Fine-scale spatial genetic structure of two red oak species, Quercus rubra and Quercus ellipsoidalis

Evidence for environment‐dependent introgression of adaptive genes between two red oak species with different drought adaptations

“…Low interspecific differentiation at other genic and nuclear microsatellites (Lind‐Riehl and Gailing, 2014) and sharing of geographically restricted chloroplast haplotypes between species (Zhang et al, 2015) were indicative of recurrent interspecific gene flow. We recognize that low interspecific differentiation could also reflect shared ancestral variation between species (Muir and Schlötterer, 2005).…”

Oaks: an evolutionary success story

“…If we restrict the analysis to diversity inventories based on microsatellites, then a general picture of high heterozygosity (> 0.7) with numerous rare alleles emerges. This is the case not only for species with a broad distribution ( Q. macrocarpa (Craft & Ashley, ); Q. rubra (Lind‐Riehl & Gailing, ; Alexander & Woeste, ); Quercus candicans, Quercus castanea and Quercus crassifolia (Oyama et al , ); Q. petraea and Q. robur (Mariette et al , ; Neophytou et al , ); Q. acutissima (Zhang et al , ); and Quercus mongolica (Zeng et al , )), but also for species with much narrower ranges ( Quercus hinckelyi (Backs et al , ); Quercus engelmannii (Ortego et al , ); Quercus tomentella (Ashley et al , ); Quercus alnifolia (Neophytou et al , ); and Quercus austrocochinchinensis (An et al , )). Whole‐genome sequencing results have recently confirmed marker estimates, highlighting a strikingly high degree of nucleotide diversity (π values of 0.0114 (Plomion et al , ), and one SNP every 23 bp (Leroy et al , ).…”

Effects of zoochory on the spatial genetic structure of plant populations

“…The list of additional factors that might potentially influence SGS in the surveyed studies, but were present in too few studies to include in the analysis, included fruit availability and plant distribution (Bizoux et al., ; Trapnell et al., ), management situation of plant populations (Lind‐Riehl & Gailing, ), habitat fragmentation (Vieira, Fajardo, de Souza, Reis, & de Carvalho, ; Wang, Compton, & Chen, ), urbanization level of study site (Wang et al., ), specific microhabitat requirements limiting germination success (Chung et al., ; Heer et al., ) and plant life history, such as masting events or high fruiting yields (Lind‐Riehl & Gailing, ; Vieira et al., ), clonality (Dodd, Mayer, Nettel, & Afzal‐Rafii, ) or plant life form (Heer et al., ). Many of these factors influence directly or indirectly foraging behaviour of the seed dispersal vectors.…”