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Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant

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Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant. / Raunsgard, Astrid; Opedal, Øystein H.; Ekrem, Runa K.; Wright, Jonathan; Bolstad, Geir Hysing; Armbruster, Scott; Pélabon, Christophe.

In: Proceedings of the National Academy of Sciences, Vol. 115, No. 45, 06.11.2018, p. 11561-11566.

Research output: Contribution to journalArticlepeer-review

Harvard

Raunsgard, A, Opedal, ØH, Ekrem, RK, Wright, J, Bolstad, GH, Armbruster, S & Pélabon, C 2018, 'Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant', Proceedings of the National Academy of Sciences, vol. 115, no. 45, pp. 11561-11566. https://doi.org/10.1073/pnas.1810979115

APA

Raunsgard, A., Opedal, Ø. H., Ekrem, R. K., Wright, J., Bolstad, G. H., Armbruster, S., & Pélabon, C. (2018). Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant. Proceedings of the National Academy of Sciences, 115(45), 11561-11566. https://doi.org/10.1073/pnas.1810979115

Vancouver

Raunsgard A, Opedal ØH, Ekrem RK, Wright J, Bolstad GH, Armbruster S et al. Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant. Proceedings of the National Academy of Sciences. 2018 Nov 6;115(45):11561-11566. https://doi.org/10.1073/pnas.1810979115

Author

Raunsgard, Astrid ; Opedal, Øystein H. ; Ekrem, Runa K. ; Wright, Jonathan ; Bolstad, Geir Hysing ; Armbruster, Scott ; Pélabon, Christophe. / Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant. In: Proceedings of the National Academy of Sciences. 2018 ; Vol. 115, No. 45. pp. 11561-11566.

Bibtex

@article{9effc109afb74c4fa2af273644d691bc,
title = "Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant",
abstract = "In polyandrous species, fathers benefit from attracting greater maternal investment toward their offspring at the expense of the offspring of other males, while mothers should usually allocate resources equally among offspring. This conflict can lead to an evolutionary arms race between the sexes, manifested through antagonistic genes whose expression in offspring depends upon the parent of origin. The arms race may involve an increase in the strength of maternally versus paternally derived alleles engaged in a {"}tug of war{"} over maternal provisioning or repeated {"}recognition-avoidance{"} coevolution where growth-enhancing paternally derived alleles evolve to escape recognition by maternal genes targeted to suppress their effect. Here, we develop predictions to distinguish between these two mechanisms when considering crosses among populations that have reached different equilibria in this intersexual arms race. We test these predictions using crosses within and among populations of Dalechampia scandens (Euphorbiaceae) that presumably have experienced different intensities of intersexual conflict, as inferred from their historical differences in mating system. In crosses where the paternal population was more outcrossed than the maternal population, hybrid seeds were larger than those normally produced in the maternal population, whereas when the maternal population was more outcrossed, hybrid seeds were smaller than normal. These results confirm the importance of mating systems in determining the intensity of intersexual conflict over maternal investment and provide strong support for a tug-of-war mechanism operating in this conflict. They also yield clear predictions for the fitness consequences of gene flow among populations with different mating histories.",
keywords = "Dalechampia, Interlocus contest evolution, Kinship genomic imprinting, Parent-offspring conflict, Sexual conflict",
author = "Astrid Raunsgard and Opedal, {{\O}ystein H.} and Ekrem, {Runa K.} and Jonathan Wright and Bolstad, {Geir Hysing} and Scott Armbruster and Christophe P{\'e}labon",
year = "2018",
month = nov,
day = "6",
doi = "10.1073/pnas.1810979115",
language = "English",
volume = "115",
pages = "11561--11566",
journal = "Proceedings of the National Academy of Sciences",
issn = "0027-8424",
publisher = "National Academy of Sciences",
number = "45",

}

RIS

TY - JOUR

T1 - Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant

AU - Raunsgard, Astrid

AU - Opedal, Øystein H.

AU - Ekrem, Runa K.

AU - Wright, Jonathan

AU - Bolstad, Geir Hysing

AU - Armbruster, Scott

AU - Pélabon, Christophe

PY - 2018/11/6

Y1 - 2018/11/6

N2 - In polyandrous species, fathers benefit from attracting greater maternal investment toward their offspring at the expense of the offspring of other males, while mothers should usually allocate resources equally among offspring. This conflict can lead to an evolutionary arms race between the sexes, manifested through antagonistic genes whose expression in offspring depends upon the parent of origin. The arms race may involve an increase in the strength of maternally versus paternally derived alleles engaged in a "tug of war" over maternal provisioning or repeated "recognition-avoidance" coevolution where growth-enhancing paternally derived alleles evolve to escape recognition by maternal genes targeted to suppress their effect. Here, we develop predictions to distinguish between these two mechanisms when considering crosses among populations that have reached different equilibria in this intersexual arms race. We test these predictions using crosses within and among populations of Dalechampia scandens (Euphorbiaceae) that presumably have experienced different intensities of intersexual conflict, as inferred from their historical differences in mating system. In crosses where the paternal population was more outcrossed than the maternal population, hybrid seeds were larger than those normally produced in the maternal population, whereas when the maternal population was more outcrossed, hybrid seeds were smaller than normal. These results confirm the importance of mating systems in determining the intensity of intersexual conflict over maternal investment and provide strong support for a tug-of-war mechanism operating in this conflict. They also yield clear predictions for the fitness consequences of gene flow among populations with different mating histories.

AB - In polyandrous species, fathers benefit from attracting greater maternal investment toward their offspring at the expense of the offspring of other males, while mothers should usually allocate resources equally among offspring. This conflict can lead to an evolutionary arms race between the sexes, manifested through antagonistic genes whose expression in offspring depends upon the parent of origin. The arms race may involve an increase in the strength of maternally versus paternally derived alleles engaged in a "tug of war" over maternal provisioning or repeated "recognition-avoidance" coevolution where growth-enhancing paternally derived alleles evolve to escape recognition by maternal genes targeted to suppress their effect. Here, we develop predictions to distinguish between these two mechanisms when considering crosses among populations that have reached different equilibria in this intersexual arms race. We test these predictions using crosses within and among populations of Dalechampia scandens (Euphorbiaceae) that presumably have experienced different intensities of intersexual conflict, as inferred from their historical differences in mating system. In crosses where the paternal population was more outcrossed than the maternal population, hybrid seeds were larger than those normally produced in the maternal population, whereas when the maternal population was more outcrossed, hybrid seeds were smaller than normal. These results confirm the importance of mating systems in determining the intensity of intersexual conflict over maternal investment and provide strong support for a tug-of-war mechanism operating in this conflict. They also yield clear predictions for the fitness consequences of gene flow among populations with different mating histories.

KW - Dalechampia

KW - Interlocus contest evolution

KW - Kinship genomic imprinting

KW - Parent-offspring conflict

KW - Sexual conflict

UR - http://www.scopus.com/inward/record.url?scp=85055494022&partnerID=8YFLogxK

U2 - 10.1073/pnas.1810979115

DO - 10.1073/pnas.1810979115

M3 - Article

VL - 115

SP - 11561

EP - 11566

JO - Proceedings of the National Academy of Sciences

JF - Proceedings of the National Academy of Sciences

SN - 0027-8424

IS - 45

ER -

ID: 11434796