From the Vitis Phylogenomics: Hybridization Intensities from a SNP Array Outperform Genotype Calls:
"American subgenus Vitis species in which
V. palmata occupies the basal position;
2a) V. aestivalis+V. labrusca group together with V. cinerea+V. vulpina; and
2b) V. champinii+V. mustangensis form a clade
that is sister to a clade of (V. monticola (V. girdiana (V. rupestris (V. riparia+V. acerifolia)))).
This
parallels the findings in 'A phylogenetic analysis of the grape genus...' posted here last September. In that paper, monticola was not
in the same clade as girdiana, rupestris, riparia and acerifolia.
Instead, monticola pre-dated the division between lines leading to
girdiana and vinifera clades. This suggests an interesting parallel and
genetic proximity between vinifera and rupestris that I had not noticed
earlier.
I have to admit, the term 'hybridization intensity' puzzled me. I gather it has something to do
with a process of seeing how many short DNA fragments from a reference genome stick to the target DNA sample. Maybe someone will straighten me out on this.
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