Workshop on New Grass Germplasms
21
3). We are testing and increasing these populations and will release them as a
Selected Class Germplasm in 2003.
Table 1. Percent stand at Yakima Training Center evaluation plots in 1998.
% Stand
Exit 11
Snake A
Snake B
Introduced species
Crested wheatgrass
74
72
Russian wildrye
47
60
Siberian wheatgrass
84
94
Forage kochia
70
25
Intermediate wheatgrass
49
81
Hard fescue
11
Alfalfa
35
Native species
Snake River wheatgrass
66
90
Bluebunch wheatgrass
45
63
Thickspike wheatgrass
38
58
Basin wildrye
4
60
Western wheatgrass
21
40
Indian ricegrass
1
6
Thurbers needlegrass
0
Idaho fescue
13
Globemallow
0
Needle and thread grass
3
10
Sandberg bluegrass
0
35
Squirreltail
2
10
Yarrow
24
28
Forbs
1
3
The SERDP-select Snake River wheatgrass population originated from
`Secar' and two native collections near Yakima, Washington. This grass is
difficult to establish and sensitive to grazing. The SERDP-select population
exhibits increased seedling vigor and seed yield compared to the original popu-
lation (see Table 3). We expect to release a Selected Class Germplasm in 2004.
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