Experimental Dissection of Inbreeding and Its Adaptive Significance in a Flowering Plant, Aquilegia Canadensis (Ranunculaceae)

Herlihy, Christopher R.; Eckert, Christopher G.

doi:10.1554/04-439

Cited by 38 publications

(63 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This population also exhibits substantial biparental inbreeding, which would normally be suppressed if plants shared dominant or codominant S ‐alleles. These results collectively illustrate how self‐compatibility per se permits both autogamous and biparental components of inbreeding in nature (Herlihy and Eckert, 2004).…”

Section: Discussionmentioning

confidence: 57%

Mixed mating in a recently derived self‐compatible population of Leavenworthia alabamica (Brassicaceae)

Busch

Herlihy

Gunn

et al. 2010

American J of Botany

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 57%

Mixed mating in a recently derived self‐compatible population of Leavenworthia alabamica (Brassicaceae)

Busch

Herlihy

Gunn

et al. 2010

American J of Botany

Self Cite

View full text Add to dashboard Cite

show abstract

“…From flowering phenology, the protogynous morph is expected to exhibit a higher level of assortative mating than the protandrous morph. However, the pollen dispersal pattern and spatial genetic structure determine the frequency distribution of genetic relatedness of pollen receipt by female gametes (Herlihy & Eckert, 2004).…”

Section: Introductionmentioning

confidence: 99%

Mating patterns and pollen dispersal in a heterodichogamous tree, Juglans mandshurica (Juglandaceae)

2007

View full text Add to dashboard Cite

Summary• Mating patterns in heterodichogamous species are generally considered to be disassortative between flowering morphs, but this hypothesis has hitherto not been vigorously tested. Here, mating patterns and pollen dispersal were studied in Juglans mandshurica , a heterodichogamous wind-pollinated species that is widely distributed in northern and north-eastern China.• Paternity analyses carried out on 11 microsatellite loci were used to estimate morph-specific rates of outcrossing and disassortative mating. Pollen dispersal and genetic structure were also investigated in the population under study.• The mating pattern of J. mandshurica was highly outcrossing and disassortative. Pairwise values of intramorph relatedness were much higher than those of intermorph relatedness, and a low level of biparental inbreeding was detected. There was no significant difference in outcrossing and disassortative mating rates between the two morphs. The effective pollen dispersal distribution showed an excess of near-neighbor matings, and most offspring of individual trees were sired by one or two nearby trees.• These results corroborate the previous suggestion that mating in heterodichogamous plant species is mainly disassortative between morphs, which not only prevents selfing but also effectively reduces intramorph inbreeding.

show abstract

“…For example, in highly clonal, mass‐flowering Decodon verticillatus, Eckert and Barrett (1994) did not find differences in self‐fertilization among style morphs differing in herkogamy, largely because self‐fertilization occurs almost entirely through geitonogamy in this species (Eckert 2000). Very few studies have determined how selfing occurs in natural populations (reviewed in Herlihy and Eckert 2004), and an effect of herkogamy on autogamous selfing, specifically, has not been demonstrated.…”

mentioning

confidence: 99%

Evolutionary Analysis of a Key Floral Trait in Aquilegia Canadensis (Ranunculaceae): Genetic Variation in Herkogamy and Its Effect on the Mating System

Herlihy

Eckert

2007

Evolution

Self Cite

View full text Add to dashboard Cite

The mating system of flowering plant populations evolves through selection on genetically based phenotypic variation in floral traits. The physical separation of anthers and stigmas within flowers (herkogamy) is expected to be an important target of selection to limit self-fertilization. We investigated the pattern of phenotypic and genetic variation in herkogamy and its effect of selffertilization in a broad sample of natural populations of Aquilegia canadensis, a species that is highly selfing despite strong inbreeding depression. Within natural populations, plants exhibit substantial phenotypic variation in herkogamy caused primarily by variation in pistil length rather than stamen length. Compared to other floral traits, herkogamy is much more variable and a greater proportion of variation is distributed among rather than within individuals. We tested for a genetic component of this marked phenotypic variation by growing naturally pollinated seed families from five populations in a common greenhouse environment. For three populations, we detected a significant variation in herkogamy among families, and a positive regression between parental herkogamy measured in the field and progeny herkogamy in the greenhouse, suggesting that there is often genetic variation in herkogamy within natural populations. We estimated levels of self-fertilization for groups of flowers that differed in herkogamy and show that, as expected, herkogamy was associated with reduced selfing in 13 of 19 populations. In six of these populations, we performed floral emasculations to show that this decrease in selfing is due to decreased autogamy (within-flower selfing), the mode of selfing that herkogamy should most directly influence. Taken together, these results suggest that increased herkogamy should be selected to reduce the production of low-quality selfed seed. The combination of high selfing and substantial genetic variation for herkogamy in A. canadensis is enigmatic, and reconciling this observation will require a more integrated analysis of how herkogamy influences not only self-fertilization, but also patterns of outcross pollen import and export.KEY WORDS: Aquilegia canadensis, autogamy, heritability, herkogamy, inbreeding depression, outcrossing, self-fertilization.Evolution of the tremendous diversity of mating systems exhibited by flowering plants involves natural selection acting on phenotypic variation in plant traits such as floral morphology, devel-

show abstract

Experimental Dissection of Inbreeding and Its Adaptive Significance in a Flowering Plant, Aquilegia Canadensis (Ranunculaceae)

Cited by 38 publications

References 71 publications

Mixed mating in a recently derived self‐compatible population of Leavenworthia alabamica (Brassicaceae)

Mixed mating in a recently derived self‐compatible population of Leavenworthia alabamica (Brassicaceae)

Mating patterns and pollen dispersal in a heterodichogamous tree, Juglans mandshurica (Juglandaceae)

Evolutionary Analysis of a Key Floral Trait in Aquilegia Canadensis (Ranunculaceae): Genetic Variation in Herkogamy and Its Effect on the Mating System

Contact Info

Product

Resources

About