Details for: PI 618816, Leymus hybr., Leymus hybrid-1


Summary Data
Taxonomy:
Leymus hybr.
Top Name:
Leymus hybrid-1
Origin:
Developed – Utah, United States
Received by NPGS:
30 Apr 2001
Improvement Status:
Breeding material
Form Received:
Seed
Life Form:
Perennial
Life Cycle:
Perennial
Availability
This accession is not available. Contact site for status.
Seed available for distribution is a limited resource. The quantity of seed distributed is hopefully sufficient to conduct the intended research. If additional seed is required, the recipient is urged to grow and reproduce the seed. Repeated requests for seed of the same accession will not be honored.
  
There are no images for this accession.

Core Passport Data
Taxonomy:
Leymus hybr.
Top Name:
Leymus hybrid-1
Origin:
Developed – Utah, United States
Received by NPGS:
30 Apr 2001
Improvement Status:
Breeding material
Form Received:
Seed
Life Form:
Perennial
Life Cycle:
Perennial
Source History
Accession Names and Identifiers
Leymus hybrid-1
Type: Institute identifier

Narrative
Three way cross combining genetic material from Altai wildrye (Leymus angustus), Great Basin wildrye (L. cinereus), and mammoth wildrye (L. racemosus). Cross pollinating and behaves meiotically as a segmental autoallopolyploid with multiple copies of the Ns and Xsm genomes from Psathryostachys and an unknown diploid progenitor. In environments where annual precipitation ranges from 400-500 mm, dry matter production exceeded the current Altai wildrye cultivars at mid August by 36% and at late November by 42%. Forage quality lower than the check cultivars throughout the year. However, increased dry matter yields more than compensated in available nutrient levels. Should be utilized as a standing forage for winter grazing.
Leymus hybr.
Genus:
Leymus
Family:
Poaceae (alt. Gramineae)
Subfamily:
Pooideae
Tribe:
Triticeae
Nomen number:

310513
Comment:
interim designation used in GRIN for Leymus hybrids which lack an acceptable binomial
Verified:
09/23/1986 by ARS Systematic Botanists.
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
Common names
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Citations
Pedigree
Description:
Developed from eight cycles of recurrent selection within a segmental autoalloploid population that originated from intercrossing three hybrids. Population 1 was a cross between L. racemosus (PI 313965) x L. angustus (PI 314682) which produced a 70 chromosome hybrid that resulted from an unreduced L. racemosus egg, n=28, fertilized by a reduced L. angustus gamete, n=42. Population II was a 98 chromosome hybrid that originated from a cross that involved an unreduced L. cinereus (PI 286809) gamete (n=56) and reduced L. angustus (PI 314672 and 314682) pollen (n=42). Population III was a backcross of the L. racemosus x L. angustus hybrid to L. angustus.
Intellectual Property Rights
Crop Science Registration. GP-82, OTHER GRASSES. Issued: 01 Mar 2002.
  • Jensen, K. B., K. H. Asay, N. J. Chatterton, & D. R. Dewey. 2002. Leymus Hybrid Wildrye Germplasm. Crop Sci. (Madison) 42(2):675.

Observations

Phenotype Data

CategoryDescriptorDescriptionValueSample SizeStudyInventoryAvailability
MORPHOLOGYSeed weight 100Weight of 100 seeds in grams.0.757 GRASS.SEEDWEIGHT.WRPISPI 618816 2001o SDNot Available