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A cryptic species p...
A cryptic species produced by autopolyploidy and subsequent introgression involving Medicago prostrata (Fabaceae)
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- Eriksson, Jonna S., 1989 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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- Blanco-Pastor, José Luis (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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- Sousa, Filipe de, 1982 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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- Bertrand, Yann (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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- Pfeil, Bernard E., 1975 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- Engelska.
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Ingår i: Molecular Phylogenetics and Evolution. - : Elsevier BV. - 1055-7903 .- 1095-9513. ; 107, s. 367-381
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Although hybridisation through genome duplication is well known, hybridisation without genome duplication (homoploid hybrid speciation, HHS) is not. Few well-documented cases have been reported. A possible instance of HHS in Medicago prostrata Jacq. was suggested previously, based on only two genes and one individual. We tested whether this species was formed through HHS by sampling eight nuclear loci and 22 individuals, with additional individuals from related species, using gene capture and Illumina sequencing. Phylogenetic inference and coalescent simulations were performed to infer the causes of gene tree incongruence. We found no evidence that phylogenetic differences among M. prostrata individuals were the result of HHS. Instead, an autopolyploid origin of tetraploids with introgression from tetraploids of the M. sativa complex is likely. We argue that tetraploid M. prostrata individuals constitute a new species, characterised by a partially non-overlapping distribution and distinctive alleles (from the M. sativa complex). No gene flow from tetraploid to diploid M. prostrata is apparent, suggesting partial reproductive isolation. Thus, speciation via autopolyploidy appears to have been reinforced by introgression. This raises the intriguing possibility that introgressed alleles may be responsible for the increased range exploited by tetraploid M. prostrata with respect to that of the diploids.
Ämnesord
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Biologisk systematik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biological Systematics (hsv//eng)
Nyckelord
- hybridisation; homoploid hybrid speciation; gene capture; next-generation sequencing; coalescent simulations; polyploid speciation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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