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Efforts to assemble North American Accessions
Due to lack of funding, I did not enable to organize the expedition
to collect the accessions of Ae. cylindrica and Ae.
triuncialis var. triuncialis in the United States,
however, fortunately the directory of weed scientists concerning with
Ae. cylindrica was offered from Dr. D.R. Gealey, Washington
State University. I asked them to collect the accessions of Ae.
cylindrica with the passport data, and if possible, Ae.
triuncialis at their locality. In 1994, I also proposed Dr. P.
Westra, who is the leader of the national collection of Ae.
cylindrica, to exchange the accessions reciprocally. In the
consequence, the collection amounted up to 81 (Table
1). Any accessions of Ae. triuncialis var. triuncialis
was not obtained in this 5 years due to limited distribution at
ranges of California and Pennsylvania and lacking of reference.
We did not find any diversity of alpha-amylase isozymes among my
collections (Watanabe et al. 1996), but observed considerable
diversity of morphological and physiological characteristics
(unpublished results). I expect the North American accession would be
utilized broadly and North American Ae. triuncialis would be
assembled in the future.
Acknowledgments
I am grateful to Drs. S. Miller, D. Gealey, P. Westra, J.G.
Waines, P.K. Fay, D.W. Morishita, R. Anderson, J. Koscenly, P.
Stahlman and A.F. Wiese for their kind cooperation to collect
Aegilops cylindrica accessions.
References
Donald WW and Ogg AG Jr (1991) Biology and control of jointed
goatgrass (Aegilops cylindrica), a review. Weed
Technol. 5: 3-17.
Garcia P, Vences FJ, Perez de la Vega M and Allard RW (1989) Allelic
and genotypic composition of ancestral Spanish and colonial
Californian gene pools of Avena barbata: Evolutionary
implications. Genetics 122: 687-694.
Mack RN (1981) The invasion of Bromus tectrum L. into western
North America: an ecological chronicle. Agro-Ecosystems 7:
145-165.
Perez de la Vega M, Garcia P and Allard RW (1991) Multilocus genetic
structure of ancestral Spanish and colonial Californian populations
of Avena barbata. Proc. Natl. Acad. Sci. USA 88:
1202-1206.
van Slageren MW (1994) Wild wheats: a monograph of Aegilops
L. and Amblyopyrum (daub. & Spach) Eig
(Poaceae). Wageningen Agricultural University and International
Center for Agricultural Research in the Dry areas 1-513.
Watanabe N, Matsui K and Furuta Y (1996) Uniformity of the
alpha-amylase isozymes of Aegilops cylindrica Host. introduced
into North America: Comparison with ancestral Eurasian accessions.
Proc. 2nd Int Triticeae Symp. 215-218.
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