Mating system estimation via the one pollen parent model with the progeny array as the unit of observation

Schoen, Daniel J.

doi:10.1038/hdy.1988.62

Cited by 14 publications

(12 citation statements)

References 14 publications

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“…Joint estimates of sand F for a single generation can be obtained from progeny arrays (progenies descended from a common mother) assayed for marker loci, even if maternal parent is unknown. By formulating statistical models that regard the progeny array as the unit of observation (Ritland, 1986;Schoen, 1988), the joint estimation variance ofsand F can be obtained when parentage is unknown.…”

Section: Equilibrium Of F Assumedmentioning

confidence: 99%

“…Several field studies have demonstrated its presence in the field via transplants of selfed and outcrossed seedlings (cf. Schoen, 1983;Mitchell-Olds and Waller, 1985;Charlesworth and Charlesworth, 1987;Kohn, 1988). However, inbreeding depression is a quantitative character whose expression is environmentally dependent, and alternative methods to measure it in the field, involving a minimum of artificial disturbance, need investigation.…”

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confidence: 99%

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Inferences About Inbreeding Depression Based on Changes of the Inbreeding Coefficient

1990

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Abstract. -In a mixed-mating population, the fitness of selfed individuals, relative to outcrossed individuals, can be estimated from observed changes of the inbreeding coefficient F. In general, three measurements of F. or two measurements of F and one of the selfing rate, spanning two generations are needed. If however, adult F is assumed constant among generations, the adult F and selfing rate of one generation are sufficient to estimate relative fitness. Estimates ofthe relative fitness ofselfed individuals for 14 Mimulus populations, assuming equilibrium ofadult F, averaged 0.38, which is significantly lower than the 0.50 threshold needed to favor selfing genotypes. However, estimates for some populations showed large variance and over the 14 populations, relative fitness did not correlate with selfing rate. Violations ofthe equilibrium assumption causes a positive bias of the estimate and a spurious negative correlation of estimates with selfing rate. Estimates of relative fitness based on two generations of F do not suffer these problems. The need for large sample sizes, muitiallelic loci, and moderate levels of natural selfing limits the usefulness of using changes of F to infer inbreeding depression.

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Section: Equilibrium Of F Assumedmentioning

confidence: 99%

mentioning

confidence: 99%

Inferences About Inbreeding Depression Based on Changes of the Inbreeding Coefficient

1990

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“…In the model description below, it is assumed that all outcrossed seeds within single fruits have one pollen parent (cf. Schoen and Clegg, 1984;Schoen, 1988). This is not an essential element of the model, but is done here as the Glycine species for which data are available appear to conform well to the assumption (Brown et al, 1986).…”

Section: The Wholeand Part-flower Self-pollination Model and Associatmentioning

confidence: 95%

“…For instance, Lloyd (1979Lloyd ( , 1987Lloyd ( , 1988, Holsinger et al (1984), and Schoen and Lloyd (1984) have shown that the mode of selffertilization (e.g., prior, competing, delayed, cleistogamous, or geitonogamous) can influence the outcome of selection of a selffertilizing phenotype or a gene coding for self-fertilization. An appreciation of the mode of self-fertilization is also relevant to the accurate estimation of self-fertilization rate, because violation of assumptions of the mating system model on which estimation procedures are founded can lead to biased estimates of mating system parameters (Schoen andClegg, 1984, 1986). Furthermore, the mode ofself-fertilization may determine the effectiveness of post-pollination events as potential factors influencing the reproductive system.…”

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confidence: 99%

Whole- and Part-Flower Self-Pollination in Glycine clandestina and G. argyrea and the Evolution of Autogamy

Schoen¹,

Brown²

1991

Evolution

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The overall rate of self-fertilization can be viewed as the sum of two distinct processes: 1) self-pollination of all ovules in a flower (whole-flower self-pollination); and 2) self-pollination of some of the ovules in a flower, occurring together with outcrossing of the remaining ovules (part-flower self-pollination). In some situations these processes may be equated with different modes of self-pollination. A model of the mating system in which the progeny of separate fruits serve as the unit ofobservation is presented. The model partitions the overall rate ofself-pollination into components attributable to whole-and part-flower selling. When the mating system is estimated using information on marker genotypes from chasmogamous fruits in two species of Glycine together with the whole-and part-flower selfing model, the results indicate that the chasmogamous flowers in a subalpine population of G. clandestina underwent a significant level of whole-flower selfing, whereas in another, lower elevation population of G. clandestina and in a subtropical population of G. argyrea, they did not. This difference is thought to be related to the contrast in the variability of environmental conditions for insect-mediated pollination between the habitats sampled. In particular, the large component of whole-flower selling observed in the subalpine population of G. clandestina may be due to self-pollination that is induced during periods unfavorable to insect-mediated pollination. It can be demonstrated that such induced selfing will be selected whenever environmental conditions are such that pollinator activity limits seed set, and moreover that induced selling can result in the selection of overall levels of self-pollination that are intermediate between 0 and 1. Monte Carlo simulation is employed to show that ignoring the correlation of self-fertilization events that result from whole-and part-flower selfing may lead to biased estimates of mating system parameters.

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“…In multiseeded fruit, outcrossed progeny may share the same male parent if siring pollen derives from one source [35] or one pollination event [23]. Correlation of outcrossed paternal parentage has been reported for several species [15,22,23].…”

Section: Introductionmentioning

confidence: 99%

Mating system and multiple paternity in Hedysarum coronarium L. (Fabaceae)

Namouchi¹,

Louati²,

Chriki³

2000

Agronomie

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-The mating system was studied in four populations of Hedysarum coronarium under the mixed-mating model (MMM) and the effective selfing model (ESM) by analysis of progeny arrays. Multilocus population outcrossing rates ranged from 0.822 to 1.013. Pollination experiments indicated that H. coronarium is self-compatible, and therefore the high outcrossing rates were attributed to inbreeding depression. This view was supported by high levels of seed abortion in self pollination when compared to open pollination. The effective selfing rate ranged from E = 0.026 to E = 0.183. Positive covariance of selfing with gene fixation (D = 0.085) was observed in one population and could be attributed to subpopulation structure and mating between relatives. Estimates of the level of multiple paternity under the correlated mating model (CMM) was assessed at the progeny array level. The correlation of the outcrossed paternity (r p ) ranged from 0.029 to 0.342 and according to the outcrossing rates, up to 80% of the total seeds in a progeny array may have different male parents.

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Mating system estimation via the one pollen parent model with the progeny array as the unit of observation

Cited by 14 publications

References 14 publications

Inferences About Inbreeding Depression Based on Changes of the Inbreeding Coefficient

Inferences About Inbreeding Depression Based on Changes of the Inbreeding Coefficient

Whole- and Part-Flower Self-Pollination in Glycine clandestina and G. argyrea and the Evolution of Autogamy

Mating system and multiple paternity in Hedysarum coronarium L. (Fabaceae)

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