Patterns of genetic variation suggest a single, ancient origin for the diploid hybrid species Helianthus paradoxus - PubMed (original) (raw)
Patterns of genetic variation suggest a single, ancient origin for the diploid hybrid species Helianthus paradoxus
Mark E Welch et al. Evolution. 2002 Nov.
Abstract
Experimental and comparative evidence implies that homoploid hybrid speciation is a reproducible process, mediated in part by ecological selection. Here, molecular data from the chloroplast genome and 17 nuclear microsatellite loci were employed to determine whether a well-documented homoploid hybrid species, Helianthus paradoxus, has arisen multiple times. Helianthus paradoxus is ecologically divergent from its parental species, and has a disjunct geographic distribution consistent with multiple origins. The molecular data, however, strongly support a single hybrid origin. First, all sampled populations of H. paradoxus are fixed for a single chloroplast DNA (cpDNA) haplotype, whereas local populations of both parental species, H. annuus and H. petiolaris, have multiple cpDNA haplotypes. Second, H. paradoxus populations form a single, well-supported clade (99.8% bootstrap support) in a neighbor-joining tree based on microsatellite allele frequencies. The microsatellite data also tentatively place the origin of H. paradoxus between 75,000 years and 208,000 years before present, indicating that anthropogenic disturbance likely did not play a role in the formation of this species. Finally, the genetic structure of this species is not consistent with passive riparian dispersal, which has been suggested for other wetland plant species, but may be explained by dispersal mechanisms implicated for H. annuus, such as large migratory mammals.
Similar articles
- Likely multiple origins of a diploid hybrid sunflower species.
Schwarzbach AE, Rieseberg LH. Schwarzbach AE, et al. Mol Ecol. 2002 Sep;11(9):1703-15. doi: 10.1046/j.1365-294x.2002.01557.x. Mol Ecol. 2002. PMID: 12207721 - The origin of ecological divergence in Helianthus paradoxus (Asteraceae): selection on transgressive characters in a novel hybrid habitat.
Lexer C, Welch ME, Raymond O, Rieseberg LH. Lexer C, et al. Evolution. 2003 Sep;57(9):1989-2000. doi: 10.1111/j.0014-3820.2003.tb00379.x. Evolution. 2003. PMID: 14575321 - MOLECULAR TESTS OF THE HYPOTHESIZED HYBRID ORIGIN OF TWO DIPLOID HELIANTHUS SPECIES (ASTERACEAE).
Rieseberg LH, Carter R, Zona S. Rieseberg LH, et al. Evolution. 1990 Sep;44(6):1498-1511. doi: 10.1111/j.1558-5646.1990.tb03841.x. Evolution. 1990. PMID: 28564296 - Microsatellite signature of ecological selection for salt tolerance in a wild sunflower hybrid species, Helianthus paradoxus.
Edelist C, Lexer C, Dillmann C, Sicard D, Rieseberg LH. Edelist C, et al. Mol Ecol. 2006 Dec;15(14):4623-34. doi: 10.1111/j.1365-294X.2006.03112.x. Mol Ecol. 2006. PMID: 17107488 Free PMC article. - The ecological genetics of homoploid hybrid speciation.
Gross BL, Rieseberg LH. Gross BL, et al. J Hered. 2005 May-Jun;96(3):241-52. doi: 10.1093/jhered/esi026. Epub 2004 Dec 23. J Hered. 2005. PMID: 15618301 Free PMC article. Review.
Cited by
- The Role of Interspecific Hybridisation in Adaptation and Speciation: Insights From Studies in Senecio.
Wong ELY, Hiscock SJ, Filatov DA. Wong ELY, et al. Front Plant Sci. 2022 Jun 23;13:907363. doi: 10.3389/fpls.2022.907363. eCollection 2022. Front Plant Sci. 2022. PMID: 35812981 Free PMC article. Review. - Genomic evidence for a hybrid origin of the yeast opportunistic pathogen Candida albicans.
Mixão V, Gabaldón T. Mixão V, et al. BMC Biol. 2020 May 6;18(1):48. doi: 10.1186/s12915-020-00776-6. BMC Biol. 2020. PMID: 32375762 Free PMC article. - Hybridization and emergence of virulence in opportunistic human yeast pathogens.
Mixão V, Gabaldón T. Mixão V, et al. Yeast. 2018 Jan;35(1):5-20. doi: 10.1002/yea.3242. Epub 2017 Sep 14. Yeast. 2018. PMID: 28681409 Free PMC article. - Multiple and asymmetrical origin of polyploid dog rose hybrids (Rosa L. sect. Caninae (DC.) Ser.) involving unreduced gametes.
Herklotz V, Ritz CM. Herklotz V, et al. Ann Bot. 2017 Aug 1;120(2):209-220. doi: 10.1093/aob/mcw217. Ann Bot. 2017. PMID: 28028016 Free PMC article. - Asymmetrical gene flow in a hybrid zone of Hawaiian Schiedea (Caryophyllaceae) species with contrasting mating systems.
Wallace LE, Culley TM, Weller SG, Sakai AK, Kuenzi A, Roy T, Wagner WL, Nepokroeff M. Wallace LE, et al. PLoS One. 2011;6(9):e24845. doi: 10.1371/journal.pone.0024845. Epub 2011 Sep 19. PLoS One. 2011. PMID: 21949765 Free PMC article.
Publication types
MeSH terms
LinkOut - more resources
Full Text Sources