![]() 2009), especially congeneric woody species, which tend to have little variation in floral features and short flowering seasons (Elias 1980). Among them, leaf morphology is important for differentiating plant taxa (Costa et al. There are many phenotypic traits which can be used for the differentiation of taxa, such as leaf morphology, anatomical descriptors, and other structural characters. The high degree of classification accuracy provided by this approach may be exploited to discriminate other problematic species and highlight its utility in plant ecology and evolution studies. GMMs were able to correctly classify individuals from the two species preliminary identified as Q. dentata, and their putative hybrids are correlated with environmental factors, possibly because the variation of leaf morphology is part of the response to different habitats and environmental disturbances. Moreover, we demonstrated that the leaf morphological variations of Q. dentata trees were correctly identified), while putative hybrids between the two species were found to be morphologically intermediate. The two species were efficiently discriminated by the leaf morphology analyses (96.9 and 95.9% of sampled Q. Correlations between environmental and leaf morphology parameters were studied using linear regression analyses. Shapes of 1835 leaves from the 367 trees were analyzed in terms of 13 characters (landmarks) by GMMs. ![]() This grouping served as a priori classification of the trees. aliena populations were genetically assigned to one of the two species or hybrids using Bayesian clustering analysis based on nSSR. Three hundred sixty-seven trees of seven sympatric Q. The aim of this study was to use the morphometric methods to discriminate these sympatric Chinese oaks preliminarily identified from molecular markers. aliena are generally sympatrically distributed in warm temperate forests, and share some leaf morphological characteristics. High genetic and morphological variation in different Quercus species hinder efforts to distinguish them. Geometric morphometric analyses (GMMs) of the leaf shape can distinguish two congeneric oak species Quercus dentata Thunberg and Quercus aliena Blume in sympatric areas.
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