First example of hybridisation between two Australian figs (Moraceae)

Wilde, Brendan C.; Rutherford, Susan; Merwe, Marlien van der; Murray, Megan L.; Rossetto, Maurizio

doi:10.1071/sb19048

Cited by 9 publications

(20 citation statements)

References 47 publications

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“…Hybridization followed by successful introgression is strongly suggested to be a relatively frequent occurrence in the Panamanian fig hosts (Jackson et al, 2008; Machado et al, 2005). The processes of hybridization and introgression also appear to be more important for figs in general, as they have been detected in numerous fig systems (Compton, 1990; Compton et al, 2009; Cornille et al, 2012; Van Noort et al, 2013; Wang et al, 2016; Wilde et al, 2020). In particular, cytonuclear discordance between plastid and nuclear genomes provides additional support that hybridization and introgression have played an important role in shaping diversification patterns in Ficus (Bruun‐Lund et al, 2017; Renoult et al, 2009).…”

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

“…The demonstration of pollinator sharing and an evolutionary history of host switching by the pollinators associated with the Panamanian strangler figs (Molbo et al, 2003, 2004; Satler et al, 2019) is consistent with observed widespread hybridization and subsequent introgression across most of the Panamanian figs (Jackson et al, 2008; Machado et al, 2005). Further, evidence suggests that hybridization occurs in figs more generally and that introgression is a potentially important process in the evolutionary history of Ficus (Bruun‐Lund et al, 2017; Compton, 1990; Compton et al, 2009; Cornille et al, 2012; Renoult et al, 2009; Van Noort et al, 2013; Wang et al, 2016; Wang, Zhang, et al, 2021; Wilde et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Genome‐wide sequence data show no evidence of hybridization and introgression among pollinator wasps associated with a community of Panamanian strangler figs

Satler

Herre²,

Heath

et al. 2022

Molecular Ecology

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The specificity of pollinator host choice influences opportunities for reproductive isolation in their host plants. Similarly, host plants can influence opportunities for reproductive isolation in their pollinators. For example, in the fig and fig wasp mutualism, offspring of fig pollinator wasps mate inside the inflorescence that the mothers pollinate. Although often host specific, multiple fig pollinator species are sometimes associated with the same fig species, potentially enabling hybridization between wasp species. Here, we study the 19 pollinator species (Pegoscapus spp.) associated with an entire community of 16 Panamanian strangler fig species (Ficus subgenus Urostigma, section Americanae) to determine whether the previously documented history of pollinator host switching and current host sharing predicts genetic admixture among the pollinator species, as has been observed in their host figs. Specifically, we use genome‐wide ultraconserved element (UCE) loci to estimate phylogenetic relationships and test for hybridization and introgression among the pollinator species. In all cases, we recover well‐delimited pollinator species that contain high interspecific divergence. Even among pairs of pollinator species that currently reproduce within syconia of shared host fig species, we found no evidence of hybridization or introgression. This is in contrast to their host figs, where hybridization and introgression have been detected within this community, and more generally, within figs worldwide. Consistent with general patterns recovered among other obligate pollination mutualisms (e.g. yucca moths and yuccas), our results suggest that while hybridization and introgression are processes operating within the host plants, these processes are relatively unimportant within their associated insect pollinators.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genome‐wide sequence data show no evidence of hybridization and introgression among pollinator wasps associated with a community of Panamanian strangler figs

Satler

Herre²,

Heath

et al. 2022

Molecular Ecology

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“…Other isolating mechanisms such as pollen incompatibility appear to be poorly developed in Ficus (Huang et al 2019), so whenever g wasps species are entering female gs of two more host trees in an area there is the possibility of viable hybrid seed being developed. The extent to which hybrids can mature successfully and can lead to introgression between species is unknown, but mature natural hybrid individuals are known to occur (Wilde et al 2020). Some arti cially generated hybrids appear to be at no reproductive disadvantage in terms of seed production, but male hybrid offspring can be sterile because pollinators cannot develop inside their gs (Ghana et al 2015, but see also Yakushiji 2012), so patterns of introgression may be complex.…”

Section: Discussionmentioning

confidence: 99%

The Extent of Pollinator Sharing Among Fig Trees in Southern China

Liao

Cheng

et al. 2021

Preprint

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Background: The obligate mutualism between fig trees (Ficus, Moraceae) and pollinating fig wasps (Agaonidae) is a model system for studying co-evolution due to its perceived extreme specificity, but recent studies have reported a number of examples of trees pollinated by more than one fig wasp or sharing pollinators with other trees. This makes pollen flow between species and hybridization more likely. We reared pollinator fig wasps from figs of 13 Chinese fig tree species trees and established their identity using genetic methods in order to investigate the extent to which are they were supporting more than one species of pollinator.Results: Our results showed 1) pollinator sharing was frequent among closely-related dioecious species (where pollinator offspring and seeds develop on different trees), but not monoecious species and 2) that where two pollinator species were developing in figs of one host species there was usually one fig wasp that was far rarer than the other. An exception was F. triloba, where its two pollinators were equally abundant. Conclusions: Our results suggest that host expansion events where pollinators reproduce in figs other than those of their usual hosts are not uncommon among fig wasps associated with dioecious hosts. Because closely related trees typically have closely related pollinators that have a very similar appearance, the extent of pollinator-sharing has probably been underestimated. Any pollinators that enter female figs carrying heterospecific pollen could potentially generate hybrid seed, and the extent of hybridization and its significance may also have been underestimated.

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“…None of the sighted specimens were F. coronata. One specimen, CANB 268023, is F. coronulata; MEL 1581926 and MEL 1581933 are possibly F. aculeata x coronulata [33]. Three specimens, BRI AQ1005733, BRI AQ0008071 and MEL 0274275A from northern QLD, are likely F. opposita.…”

Section: Sampling Strategymentioning

confidence: 98%

Allele Surfing and Holocene Expansion of an Australian Fig (Ficus—Moraceae)

et al. 2021

Self Cite

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The creek sandpaper fig of southeastern Australia, Ficus coronata Spin, is culturally significant to Australian traditional owners who made use of the leaves to smooth timber and ate the fruit. The species is thought to have a long history on the continent, with some suggesting a Gondwanan origin. However, distributional patterns and overall ecology suggest a recent expansion across suitable habitats. We used landscape genomic techniques and environmental niche modelling to reconstruct its history and explore whether the species underwent a recent and rapid expansion along the east coast of New South Wales. Genomic analysis of 178 specimens collected from 32 populations throughout the species’ New South Wales distribution revealed a lack of genetic diversity and population structure. Some populations at the species’ southern and western range limits displayed unexpected diversity, which appears to be the result of allele surfing. Field work and genetic evidence suggest a Holocene expansion which may have increased since European colonisation. We also present a novel method for detecting allele surfing—MAHF (minor allele at highest frequency).

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First example of hybridisation between two Australian figs (Moraceae)

Cited by 9 publications

References 47 publications

Genome‐wide sequence data show no evidence of hybridization and introgression among pollinator wasps associated with a community of Panamanian strangler figs

Genome‐wide sequence data show no evidence of hybridization and introgression among pollinator wasps associated with a community of Panamanian strangler figs

The Extent of Pollinator Sharing Among Fig Trees in Southern China

Allele Surfing and Holocene Expansion of an Australian Fig (Ficus—Moraceae)

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