Both homoploid and polyploid hybrid speciation are commonly considered straightforward
examples of sympatric speciation. Based on 28 studies of homoploid and 34 studies of …

Much of our knowledge of speciation genetics stems from quantitative trait locus (QTL)
studies. However, interpretations of the size and distribution of QTL underlying species …

Sunflowers of the genus Helianthus are models for hybridization research and contain three
of the best-studied examples of homoploid hybrid speciation. To understand a broader …

Correct interpretations of hybridization phenomena rely on accurate methods of detecting
hybrids and estimating genotypic classes. Multilocus molecular data sets have proved to be …

Genetic analyses of reproductive barriers represent one of the few methods by which
theories of speciation can be tested. However, genetic study is often restricted to model …

The origin of new homoploid species via hybridization is theoretically difficult because it
requires the development of reproductive isolation in sympatry. Nonetheless, this mode is …

Numerous DNA regions representing the nuclear and both organellar genomes are now
available for comparative sequencing in plants (see Chapter 1); in addition, morphological …

Genetic architecture may profoundly influence the ability of adaptive traits to spread between
species via introgressive hybridization. Here, we examine the genomic location of …

To obtain introgressed sunflower lines with improved disease resistance, interspecific
crosses were performed with foreign perennial species. We report on several unusual …

Both models and case studies suggest that chromosomal inversions can facilitate adaptation
and speciation in the presence of gene flow by suppressing recombination between locally …