Abstract
Leyland cypress (×Cupressocyparis leylandii) has been regarded as an intergeneric hybrid between Monterey cypress (Cupressus macrocarpa) and Alaska cypress (Chamaecyparis nootkatensis) in the Cupressaceae. Each partial sequence of the 18S-rDNA from nuclear and therbcL from chloroplast DNA genomes was determined using above three species. At the 59th site from the 5′ end of the 152 bp of the determined 18S-rDNA sequence, one base difference was identified between Monterey cypress (T) and Alaska cypress (A). However, Leyland cypress showed either nucleotide A or T at this site. Since nuclear DNA is inherited by biparental mode, this result shows genetic evidence that the nucleic genome of Leyland cypress originates from Monterey cypress and Alaska cypress and that this species is of hybrid origin.
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Yamaguchi, N., Shiraishi, S., Sasaki, Y. et al. Molecular evidence of the hybrid origins of leyland cypress (×Cupressocyparis leylandii). J For Res 5, 35–38 (2000). https://doi.org/10.1007/BF02762761
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DOI: https://doi.org/10.1007/BF02762761