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. 2015 Feb 11;2:15001. doi: 10.1038/hortres.2015.1

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Copyright © 2015 Nanjing Agricultural University

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/

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Composition of each phenotypic class by Dw1 and Dw2 genotype. Trees from both populations (449 trees in total) were visually assessed after 7 years of growth and placed into one of five phenotypic classes, D=dwarf, SD=semi-dwarf, I=intermediate, V=vigorous and VV=very vigorous.