Loading content, please wait..
loading..
Logo
Version 3.22
or
Publication Type J
Authors Cattell, M. V. and S. A. Karl
Title Genetics and morphology in a Borrichia frutescens and B. arborescens (Asteraceae) hybrid zone
Source American Journal of Botany
Author Keywords Asteraceae chloroplast DNA cytonuclear disequilibrium Florida USA hybrid zone single-copy nuclear DNA cytonuclear disequilibria reticulate evolution noncoding regions universal primers louisiana irises chloroplast dna hybridization introgression populations speciation
Abstract Interspecific plant hybridization is a common and evolutionarily important phenomenon. Here, the results of it study of hybridization in the Florida Keys between two species of sea oxeye daisy, Borrichia frutescens and B. arborescens, are reported. Nuclear and chloroplast genetic loci, log-likelihood assignment tests, and maximum likelihood estimates of genealogical class frequencies were used to identify, hybrid and parent genotypes, to investigate the utility of leaf and flower morphology for hybrid identification, and to study symmetry and degree of introgression between the species. Genetic analyses confirmed the identity of the hybrid and parent plants that were used for the morphological studies. Together, leaf and flower morphology can be used to identify hybrid and parental types with moderate accuracy (4% error rate). Population genetic analyses indicate that, in spite of a significant level of hybridization, pure B. frutescens and B. arborescens are persisting in the hybrid zone. Of the nonparentals, about 18% appear to be F-1 hybrids, over 50% F-2 hybrids. and the remainder backcrossed individuals but only with the B. frutescens parent. It is postulated that the hybrid zone in the Florida Keys is being maintained by a combination of positive assortative raining and clonal reproduction.
Publication Date Nov
Year Published 2004
Volume 91
Issue 11
Beginning Page 1757-1766
Unique Article Identifier ISI:000225242500002
Plants associated with this reference

LEGAL NOTICES — This website is protected by Copyright © The University of Sussex, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. The eHALOPH database is protected by Database Right and Copyright © The University of Sussex and other contributors, 2006, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. This database is based on an earlier work by James Aronson.
THIS WEBSITE AND THIS DATABASE ARE PROVIDED ON AN "AS IS" BASIS, AND YOU USE THEM AND RELY ON THEM AT YOUR OWN RISK.

Contact email: halophytes@sussex.ac.uk
Credits – Tim Flowers, Joaquim Santos, Moritz Jahns, Brian Warburton, Peter Reed