DNA of the Ozark Chinquapin
J. AMER. SOC. HORT. SCI. 124(6):666–670. 1999.
Genetic Variation and Population Structure of
Castanea pumila var. ozarkensis
Fenny Dane and Leigh K. Hawkins
Department of Horticulture, Auburn University, AL 36849
Wuhan Institute of Botany, Chinese Academy of Sciences, Wuhan, Hubei 430074, People's Republic of China
GENETIC DIVERSITY IN C. pumila VAR. ozarkensis.
The American Castanea species have not recovered from the devastating effects of fungal colonization by Cryphonectria parasitica, even though many efforts have been made to combat the disease. Population genetic studies conducted on surviving American chestnut populations indicated that the species has a lower level of genetic diversity (He = 0.151) than Chinese (He =0.328) and European (He = 0.317) Castanea species (Huang et al., 1994b, 1998; Villani et al., 1991). The mean genetic diversity of the surviving Ozark chinkapin populations (He = 0.227) was found to be greater than that of the relict American chestnut, even though its range at the present time is limited to the Ozark mountains.