Abstract Knowledge of the nature and extent of karyotypic differences between species
provides insight into the evolutionary history of the genomes in question and, in the case of …

Comparative genetic linkage maps provide a powerful tool for the study of karyotypic
evolution. We constructed a joint SSR/RAPD genetic linkage map of the Helianthus …

Silverleaf sunflower (Helianthus argophyllus Torrey and Gray) has been an important source
of favorable alleles for broadening genetic diversity and enhancing agriculturally important …

PREMISE: Wild sunflowers harbor considerable genetic diversity and are a major resource
for improvement of the cultivated sunflower, Helianthus annuus. The Helianthus genus is …

Helianthus is an economically important and genetically diverse genus, containing both
evolutionary model species and cultivated species. Genetic variation within this genus has …

While speciation can be found in the presence of gene flow, it is not clear what impact this
gene flow has on genome-and range-wide patterns of differentiation. Here we examine …

Understanding the genetic mechanisms of speciation and basis of species differences is
among the most important challenges in evolutionary biology. Two questions of particular …

The origins of geographic races in wide‐ranging species are poorly understood. In Texas,
the texanus subspecies of Helianthus annuus has long been thought to have acquired its …

Although the sexual transfer of genetic material between species (ie introgression) has been
documented in many groups of plants and animals, genome‐wide patterns of introgression …

The origin of new diploid, or homoploid, hybrid species is associated with rapid genomic
restructuring in the hybrid neospecies. This mode of speciation has been best characterized …