Models for the evolution of selfing under alternative modes of inheritance

Latta, Robert G.; Ritland, Kermit

doi:10.1038/hdy.1993.101

Cited by 39 publications

(28 citation statements)

References 39 publications

(26 reference statements)

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“…Based on their model of the coevolution of mating systems and inbreeding depression, Schultz and Willis (1995) concluded that associations between mating system and viability loci may not be detectable when mating system modifiers have only small quantitative effects on selfing rates. Similarly, Latta and Ritland (1993) have demonstrated the mode of inheritance of mating-system determinants has a large effect on equilibrium predictions, with multilocus inheritance promoting more favorable conditions for mixed mating. Clearly the theory needs to be expanded to include multilocus determination of selfing rates as well as multilocus fitness determinants.…”

Section: Discussionmentioning

confidence: 99%

“…Species (Dole and Ritland 1993;Carr and Dudash 1996) and populations (Latta and Ritland 1993) of Mimulus that have higher selfing rates have lower inbreeding depression than those that are more outcrossing, a pattern common in flowering plants (Husband and Schemske 1996). What is not known is whether these current associations were initially responsible for driving the evolution of selfing in their ancestral populations (Holsinger 1991;Uyenoyama and Waller 1991a,b).…”

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confidence: 99%

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THE RELATIONSHIP BETWEEN MATING‐SYSTEM CHARACTERS AND INBREEDING DEPRESSION IN MIMULUS GUTTATUS

1997

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Abstract.-Several recent theoretical considerations of mating-system evolution predict within-population covariation between levels of inbreeding depression and genetically controlled mating-system characters. If inbreeding depression is caused by deleterious recessive alleles, families with characters that promote self-pollination should show lower levels of inbreeding depression than families with characters that promote outcrossing. The converse is expected if inbreeding depression is due to overdominant allelic interactions. Whether these associations between mating-system and viability loci evolve will have important consequences for mating-system evolution. The evolution of selfing within the genus Mimulus is associated with a reduction in stigma-anther separation (i.e., a loss of herkogamy) and high autogamous seed set. In this study we compared families from two M. guttatus populations that differed genetically in their degree of stigma-anther separation. In one of these populations we also compared families that differed genetically in the degree to which they autogamously set seed in a pollinator-free greenhouse. Dams often differed significantly in levels of inbreeding depression for aboveground biomass and flower production, but variation in inbreeding depression was never explained by herkogamy class or autogamy class. Several factors might account for why families with traits associated with selfing did not show lower inbreeding depression, and these are discussed. Our study also demonstrated significant variation among self progeny from a given female likely due to differences in pollination date and position of fruit maturation. The detection of significant dam x sire interactions suggests biparental inbreeding or differences in combining ability for specific pairs of parents.Key words.-Combining ability, identity disequilibrium, inbreeding depression, maternal effects, mating system, Mimulus. Received February 6, 1996. Within a plant population, genotypes capable of self-pollination enjoy several potential advantages over outcrossing genotypes. If there is no reduction in their ability to serve as pollen donors in cross-pollinations, selfing variants have a 50% transmission advantage over strictly outcrossing genotypes (Fisher 1941). However, if self progeny are less than half as fit as outcross progeny due to inbreeding depression, the transmission bias is nullified and the spread of alleles that increase the selfing rate is prevented (e.g., Maynard Smith 1971; Charlesworth and Charlesworth 1979Lloyd 1979;Lande and Schemske 1985). Most empirical studies of mating-system evolution have focused on average levels of inbreeding depression within populations, and many have found that inbreeding depression often exceeds the 50% threshold required to prevent the invasion of selfing variants into outcrossing populations (e.g., Dudash 1990; Fenster 1991a; Dole and Ritland 1993). Only recently have studies begun to focus on genetic variation for inbreeding depression within populations (e.g., Pray and...

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

THE RELATIONSHIP BETWEEN MATING‐SYSTEM CHARACTERS AND INBREEDING DEPRESSION IN MIMULUS GUTTATUS

1997

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“…4. Latta and Ritland (1993) showed that mixed mating can be stable for selfing diploids when there is a monotonical decline in fitness for serial inbreeding. We followed a similar strategy to Damgaard et al (1992) to show mixed mating may be stable for selfing diploids.…”

Section: Resultsmentioning

confidence: 98%

“…He showed that mixed mating systems could evolve as pure inbreeding or outbreeding populations were not resistant against opposite strategies invading. In support, Latta and Ritland (1993) showed, using recursive equations for multiple loci, that a decline in fitness of serial inbred individuals led to stable mixed mating. They found that mixed mating evolved at higher frequencies when controlled by increasing numbers of genes.…”

Section: Introductionmentioning

confidence: 83%

Evolutionarily stable mixed mating in a variety of genetic systems

Nelson

Greeff

2010

Evol Ecol

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Many species display a mixture of close inbreeding and outbreeding which is referred to as mixed mating. For selfing species, models predict that such mixed mating systems can be stable. Conversely, models considering separate sex species have not been able to explain mixed mating systems. This failure may be a result of the unrealistic assumption that recurrent inbreeding does not increase the inbreeding coefficient. Here we show that mixed mating is expected in separate sex systems when recurrent inbreeding is taken into account. A female that allows her brother to sibmate with her gives an extra mating opportunity to said brother. This kin selective advantage should be strongest in genetic systems where the male is more related to the female. In support of this idea, we find that inbreeding evolves most easily in selfers, followed by diploid sibmating, followed by haplodiploid sibmating. Consideration of published values for the regression of fitness on inbreeding coefficient suggests that many species fall in a range where some selfing/ sibmating is optimal.

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“…The genetic basis of the mating system-that is, the number of loci and levels of dominance-has been shown to affect the evolutionary outcome of selection in some models of mating system evolution (Charlesworth and Charlesworth 1990;Latta and Ritland 1993). For instance, Latta and Ritland (1993) showed that, under some conditions, mixed mating systems can be evolutionarily stable and that this outcome is more likely when many genes control the rate of selfing.…”

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confidence: 98%

The Genetic Basis of Floral Traits Associated With Mating System Evolution in Leptosiphon (Polemoniaceae): An Analysis of Quantitative Trait Loci

Goodwillie

Ritland

2006

Evolution

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Mapping of quantitative trait loci (QTL) was used to investigate the genetic architecture of divergence in floral characters associated with the mating system, an important adaptive trait in angiosperms. Two species of Leptosiphon (Polemoniaceae), one strongly self-fertilizing (L. bicolor) and the other partially outcrossing (L. jepsonii), were crossed to produce F2 and both backcross progenies. For each crossing population, a linkage map was created using amplified fragment length polymorphism markers, and QTL were identified for several dimensions of floral size. For each of the five traits examined, three to seven QTL were detected, with independent datasets yielding congruent results in some but not all cases. The phenotypic effect of individual QTL was generally moderate. We estimated that many of the QTL were additive or showed dominance toward L. bicolor, whereas comparison of mean trait values for parental and cross progenies showed apparent overall dominance of L. jepsonii traits. Colocalization of QTL for different dimensions of floral size was consistent with high phenotypic correlations between floral traits. Substantial segregation distortion was observed in marker loci, the majority favoring alleles from the large-flowered parent. A low frequency of male sterility in the F2 population is consistent with the Dobzhansky-Muller model for the evolution of reproductive isolation.

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Models for the evolution of selfing under alternative modes of inheritance

Cited by 39 publications

References 39 publications

THE RELATIONSHIP BETWEEN MATING‐SYSTEM CHARACTERS AND INBREEDING DEPRESSION IN MIMULUS GUTTATUS

THE RELATIONSHIP BETWEEN MATING‐SYSTEM CHARACTERS AND INBREEDING DEPRESSION IN MIMULUS GUTTATUS

Evolutionarily stable mixed mating in a variety of genetic systems

The Genetic Basis of Floral Traits Associated With Mating System Evolution in Leptosiphon (Polemoniaceae): An Analysis of Quantitative Trait Loci

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