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The Journal of Heredity 1990:81(3):183-188
© 1990 The American Genetic Association 81:183-188

research-article

Evolution of the Avocados as Revealed by DNA Restriction Fragment Variation

G. R. Furnier1, M. P. Cummings2, and M. T. Clegg3

1From the Department of Botany and Plant Sciences, University of California Riverside
2Departments of Forest Resources and Plant Biology, University of Minnesota St. Paul
3Museum of Comparative Zoology Laboratories, Harvard University

Address reprint requests to Glenn Fumier, Department of Forest Resources, University of Minneosta, St. Paul, MN 55108.

Abstract

individuals representing the genus Persea, subgenus Persea were assayed for restriction fragment length polymorphisms in their chloroplast genome, nuclear ribo-somal DNA, and the genes coding for the enzyme cellulase. The subgenus Persea appears to consist of P. schiedeana and a separate taxon containing the remaining species. P. americana does not appear to be a monophyletic group. If P. americana is to be maintained as a species containing var. americana, var. drymifolia, and var. guatemalensis, then our data suggest that it should also contain varieties corresponding to P. floccosa, P. nubigena, and P. steyermarkii. P. americana var. guatemalensis appears to have originated as a hybrid between P. steyermarkiiand P. nubigena. The root-rot-resistant cultivar G755A is a hybrid progeny of P. schiedeana and P. americana var. guatemalensis. The three varieties of P. americana were all distinguished by mutations.


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 J HeredHome page
V. E. T. M. Ashworth and M. T. Clegg
Microsatellite Markers in Avocado (Persea americana Mill.): Genealogical Relationships Among Cultivated Avocado Genotypes
J. Hered., September 1, 2003; 94(5): 407 - 415.
[Abstract] [Full Text] [PDF]


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