky Bluegrass, as the seed parent, with ‘Ba70-46’, an unreleased, unpatented Kentucky Bluegrass plant grown and maintained in a plant nursery in Marysville, Ohio, as the pollen parent. As a result of this breeding, a distinct variety was produced and asexually propagated by rhizomes, tillers and disseminules. The highly apomictic seed of ‘Ba75-173’ 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 ‘Ba75-173’ has been found to be stable. Asexual production of ‘Ba75-173’ 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 ‘Ba75-173’ is approximately 98.4% (plus or minus 2.8%). The apomixis level was determined by examining seedling characteristics of approximately 100 to 150 seedlings from different crop years in a growth chamber and any seedling with one or more characteristics different from the other ‘Ba75-173’ seedlings was classified as not being of apomictic origin.
‘Ba75-173’ has a number of highly desirable characteristics, including a high level of resistance to Drechslera spp that causes melting out; a medium to high level of resistance to
Magnaporthe poae
that causes summer patch, a medium to high level of resistance to
Puccinia graminis
that causes stem rust, a medium to high level of resistance to
Sclerotinia homeocarpia
that causes dollarspot, and a medium to high level of resistance to Typhula spp that causes grey snowmold. ‘Ba75-173’ has an attractive leafy turf type and a medium to dark green color which can be maintained throughout the entire growing season. ‘Ba75-173’ demonstrates good fall color and good winter color under mild winter conditions.
‘Ba75-173’ 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. ‘Ba75-173’ has a high seed yield potential in the bluegrass seed production region of the northwestern United States.
In comparison with other Kentucky bluegrass varieties, ‘Ba75-173’ has a larger seed (longer and wider) with a lower number of seeds per pound. The panicle of ‘Ba75-173’ Kentucky bluegrass is longer and has a higher number branches in the lowest whorl than other Kentucky bluegrasses. The peduncle is shorter and thicker, and the culm is longer than other Kentucky bluegrass varieties. It has a flag leaf that is wider and longer with a longer ligule that has more hairs when compared to other Kentucky bluegrasses.


REFERENCES:
patent: P.P. 3150 (1972-05-01), Pepin et al.
patent: P.P. 3156 (1972-05-01), Fuchigami et al.
patent: P.P. 3186 (1972-05-01), Barenbrug et al.
patent: P.P. 4336 (1978-11-01), Mayer et al.
patent: P.P. 6280 (1988-09-01), Meier et al.
patent: P.P. 6537 (1989-01-01), Meier et al.
patent: P.P. 6538 (1989-01-01), Meier et al.
patent: P.P. 6585 (1989-02-01), Meier et al.
patent: P.P. 7831 (1992-03-01), Meier et al.
patent: P.P. 8490 (1993-12-01), Meier et al.
patent: P.P. 9036 (1995-01-01), Meier et al.
patent: P.P. 9209 (1995-07-01), Meier et al.
patent: P.P. 9611 (1996-07-01), Meier
patent: P.P. 9848 (1997-04-01), Meier et al.
patent: P.P. 9977 (1997-07-01), Meier et al.
patent: P.P. 10080 (1997-10-01), Meier et al.
patent: P.P. 10081 (1997-10-01), Meier et al.
patent: P.P. 10384 (1998-05-01), Meier et al.

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