@article {38240,
	title = {Evolution of avocados as revealed by DNA restriction fragment variation},
	journal = {J HeredJ Hered},
	volume = {81},
	year = {1990},
	abstract = {Individuals representing the genus {\i}t Persea, subgenus {\i}t Persea were assayed for restriction fragment length polymorphisms in their chloroplast genome, nuclear ribosomal DNA, and the genes coding for the enzyme cellulase. The subgenus {\i}t Persea appears to consist of {\i}t P. schiedeana and a separate taxon containing the remaining species. {\i}t P. americana does not appear to be a monophyletic group. If {\i}t P. americana is to be maintained as a species containing var. {\i}t americana, var. {\i}t drymifolia, and var. {\i}t guatemalensis, then our data suggest that it should also contain varieties corresponding to {\i}t P. floccosa, {\i}t P. nubigena, and {\i}t P. steyermarkii. {\i}t P. americana var. {\i}t guatemalensis appears to have originated as a hybrid between {\i}t P. steyermarkii and {\i}t P. nubigena. The root-rot-resistant cultivar G755A is a hybrid progeny of {\i}t P. schiedeana and {\i}t P. americana var. guatemalensis. The three varieties of {\i}t P. americana were all distinguished by mutations.},
	author = {Furnier, G. R. and Michael P. Cummings and Clegg, M. T.}
}
