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Genetics, Vol 120, 1105-1110, Copyright © 1988
INVESTIGATIONS |
Chloroplast DNA Diversity in Populations of Wild and Cultivated Barley
D. B. Neale, M. A. Saghai-Maroof, R. W. Allard, Q. Zhang and R. A. Jorgensen
Present address: USDA Forest Service, Pacific Southwest Forest and Range Experiment Station, Institute of Forest Genetics, P.O. Box 245, Berkeley, California 94701.
Chloroplast DNA (cpDNA) diversity was found within and among populations (245 accessions total) of wild barley, Hordeum vulgare L. ssp. spontaneum Koch from Israel and Iran. Three polymorphic restriction sites (HindIII, EcoRI, BclI) which define three distinct cpDNA lineages were detected. One lineage is common to populations in the Hule Valley and Kinneret of northern Israel, and in Iran. The second lineage is found predominantly in the Lower Jordan Valley and Negev. The distribution of the third lineage is scattered but widespread throughout Israel. Sixty two accessions of cultivated barleys, H. vulgare L., were found, with two exceptions, to belong to just one cpDNA lineage of wild barley, indicating that the cpDNA of cultivated barley is less variable than its wild ancestor. These results demonstrate the need for assessing intraspecific cpDNA variability prior to choosing single accessions for phylogenetic constructions at the species level and higher.
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