scholarly journals Inbreeding depression is high in a self-incompatible perennial herb population but absent in a self-compatible population showing mixed mating

2017 ◽  
Vol 7 (20) ◽  
pp. 8535-8544 ◽  
Author(s):  
Marie Voillemot ◽  
John R. Pannell
Keyword(s):  
Inbreeding Depression ◽  
Perennial Herb ◽  
Mixed Mating

Selection by parasites for clonal diversity and mixed mating

1994 ◽  
Vol 346 (1317) ◽  
pp. 271-281 ◽  
Keyword(s):  
Computer Simulations ◽  
Inbreeding Depression ◽  
Reproductive Strategies ◽  
Deleterious Mutation ◽  
Clonal Diversity ◽  
Evolutionary Stability ◽  
Mixed Mating ◽  
Dioecious Populations ◽  
Cross Fertilization ◽  
Evolutionarily Stable

On theoretical grounds, coevolutionary interactions with parasites can select for cross-fertilization, even when there is a twofold advantage gained by reproducing through uniparental means. The suspected advantage of cross-fertilization stems from the production of genetically rare offspring, which are expected to be more likely to escape infection by coevolving enemies. In the present study, we consider the effects that parasites have on parthenogenetic mutants in obligately sexual, dioecious populations. Computer simulations show that repeated mutation to parthenogenesis can lead to the accumulation of clones with different resistance genotypes, and that a moderately diverse set of clones could competitively exclude the ancestral sexual subpopulation. The simulations also show that, when there are reasonable rates of deleterious mutation, Muller’s ratchet combined with coevolutionary interactions with parasites can lead to the evolutionary stability of cross-fertilization. In addition, we consider the effects that parasites can have on the evolution of uniparental reproduction in cosexual populations. Strategy models show that parasites and inbreeding depression could interact to select for evolutionarily stable reproductive strategies that involve mixtures of selfed and outcrossed progeny.

scholarly journals Low levels of inbreeding depression and enhanced fitness in cleistogamous progeny in the annual plant Triodanis perfoliata

Botany ◽  
2019 ◽  
Vol 97 (7) ◽  
pp. 405-415 ◽  
Author(s):  
Beth H. Ansaldi ◽  
Jennifer J. Weber ◽  
Carol Goodwillie ◽  
Steven J. Franks
Keyword(s):  
Inbreeding Depression ◽  
Mixed Mating ◽  
Life Stages ◽  
Annual Plant ◽  
Flower Type ◽  
Low Levels ◽  
Two Populations ◽  
Selfing Species

The maintenance of outcrossing in cleistogamous plants that produce both open, facultatively outcrossing chasmogamous (CH), and closed, obligate selfing cleistogamous (CL) flowers is puzzling because CL reproduction is thought to be more reliable and less costly. A possible explanation for the maintenance of CH flowers is the avoidance of inbreeding depression. However, inbreeding depression for cleistogamous species has rarely been quantified. In this study, we estimate levels of inbreeding depression in plants from three populations of Triodanis perfoliata (L.) Nieuwl., a dimorphic cleistogamous annual, under greenhouse conditions. Estimates of inbreeding depression at multiple life stages in all three populations were low and often not different from zero. Inbreeding depression at specific life stages varied, with two populations showing later-acting inbreeding depression, which is also found in other selfing species. In two of the study populations, selfed CL progeny outperformed selfed CH progeny, indicating a flower-type effect. The low levels of inbreeding depression and the superior fitness of CL compared with selfed CH flowers that we observed make the maintenance of CH flowers in this system surprising, and suggest that other advantages of outcrossing CH flowers are likely responsible for maintaining mixed mating in this species.

scholarly journals ANALYSIS OF INBREEDING DEPRESSION IN MIXED-MATING PLANTS PROVIDES EVIDENCE FOR SELECTIVE INTERFERENCE AND STABLE MIXED MATING

Evolution ◽  
2011 ◽  
Vol 65 (12) ◽  
pp. 3339-3359 ◽  
Author(s):  
Alice A. Winn ◽  
Elizabeth Elle ◽  
Susan Kalisz ◽  
Pierre-Olivier Cheptou ◽  
Christopher G. Eckert ◽  
...  
Keyword(s):  
Inbreeding Depression ◽  
Mixed Mating ◽  
Selective Interference
Sign in / Sign up

Export Citation Format

Share Document