Taxonomy of Hill’s Oak (Quercus ellipsoidalis: Fagaceae): Evidence from AFLP Data

Publication Type:Journal Article
Year of Publication:2008
Authors:A. L. Hipp, Weber J. A.
Journal:Systematic Botany
Volume:33
Pagination:148-158
Date Published:2008
Keywords:AMPLIFIED FRAGMENT LENGTH POLYMORPHISMS (AFLP), HYBRIDIZATION, OAK TAXONOMY, QUERCUS SECTION LOBATAE
Abstract:

Abstract:Quercus ellipsoidalis (Hill’s oak), an endemic of east-central North America, is morphologically similar to Q. coccinea (scarlet oak) and is subsumed into that species in several floristic treatments. This study uses data from more than 250 amplified fragment length polymorphism (AFLP) markers to investigate whether Q. coccinea and Q. ellipsoidalis are genetically distinct from one another. Whereas Q. coccinea and Q. ellipsoidalis separate from one another in all analyses, Q. velutina (black oak) populations collected from the geographic range of both Q. coccinea and Q. ellipsoidalis do not separate out by geographic region. This, combined with the strong differentiation between Q. coccinea and Q. velutina but weak differentiation between Q. ellipsoidalis and Q. velutina, supports the view that Q. coccinea and Q. ellipsoidalis are not simply regional variants of a single taxon. Moreover, while there is no evidence from the molecular data we collected of hybridization between Q. coccinea and Q. ellipsoidalis, the data suggest that there may be gene flow between Q. ellipsoidalis and Q. velutina. A clearer understanding of the relationships among these taxa is essential to understanding the taxonomy of Quercus section Lobate in eastern North America.

URL:http://www.ingentaconnect.com/content/aspt/sb/2008/00000033/00000001/art00017
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith