Hybridization drives speciation in Gagea (Liliaceae)

Evolutionary events in Lilium (including Nomocharis, Liliaceae) are temporally correlated with orogenies of the Q–T plateau and the Hengduan Mountains

“…Cytological studies indicate L. tigrinum may be allotriploid (Stewart and Bamford, 1943;Moens, 1969), but molecular phylogenetic studies have not been used to verify that the genetic complement of the species is the product of two distinct progenitors. While there is only scant evidence for hybridization in Lilium-Nomocharis, intragenic hybrids are suspected to have played important roles in diversification of other Liliaceous genera including Gagea (Peterson et al, 2009) and Erythronium (Allen, 2001). Thus, hybridization in addition to the documented case in N. gongshanensis may be responsible for gene tree incongruence.…”

Gagea antakiensis, a new species from Southern Anatolia, Turkey and the new finding of Gagea lojaconoi (Liliaceae)

“…The range of variation in morphological characters is limited, making species recognition more difficult. Polyploidy, hybridization, and convergent evolution make species boundaries unclear (Levichev 1990, Gutierrez Esteban et al 2009, Peruzzi et al 2009a, Peruzzi 2008a, 2008b, 2012b, Peterson et al 2009. Their short habit and inconspicuous appearance mean that they have often been ignored by collectors so that there is a shortage of herbarium specimens (Zarrei et al 2011).…”

A report of hybridisation in Hymenachne (Poaceae, Panicoideae) with description of Hymenachne x calamitosa, a new species of hybrid origin from tropical Australia

“…Two of the most commonly used methods are the sequence comparisons of nuclear ribosomal DNA internal transcribed spacer (ITS) regions (Peterson et al 2009, Rauscher et al 2002, Aguilar et al 1999 and Random Amplified Polymorphic DNA (RAPD) assessments (Yüzbaşioğlu et al 2008, Lee et al 2006, González-Rodríguez et al 2004, Ayres et al 1999, Arnold 1993. We adopted both approaches in this study to provide clarity and confidence in the results.…”