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ERDC/CRREL SR-02-2
APPENDIX D. GERMPLASM RELEASES
Registration of `CD-II' crested wheatgrass
Published in Crop Science, 37: 1023 (1997).
K.H. Asay, N.J. Chatterton, K.B. Jensen, R.R-C. Wang, D.A. Johnson, W.H.
Horton, A.J. Palazzo, and S.A. Young
`CD-II' (Reg. no. CV-24, PI 594024) crested wheatgrass is derived from the
cultivar Hycrest, which is a hybrid between induced tetraploid Agropyron crista-
tum (L.) Gaertner and natural tetraploid Agropyron desertorum (Fisch. ex Link)
Schultes. CD-II was developed by a research team at the USDA-ARS Forage and
Range Research Laboratory, Utah State University, Logan, Utah, and released in
cooperation with the Utah Agricultural Experiment Station and the USDA Natu-
ral Resources Conservation Service. This was partially funded under the SERDP
Program.
This new plant is more resilient to training because it has better drought
resistance, has greater growth under cold temperatures, and is easier to establish
than the crested wheatgrass cultivars that are currently on the market. We are
using the germplasm of this new cultivar to identify the genetic markers in plants
with these resilient characteristics. The genetic markers will be used in further
breeding studies.
Registration of RWR-Tetra-1 tetraploid
Published in Crop Science, 38: 1403 (1998).
K.B. Jensen, K.H. Asay, D.A. Johnson, W.H. Horton, A.J. Palazzo, and N.J.
Chatterton
RWR-Tetra-1 Russian wildrye (Psathyrostachys juncea [Fisch.] Nevski)
germplasm (Reg. no. GP-75, PI 599302) was partially funded under the SERDP
Program and developed and released by the USDA-ARS Forage and Range
Research Laboratory in cooperation with the Utah Agricultural Experiment
Station at Utah State University (USU). RWR-Tetra-1 is the first release of
tetraploid Russian wildrye germplasm that includes naturally occurring tetra-
ploid plants in its parentage.
This germplasm was found to have a rapid rate of emergence, which was
significantly greater than for the other named cultivars tested. This rapid emer-
gence will reduce downtime when reseeding training lands. In environments with
450 to 500 mm of annual precipitation, dry matter production was equal to cur-
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