2020
DOI: 10.1007/s13127-020-00456-x
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Morphological characters and SNP markers suggest hybridization and introgression in sympatric populations of the pleurocarpous mosses Homalothecium lutescens and H. sericeum

Abstract: Hybridization in bryophytes involves a fusion of gametes produced by haploid parental gametophytes of different species. The primary hybrid is thus the short-lived diploid sporophyte, which soon undergoes meiosis prior to the formation of large amounts of haploid spores. We compared morphology of gametophytes (branch leaves) and sporophytes (capsule inclination) from sympatric populations and allopatric populations of H. lutescens and H. sericeum. In addition, we used transcriptome data to select 85 nuclear SN… Show more

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“…The lack of concordance between the morphology‐based systematic concepts and the phylogeny based on our phylogenomic data indicates that gametophyte morphology is evolutionarily highly labile within the Hypnales. Gametophytic traits that are taxonomically useful in other lineages of mosses are highly homoplasious in this group, due to shifts in habitats following speciation (Huttunen and Ignatov, 2010), or hybridization (Sawangproh et al, 2020), or even highly variable along ecological gradients (Spitale and Petraglia, 2010), or potentially due to incomplete lineage sorting. Remarkably, the homoplasy we observed may even span across subclasses.…”
Section: Resultsmentioning
confidence: 99%
“…The lack of concordance between the morphology‐based systematic concepts and the phylogeny based on our phylogenomic data indicates that gametophyte morphology is evolutionarily highly labile within the Hypnales. Gametophytic traits that are taxonomically useful in other lineages of mosses are highly homoplasious in this group, due to shifts in habitats following speciation (Huttunen and Ignatov, 2010), or hybridization (Sawangproh et al, 2020), or even highly variable along ecological gradients (Spitale and Petraglia, 2010), or potentially due to incomplete lineage sorting. Remarkably, the homoplasy we observed may even span across subclasses.…”
Section: Resultsmentioning
confidence: 99%