Two quantitative trait loci, Dw1 and Dw2, are primarily responsible for rootstock-induced dwarfing in apple.

Hortic Res · 2015 · PMC4595989 · PMID 26504562

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a clear trendno p-value reported

When 449 grafted trees from both populations were compared, a clear trend relating rootstock genotype to phenotypic class was observed.

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