DNA sequence analysis confirms the identity of the intergeneric hybrid Argyrotegium mackayi × Leucogenes leontopodium (Asteraceae: Gnaphalieae)

Abstract

DNA sequencing of the nuclear internal transcribed spacer (ITS) and plastid trnK intron confirms that wild intergeneric hybrids between Argyrotegium mackayi and Leucogenes leontopodium occur in the Tararua Range of the North Island of New Zealand. Both parent species belong to the tribe Gnaphalieae (Asteraceae), already known in New Zealand for numerous intergeneric hybrid combinations. However, an Argyrotegium × Leucogenes hybrid is an especially wide cross within this group. In keeping with the presumed breeding biology of the two parent species, plastid DNA sequences indicate A. mackayi as the maternal parent of the sequenced sample.