The Evolutionary Dynamics of Mixed Mating Systems: On the Adaptive Value of Selfing and Biparental Inbreeding

Uyenoyama, Marcy K.; Antonovics, Janis

doi:10.1007/978-1-4613-1815-6_5

Cited by 6 publications

(3 citation statements)

References 62 publications

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“…For this reason, biparental inbreeding might promote frequencydependent selection that stabilizes intermediate outcrossing (Uyenoyama 1986). Alternatively, biparental inbreeding could have a destabilizing effect in mating system evolution if, as it increases with the selfing rate, it reduces the fitness of outcrossed progeny, thereby reducing realized inbreeding depression (Lloyd 1979, Uyenoyama & Antonovics 1987, a factor not included in Uyenoyama's (1986) original formulation. Mating among relatives can also influence the evolution of inbreeding depression, but the rate of purging depends on parameters of population size and structure (Waller 1993).…”

Section: Biparental Inbreedingmentioning

confidence: 99%

“…In this case, biparental inbreeding conferred stability because population structure promoted an increase in inbreeding depression with increased selfing above some threshold selfing rate (Ronfort & Couvet 1995). The ultimate effect of biparental inbreeding on mating system dynamics, therefore, is difficult to predict and may depend on current levels of inbreeding depression (Uyenoyama & Antonovics 1987, Yahara 1992.…”

Section: Biparental Inbreedingmentioning

confidence: 99%

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The Evolutionary Enigma of Mixed Mating Systems in Plants: Occurrence, Theoretical Explanations, and Empirical Evidence

Goodwillie

Kalisz

Eckert

2005

Annu. Rev. Ecol. Evol. Syst.

978

1,187

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Mixed mating, in which hermaphrodite plant species reproduce by both self-and cross-fertilization, presents a challenging problem for evolutionary biologists. Theory suggests that inbreeding depression, the main selective factor opposing the evolution of selfing, can be purged with self-fertilization, a process that is expected to yield pure strategies of either outcrossing or selfing. Here we present updated evidence suggesting that mixed mating systems are frequent in seed plants. We outline the floral and pollination mechanisms that can lead to intermediate outcrossing, review the theoretical models that address the stability of intermediate outcrossing, and examine relevant empirical evidence. A comparative analysis of estimated inbreeding coefficients and outcrossing rates suggests that mixed mating often evolves despite strong inbreeding depression. The adaptive significance of mixed mating has yet to be fully explained for any species. Recent theoretical and empirical work suggests that future progress will come from a better integration of studies of floral mechanisms, genetics, and ecology, and recognition of how selective pressures vary in space and time.

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Section: Biparental Inbreedingmentioning

confidence: 99%

Section: Biparental Inbreedingmentioning

confidence: 99%

The Evolutionary Enigma of Mixed Mating Systems in Plants: Occurrence, Theoretical Explanations, and Empirical Evidence

Goodwillie

Kalisz

Eckert

2005

Annu. Rev. Ecol. Evol. Syst.

978

1,187

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“…To account for mixed mating, many genetic models have outlined situations in which both reproductive strategies can be maintained (Charlesworth et al, 1990). For example, the advantage to outcrossing may be frequency-dependent (Uyenoyama, 1986;Uyenoyama and Antonovics, 1987). That is, the more inbreeding there is in a population, the greater the likelihood that a plant will mate with a sibling when it does outcross.…”

Section: Discussionmentioning

confidence: 99%

A Measure of the Various Modes of Inbreeding in Kalmia latifolia

Levri¹

2000

Annals of Botany

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Inbreeding can occur in several ways. For a given species, analysing overall inbreeding down to its component parts can be useful in explaining how and why inbreeding is maintained in a population. Kalmia latifolia, a long-lived evergreen shrub, was chosen for this study for two reasons: its unique¯oral morphology suggested that it was specially adapted to assure reproduction in the delayed mode of self-fertilization, and previous studies had suggested that populations that were more limited by pollinators showed higher rates of within-¯ower self-fertilization when pollinators were excluded. Floral manipulations, controlled pollinations, and paternity analysis were performed to determine the most common form of inbreeding within a¯ower, among¯owers of one individual, or among related individuals. Although plants are capable of setting seed within a¯ower, the overall rate of inbreeding was low. Among the modes of inbreeding within one individual, a negligible sel®ng rate among emasculated¯owers suggests that sel®ng is more prevalent within a¯ower than among¯owers on the same plant. In addition, as the multi-locus estimate of inbreeding was less than the single-locus estimate, inbreeding among related individuals also contributes to the natural level of inbreeding.

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Breeding System Evolution in Leavenworthia: Breeding System Variation and Reproductive Success in Natural Populations of Leavenworthia Crassa (Cruciferae)

Lyons

Antonovics

1991

American J of Botany

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Populations of Leavenworthia crassa (Cruciferae) studied for 3 years exhibited among‐ and within‐population genetic variation for a suite of floral and reproductive traits (flower width, petal length, anther position, ability to set seeds in the absence of pollinators, time to first flowering) associated with breeding system. We used electrophoretic markers to show that a population with small, monomorphically colored flowers with introrse anthers had a significantly lower outcrossing rate (t = 0.03) than did a population with larger, polymorphically colored flowers with extrorse anthers (t = 0.33). In the more‐outcrossing population the correlation between higher maternal plant outcrossing rate and the suite of six traits approached significance (P < 0.067), with greater petal size, greater flower width, and reduced ability to set seeds in the absence of pollinators contributing significantly. Plants in selfing populations had a generally higher reproductive success, with a higher number of flowers per plant, a smaller proportion of unfertilized ovules, a smaller proportion of fertilized ovules aborted, a higher rate of fruit set, and overall a larger number of seeds matured than did plants from the more outcrossing populations. Pollen limitation did not appear to account for lower reproductive success in outcrossing populations. Resource limitation did not differ substantially between populations. However, within‐ovary patterns of fertilization, abortion, and seed weight were significantly less random in outcrossing populations than in selfing populations, suggesting that differential gamete and embryo success may be responsible for lower reproductive success in outcrossing populations.

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The Evolutionary Dynamics of Mixed Mating Systems: On the Adaptive Value of Selfing and Biparental Inbreeding

Cited by 6 publications

References 62 publications

The Evolutionary Enigma of Mixed Mating Systems in Plants: Occurrence, Theoretical Explanations, and Empirical Evidence

The Evolutionary Enigma of Mixed Mating Systems in Plants: Occurrence, Theoretical Explanations, and Empirical Evidence

A Measure of the Various Modes of Inbreeding in Kalmia latifolia

Breeding System Evolution in Leavenworthia: Breeding System Variation and Reproductive Success in Natural Populations of Leavenworthia Crassa (Cruciferae)

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