Ancestral chloroplast polymorphism and historical secondary contact in a broad hybrid zone of Aesculus (Sapindaceae).

Cytoplasmic and nuclear markers reveal contrasting patterns of spatial genetic structure in a natural Ipomopsis hybrid zone.

Spatial variation in natural selection may play an important role in determining the genetic structure of hybridizing populations. Previous studies have found that F1 hybrids between naturally hybridizing Ipomopsis aggregata and Ipomopsis tenuituba in central Colorado differ in fitness depending on both genotype and environment: hybrids had higher survival when I. aggregata was the maternal par...

Evaluation of New Urbanism Principles: Hybrid AHP-TOPSIS Multi-Criteria Analysis Framework (Case Study: Neighborhoods of Historical Zone of Shiraz)

A large number of studies show that uncontrolled and unplanned spatial and functional developmentsin old central districts of large and medium-sized Iranian cities in past few decades have resulted in many unpleasanttransformations. Thus, the historic urban fabrics have gradually lost their socio-economic livability and quality and thisissue has led to urban distress, blight and deterioration.T...

Structure of fl oral nectaries in Aesculus hippocastanum L

Representatives of the family Sapindaceae exhibit high morphological diversity of the nectary structure. The present paper shows for the fi rst time the results of micromorphological, anatomical, and ultrastructural analyses of fl oral nectaries in Aesculus hippocastanum. We have also described the forage and signal attractants of these fl owers, which are important for the ecology of pollinati...

Phylogenetic Evaluation of Series Delimitations in Section Palmata (Acer, Aceroideae, Sapindaceae) Based on Sequences of Nuclear and Chloroplast Genes

Patterns of introgression across an expanding hybrid zone: analysing historical patterns of gene flow using nonequilibrium approaches.

Previous studies suggest that the hybrid zone between two taxa in the Piriqueta caroliniana complex in central Florida (south-eastern North America) has recently expanded with hybrids replacing parental genotypes across a broad region of the Florida peninsula. Here I use patterns of genetic disequilibria and levels of differentiation among populations to infer historical patterns of introgressi...