Genetic Diversity and Population Structure in the Outcrossing Populations of Equisetum arvense and E. hyemale (Equisetaceae)

Korpelainen, Helena; Kolkkala, Mikko

doi:10.2307/2445954

Cited by 11 publications

(11 citation statements)

References 14 publications

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“…Over 50% of all flowering plant species, for instance, self-fertilize at least occasionally . Hermaphroditism also occurs commonly in algae, lower plants, and in a variety of animals, although group-wide estimates of rates of self-fertilization of these group have not been produced (but see , and Korpelainen and Kolkkala 1996 for estimates of self-fertilization in Equisetum spp. Hermaphroditism also occurs commonly in algae, lower plants, and in a variety of animals, although group-wide estimates of rates of self-fertilization of these group have not been produced (but see , and Korpelainen and Kolkkala 1996 for estimates of self-fertilization in Equisetum spp.…”

Section: Introductionmentioning

confidence: 99%

“…Among hermaphroditic angiosperms, 35-84% show some level of self-compatibility (Jarne and Charlesworth 1993). Hermaphroditism also occurs commonly in algae, lower plants, and in a variety of animals, although group-wide estimates of rates of self-fertilization of these group have not been produced (but see , and Korpelainen and Kolkkala 1996 for estimates of self-fertilization in Equisetum spp. ).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Self-Fertilization in the Giant Kelp, Macrocystis Pyrifera

Raimondi

Reed

Gaylord

et al. 2004

Ecology

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The costs of self-fertilization were evaluated for the giant kelp, Macrocystis pyrifera. Macrocystis, like other kelps, has a biphasic life history in which the dispersal stage is the 1N spore generation. Once spores settle, they grow into sedentary and microscopic male or female gametophytes, which produce sperm and eggs. Fertilization ensues, and the resultant 2N sporophyte, the spore-producing form, grows rapidly to a height of up to 25 m. Based on previous empirical studies and modeling field surveys, the potential for self-fertilization is expected to be high, largely due to the shape and extent of spore dispersal distributions. The costs of self-fertilization were assessed with laboratory and field experiments over the entire life history of the sporophyte stage. There was no evidence for self-incompatibility, and fitness was dramatically lower in selfed compared to outcrossed individuals. In addition, there was evidence that costs were more severe under intraspecific competition with outcrossed individuals. The demonstrated severity of the consequences of self-fertilization suggests a species that typically outcrosses (at least under the assumption that costs result from rare recessive deleterious alleles). However, costs were more pronounced in later life history phases, suggesting routine self-fertilization. One implication of significant levels of self-fertilization in Macrocystis is a sort of inbreeding-mediated localized population senescence, leading to striking oscillations in populations, a pattern seen in many Californian kelp beds.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Self-Fertilization in the Giant Kelp, Macrocystis Pyrifera

Raimondi

Reed

Gaylord

et al. 2004

Ecology

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“…The high level of interpopulation divergence in E. arvense and E. hyemale was explained in terms of the life history of Equisetum , i.e. the inefficiency of spore germination and gametophyte reproduction in noncolonizing situations (Korpelainen & Kolkkala 1996). In H. palmata it was accounted for by the ability of this species to inbreed and by founder effects (Ranker 1992), and in S. pallida and S. cyatheoides it was attributed to spatial heterogeneity of habitat (Ranker et al .…”

Section: Introductionmentioning

confidence: 99%

Diversity, genetic structure and evidence of outcrossing in British populations of the rock fern Adiantum capillus‐veneris using microsatellites

et al. 2001

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Microsatellites were isolated and a marker system was developed in the fern Adiantum capillus-veneris. Polymorphic markers were then used to study the genetic diversity and structure of populations within the UK and Ireland where this species grows at the northern edge of its range, requiring a specific rock habitat and limited to a few scattered populations. Three dinucleotide loci detected a high level of diversity (23 alleles and 28 multilocus genotypes) across the UK and Ireland, with nearly all variation partitioned among rather than within populations. Of 17 populations represented by multiple samples, all except four were monomorphic. Heterozygosity was detected in three populations, all within Glamorgan, Wales (UK), showing evidence of outcrossing. We make inferences on the factors determining the observed levels and patterns of genetic variation and the possible evolutionary history of the populations.

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“…However, in controlled growth studies to examine reproductive strategies in homosporous ferns, only a few species had high intragametophytic selfing rates (e.g., Crist and Farrar, 1983;Korpelainen, 1996Korpelainen, , 1997. The majority of studied fern species reproduce through intergametophytic crossing (Hedrick, 1987;Soltis and Soltis, 1992;Korpelainen and Kolkkala, 1996;Hooper and Haufler, 1997). Mixed mating has only been observed in a few species, including Onoclea sensibilis (Klekowski, 1982) and Dryopteris expansa (Soltis and Soltis, 1987).…”

mentioning

confidence: 99%

The reproductive biology of the invasive ferns Lygodium microphyllum and L. japonicum (Schizaeaceae): implications for invasive potential

Lott

Volin

Pemberton

et al. 2003

American J of Botany

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The effect of culture system and population source on sexual expression and sporophyte production was examined for two invasive fern species in Florida, USA, Lygodium microphyllum and L. japonicum (Schizaeaceae). Both species are currently spreading through Florida. Long-distance dispersal of ferns is thought to rely on successful intragametophytic selfing. Given the rate of spread observed in both Lygodium species, we hypothesized that both species are capable of intragametophytic selfing. To test this hypothesis, gametophytes of both species were grown in vitro as isolates, pairs, and groups. Both species were capable of intragametophytic selfing; 78% of L. microphyllum isolates produced sporophytes and over 90% of the L. japonicum isolates produced sporophytes. Lygodium microphyllum also displayed the ability to reproduce via intergametophytic crossing, facilitated by an antheridiogen pheromone. Sporophyte production was rapid across mating systems for both species, an advantage in Florida's wet and dry seasonal cycles. The high intragametophytic selfing rate achieved by both species has likely facilitated their ability to colonize and spread through Florida. The mixed mating system observed in L. microphyllum appears to give this species the ability to invade distant habitats and then adapt to local conditions.

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Genetic Diversity and Population Structure in the Outcrossing Populations of Equisetum arvense and E. hyemale (Equisetaceae)

Cited by 11 publications

References 14 publications

Effects of Self-Fertilization in the Giant Kelp, Macrocystis Pyrifera

Effects of Self-Fertilization in the Giant Kelp, Macrocystis Pyrifera

Diversity, genetic structure and evidence of outcrossing in British populations of the rock fern Adiantum capillus‐veneris using microsatellites

The reproductive biology of the invasive ferns Lygodium microphyllum and L. japonicum (Schizaeaceae): implications for invasive potential

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