INTERSPECIFIC RELATIONSHIPS AMONG CORYLUS SPECIES
Polymorphisms at the chloroplast DNA (ctDNA) level have been used to draw genetic relationships among five Corylus species. Four Petunia ctDNA clones were used to detect RFLPs, further a PCR method was used to amplify two specific ctDNA oligonucleotides. Restriction endonuclease digestions of the ctDNA amplification products showed no polymorphisms, while classic RFLPs were detected and utilized to estimate a network of genetic relationships and a phylogenetic tree using parsimony methods. C. avellana and C. maxima were grouped together, another group was formed by the Asiatic species C. heterophylla and C. chinensis, while C. colurna was set alone on a single branch. However C. heterophylla resulted less genetically divergent from C. avellana. Results are discussed as a basis for a breeding program.
Malusà, E. (1994). INTERSPECIFIC RELATIONSHIPS AMONG CORYLUS SPECIES. Acta Hortic. 351, 335-340