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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: A comparison of reproductive isolation between two closely related oak species in zones of recent and ancient secondary contact

Fig. 2

Proportion of hybrid seeds (mean ± SE) under natural and simulated conditions in populations NA and Dlw. The investigation was conducted in population NA in 2012 (a) and in population Dlw in both 2013 (c) and 2014 (b). The * indicates significant difference in the proportion of hybrid seeds under natural and simulated conditions

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