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Abstract Detail


Systematics Section / ASPT

Culumber, Catherine [1], Larson, Steven [1], Jones, Tom [1], Miller, Mark [2].

Leymus Hochst. phylogeography of wild origin and cultivated accessions of western North America.

TRITICEAE genus Leymus Hochst. includes about 30 perennial grass species from temperate regions of North America, South America, Europe, and Asia. Leymus wildyres provide an important source of forage and/or habitat for livestock and wildlife, particularly in the Great Basin region of the western US and other harsh semiarid temperate regions of the world. Moreover, Leymus is a close relative of wheat, barley, cultivated rye, and other Triticeae cereals that rank among the world’s most important domesticated crop species. Leymus is also implemented in large-scale restoration efforts in the western US.
The U.S. Department of Agriculture maintains 843 cultivated and natural germplasm sources of Leymus. A phylogeographic assessment is being conducted to determine genetic variability among nine North American species collected in the western United States, British Columbia, and Alberta, Canada. The analysis also includes nine Leymus species of Eurasion origin for genetic comparison. The purpose of this research is to acquire information about genetic identity and geographic provenance within and among Leymus sp. and determine which germplasm sources have the highest levels of genetic diversity in order to help land managers to select and develop plant sources appropriate for large-scale vegetation or fire-rehabilitation efforts. The use of two methods, Amplified Fragment Length Polymorphisms (AFLP) and “barcoding” chloroplast DNA sequences will be described. Preliminary data relating genetic identity and geographic provenance acquired from the comparison of DNA homologies and polymorphisms within and among species will be presented. -DU


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1 - Utah State University, Usda-Ars, Forage And Range Research Laboratory, Logan, Utah, 84322-6300, USA
2 - Utah State University, Department of Biology, College of Science, 5305 Old Main Hill, Logan, Utah, 84322, USA

Keywords:
Leymus
haplotypes
cp DNA barcoding.

Presentation Type: Poster:Posters for Sections
Session: 48-127
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM
Abstract ID:28


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