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Low dispersal and ploidy differences in a grass maintain photosynthetic diversity despite gene flow and habitat overlap

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Low dispersal and ploidy differences in a grass maintain photosynthetic diversity despite gene flow and habitat overlap. / Olofsson, J.K.; Curran, E.V.; Nyirenda, F. et al.
In: Molecular Ecology, Vol. 30, No. 9, 31.05.2021, p. 2116-2130.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Olofsson, JK, Curran, EV, Nyirenda, F, Bianconi, ME, Dunning, LT, Milenkovic, V, Sotelo, G, Hidalgo, O, Powell, RF, Lundgren, MR, Leitch, IJ, Nosil, P, Osborne, CP & Christin, P-A 2021, 'Low dispersal and ploidy differences in a grass maintain photosynthetic diversity despite gene flow and habitat overlap', Molecular Ecology, vol. 30, no. 9, pp. 2116-2130. https://doi.org/10.1111/mec.15871

APA

Olofsson, J. K., Curran, E. V., Nyirenda, F., Bianconi, M. E., Dunning, L. T., Milenkovic, V., Sotelo, G., Hidalgo, O., Powell, R. F., Lundgren, M. R., Leitch, I. J., Nosil, P., Osborne, C. P., & Christin, P.-A. (2021). Low dispersal and ploidy differences in a grass maintain photosynthetic diversity despite gene flow and habitat overlap. Molecular Ecology, 30(9), 2116-2130. https://doi.org/10.1111/mec.15871

Vancouver

Olofsson JK, Curran EV, Nyirenda F, Bianconi ME, Dunning LT, Milenkovic V et al. Low dispersal and ploidy differences in a grass maintain photosynthetic diversity despite gene flow and habitat overlap. Molecular Ecology. 2021 May 31;30(9):2116-2130. Epub 2021 Mar 19. doi: 10.1111/mec.15871

Author

Olofsson, J.K. ; Curran, E.V. ; Nyirenda, F. et al. / Low dispersal and ploidy differences in a grass maintain photosynthetic diversity despite gene flow and habitat overlap. In: Molecular Ecology. 2021 ; Vol. 30, No. 9. pp. 2116-2130.

Bibtex

@article{03ac37fd36004df5b1d7cd772340d043,
title = "Low dispersal and ploidy differences in a grass maintain photosynthetic diversity despite gene flow and habitat overlap",
abstract = "Geographical isolation facilitates the emergence of distinct phenotypes within a single species, but reproductive barriers or selection are needed to maintain the polymorphism after secondary contact. Here, we explore the processes that maintain intraspecific variation of C4 photosynthesis, a complex trait that results from the combined action of multiple genes. The grass Alloteropsis semialata includes C4 and non-C4 populations, which have coexisted as a polyploid series for more than 1 million years in the miombo woodlands of Africa. Using population genomics, we show that there is genome-wide divergence for the photosynthetic types, but the current geographical distribution does not reflect a simple habitat displacement scenario as the genetic clusters overlap, being occasionally mixed within a given habitat. Despite evidence of recurrent introgression between non-C4 and C4 groups, in both diploids and polyploids, the distinct genetic lineages retain their identity, potentially because of selection against hybrids. Coupled with strong isolation by distance within each genetic group, this selection created a geographical mosaic of photosynthetic types. Diploid C4 and non-C4 types never grew together, and the C4 type from mixed populations constantly belonged to the hexaploid lineage. By limiting reproductive interactions between photosynthetic types, the ploidy difference probably allows their co-occurrence, reinforcing the functional diversity within this species. Together, these factors enabled the persistence of divergent physiological traits of ecological importance within a single species despite gene flow and habitat overlap. {\textcopyright} 2021 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.",
keywords = "C4 photosynthesis, hybridization, introgression, population genomics, secondary contact, selection",
author = "J.K. Olofsson and E.V. Curran and F. Nyirenda and M.E. Bianconi and L.T. Dunning and V. Milenkovic and G. Sotelo and O. Hidalgo and R.F. Powell and M.R. Lundgren and I.J. Leitch and P. Nosil and C.P. Osborne and P.-A. Christin",
year = "2021",
month = may,
day = "31",
doi = "10.1111/mec.15871",
language = "English",
volume = "30",
pages = "2116--2130",
journal = "Molecular Ecology",
issn = "0962-1083",
publisher = "Blackwell Publishing Ltd",
number = "9",

}

RIS

TY - JOUR

T1 - Low dispersal and ploidy differences in a grass maintain photosynthetic diversity despite gene flow and habitat overlap

AU - Olofsson, J.K.

AU - Curran, E.V.

AU - Nyirenda, F.

AU - Bianconi, M.E.

AU - Dunning, L.T.

AU - Milenkovic, V.

AU - Sotelo, G.

AU - Hidalgo, O.

AU - Powell, R.F.

AU - Lundgren, M.R.

AU - Leitch, I.J.

AU - Nosil, P.

AU - Osborne, C.P.

AU - Christin, P.-A.

PY - 2021/5/31

Y1 - 2021/5/31

N2 - Geographical isolation facilitates the emergence of distinct phenotypes within a single species, but reproductive barriers or selection are needed to maintain the polymorphism after secondary contact. Here, we explore the processes that maintain intraspecific variation of C4 photosynthesis, a complex trait that results from the combined action of multiple genes. The grass Alloteropsis semialata includes C4 and non-C4 populations, which have coexisted as a polyploid series for more than 1 million years in the miombo woodlands of Africa. Using population genomics, we show that there is genome-wide divergence for the photosynthetic types, but the current geographical distribution does not reflect a simple habitat displacement scenario as the genetic clusters overlap, being occasionally mixed within a given habitat. Despite evidence of recurrent introgression between non-C4 and C4 groups, in both diploids and polyploids, the distinct genetic lineages retain their identity, potentially because of selection against hybrids. Coupled with strong isolation by distance within each genetic group, this selection created a geographical mosaic of photosynthetic types. Diploid C4 and non-C4 types never grew together, and the C4 type from mixed populations constantly belonged to the hexaploid lineage. By limiting reproductive interactions between photosynthetic types, the ploidy difference probably allows their co-occurrence, reinforcing the functional diversity within this species. Together, these factors enabled the persistence of divergent physiological traits of ecological importance within a single species despite gene flow and habitat overlap. © 2021 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.

AB - Geographical isolation facilitates the emergence of distinct phenotypes within a single species, but reproductive barriers or selection are needed to maintain the polymorphism after secondary contact. Here, we explore the processes that maintain intraspecific variation of C4 photosynthesis, a complex trait that results from the combined action of multiple genes. The grass Alloteropsis semialata includes C4 and non-C4 populations, which have coexisted as a polyploid series for more than 1 million years in the miombo woodlands of Africa. Using population genomics, we show that there is genome-wide divergence for the photosynthetic types, but the current geographical distribution does not reflect a simple habitat displacement scenario as the genetic clusters overlap, being occasionally mixed within a given habitat. Despite evidence of recurrent introgression between non-C4 and C4 groups, in both diploids and polyploids, the distinct genetic lineages retain their identity, potentially because of selection against hybrids. Coupled with strong isolation by distance within each genetic group, this selection created a geographical mosaic of photosynthetic types. Diploid C4 and non-C4 types never grew together, and the C4 type from mixed populations constantly belonged to the hexaploid lineage. By limiting reproductive interactions between photosynthetic types, the ploidy difference probably allows their co-occurrence, reinforcing the functional diversity within this species. Together, these factors enabled the persistence of divergent physiological traits of ecological importance within a single species despite gene flow and habitat overlap. © 2021 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.

KW - C4 photosynthesis

KW - hybridization

KW - introgression

KW - population genomics

KW - secondary contact

KW - selection

U2 - 10.1111/mec.15871

DO - 10.1111/mec.15871

M3 - Journal article

VL - 30

SP - 2116

EP - 2130

JO - Molecular Ecology

JF - Molecular Ecology

SN - 0962-1083

IS - 9

ER -