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. 2019 Mar 12;36(5):875–889. doi: 10.1093/molbev/msz029

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© The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Fig. 5. — Phenotypic variation and premating reproductive isolation between species. (a and b) Principal component analysis (PCA) of six pairs of Oryza rufipogon (blue) and O. nivara (red) populations based on 19 morphological traits recorded in the common garden experiment. All combined samples (a) and separate analyses on each of six paired populations (b) show the clear parallel phenotypic differentiation between species. Number of individuals (O. nivara/O. rufipogon) observed for the paired populations are in parentheses. (c) Frequency distribution of first heading of six population pairs in the common garden experiment. Bars indicate the number of individuals initiating flowering for O. rufipogon (blue) and O. nivara (red). Number of individuals (O. nivara/O. rufipogon) observed for the paired populations are in parentheses.