Abstract
Forty-nine morpho-nut characters were measured over the period 1994–1996 to study the relationships of 23 accessions of chestnut representing five lines of known chestnut species and 18 lines of New Zealand (NZ) chestnut selections. The study was prompted by the lack of knowledge of the parentage of NZ chestnut selections. These are presumed to be hybrids resulting from uncontrolled open pollination of the introduced chestnut species in NZ, most especially, Castanea sativa (European species) and C. crenata (Japanese species). Data were analysed by Principal Component Analysis (PCA) and the Unweighted Pair Group Mean (UPGMA) method of cluster analysis. Thirty-one characters out of the 49 used in the study accounted for the major variations among accessions. Results from both methods agreed and showed the separation of the chestnut species and NZ selections along geographic lines. The South Island selections were found to be mostly C. sativa-like while the North Island selections were mostly C. crenata-like. The discrimination between groups and description of differences between groups were more strongly marked from the PCA than in the UPGMA cluster analysis.
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Oraguzie, N.C., McNeil, D.L., Klinac, D.J. et al. Relationships of chestnut species and New Zealand chestnut selections using morpho-nut characters. Euphytica 99, 27–33 (1998). https://doi.org/10.1023/A:1018356931080
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DOI: https://doi.org/10.1023/A:1018356931080