Identifying multiple origins of polyploid taxa: A multilocus study of the hybrid cloak fern (<i>Astrolepis integerrima</i>; Pteridaceae)

Beck, James B.; Allison, James R.; Pryer, Kathleen M.; Windham, Michael D.

doi:10.3732/ajb.1200199

Cited by 24 publications

(23 citation statements)

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“…While frequent gene flow between polyploid lineages and back-crossing to parental taxa can further confound this process, a more easily studied case is offered in apomictic species where the speciation event is more or less frozen in time. One such example is the North American allopolyploid cloak fern, Astrolepis integerrima , which was recently studied by cpDNA sequencing and AFLP analysis [208]. Six relatively localized cpDNA haplotypes were detected, some of which were further divided by AFLP.…”

Section: Present-day Fingerprinting Of Plantsmentioning

confidence: 99%

DNA fingerprinting in botany: past, present, future

2014

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Almost three decades ago Alec Jeffreys published his seminal Nature papers on the use of minisatellite probes for DNA fingerprinting of humans (Jeffreys and colleagues Nature 1985, 314:67–73 and Nature 1985, 316:76–79). The new technology was soon adopted for many other organisms including plants, and when Hilde Nybom, Kurt Weising and Alec Jeffreys first met at the very First International Conference on DNA Fingerprinting in Berne, Switzerland, in 1990, everybody was enthusiastic about the novel method that allowed us for the first time to discriminate between humans, animals, plants and fungi on the individual level using DNA markers. A newsletter coined “Fingerprint News” was launched, T-shirts were sold, and the proceedings of the Berne conference filled a first book on “DNA fingerprinting: approaches and applications”. Four more conferences were about to follow, one on each continent, and Alec Jeffreys of course was invited to all of them. Since these early days, methodologies have undergone a rapid evolution and diversification. A multitude of techniques have been developed, optimized, and eventually abandoned when novel and more efficient and/or more reliable methods appeared. Despite some overlap between the lifetimes of the different technologies, three phases can be defined that coincide with major technological advances. Whereas the first phase of DNA fingerprinting (“the past”) was dominated by restriction fragment analysis in conjunction with Southern blot hybridization, the advent of the PCR in the late 1980s gave way to the development of PCR-based single- or multi-locus profiling techniques in the second phase. Given that many routine applications of plant DNA fingerprinting still rely on PCR-based markers, we here refer to these methods as “DNA fingerprinting in the present”, and include numerous examples in the present review. The beginning of the third phase actually dates back to 2005, when several novel, highly parallel DNA sequencing strategies were developed that increased the throughput over current Sanger sequencing technology 1000-fold and more. High-speed DNA sequencing was soon also exploited for DNA fingerprinting in plants, either in terms of facilitated marker development, or directly in the sense of “genotyping-by-sequencing”. Whereas these novel approaches are applied at an ever increasing rate also in non-model species, they are still far from routine, and we therefore treat them here as “DNA fingerprinting in the future”.

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Section: Present-day Fingerprinting Of Plantsmentioning

confidence: 99%

DNA fingerprinting in botany: past, present, future

2014

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“…Although there is ample genetic evidence of multiple origins across a variety of allopolyploid taxa (e.g. Wyatt et al 1988;Ashton and Abbott 1992;Franzke and Mummenhoff 1999;Segraves et al 1999;Soltis et al 2004;Beck et al 2012;Mavrodiev et al 2015;Servick et al 2015;Vallejo-Marín et al 2015), fewer studies have experimentally compared the interfertility of independently originated populations. For instance, Modliszewski and Willis (2012) investigated the interfertility of populations of independent origin of the allotetraploid Mimulus sookensis (2n = 4x = 56), which is the polyploid derivative of hybrids between M. guttatus and M. nasutus (2n = 28) (Benedict et al 2012).…”

Section: Interfertility Of Mimulus Peregrinus Of Independent Originmentioning

confidence: 99%

“…Wyatt et al 1988;Soltis and Soltis 1991;Ashton and Abbott 1992;Doyle et al 1999;Segraves et al 1999;Beck et al 2012;Modliszewski and Willis 2012;Sampson and Byrne 2012;Mavrodiev et al 2015;Servick et al 2015;Vallejo-Marín et al 2015). Although each instance of polyploid formation may result in limited genetic diversity, mating between independently generated polyploids may introduce genetic variation into the nascent lineage and create new genetic combinations .…”

Section: Introductionmentioning

confidence: 99%

Partial interfertility between independently originated populations of the neo-allopolyploid Mimulus peregrinus

et al. 2017

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The reduction in genetic diversity in polyploid lineages, formed from whole-genome duplication of a few individuals, can affect their long-term evolutionary potential. Because most polyploids originate multiple times, secondary contact and gene exchange among independently formed polyploids can create novel genetic combinations and reduce the severity of genetic bottlenecks. However, independently originated polyploids may be reproductively isolated from each other due to genetic and chromosomal differences predating the polyploidisation event, or evolving subsequently in the dynamic genomes of young polyploid populations. Here we conducted experimental crosses to investigate the phenotype and interfertility between two independently originated populations of the allopolyploid Mimulus peregrinus (Phrymaceae). We found that individuals from the two populations are phenotypically distinct, but that inter-and intrapopulation crosses are not statistically different. Interpopulation crosses produce viable and fertile offspring, although our results suggest the existence of partial reproductive barriers in the form of reduced pollen viability. We found no difference in pollen viability between F1 and F2 generations. In contrast, we detected a reduction in floral and vegetative size, and in the proportion of plants that flowered, between F1 and F2 generations for both intra-and interpopulation crosses. Together, our results indicate that populations of independent origin can partially exchange genes, producing variable offspring, and that the phenotype of M. peregrinus may be unstable in the early generations. Natural selection on genetically based variation may be required for the evolution of more stable and fertile individuals of this nascent allopolyploid.

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“…Recurrent processes of hybridization have been elucidated in several complexes of ferns, for example in Polystichum (Stein 1990), Asplenium (Werth et al 1985, Perrie et al 2010, Hunt et al 2011, Astrolepis D. M. Benham & Windham (Beck et al 2012), Acrorumohra (H. Itô) H. Itô (Chang et al 2009) and Pteris (Chao et al 2012). In some Dryopteris Adans.…”

Section: One Origin Vs Multiple Origins Of Hybrids and Polyploidsmentioning

confidence: 99%

“…Reticulate processes have a particularly high impact in some families, for example, among others, Pteridaceae, Dryopteridaceae, Aspleniaceae and Polypodiaceae. Recent works are studying, among others, the following genera: Cheilanthes ), Astrolepis (Beck et al 2010, Beck et al 2012, Asplenium (Regalado et al 2010, Vicent 2013, Polypodium (Haufler et al 1995, Hunt et al 2011, Polystichum (Barrington 1990, Little & Barrington 2002, Dryopteris (Juslén et al 2011, Sessa et al 2012a, Vandenboschia (Ebihara et al 2005) and Pteris (Chao et al 2012). The pattern of reticulate relationships among members of the Asplenium monanthes L. complex inferred from phylogenetic analyses of nuclear and plastid DNA sequences is presented as an example in Fig.…”

Section: Reticulate Evolutionmentioning

confidence: 99%

Profundizando en la evolución de los helechos: un enfoque mecanicista a los principales conceptos y técnicas de estudio

2014

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Identifying multiple origins of polyploid taxa: A multilocus study of the hybrid cloak fern (Astrolepis integerrima; Pteridaceae)

Abstract: Our results highlight the extreme cryptic genetic diversity and systematic complexity that can underlie a single polyploid taxon.

Cited by 24 publications

References 50 publications

DNA fingerprinting in botany: past, present, future

DNA fingerprinting in botany: past, present, future

Partial interfertility between independently originated populations of the neo-allopolyploid Mimulus peregrinus

Profundizando en la evolución de los helechos: un enfoque mecanicista a los principales conceptos y técnicas de estudio

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