scholarly journals Diet alters delayed selfing, inbreeding depression, and reproductive senescence in a freshwater snail

2014 ◽  
Vol 4 (14) ◽  
pp. 2968-2977 ◽  
Author(s):  
Josh R. Auld ◽  
John F. Henkel
Keyword(s):  
Inbreeding Depression ◽  
Freshwater Snail ◽  
Reproductive Senescence ◽  
Delayed Selfing

scholarly journals NO CORRELATION BETWEEN INBREEDING DEPRESSION AND DELAYED SELFING IN THE FRESHWATER SNAIL PHYSA ACUTA

Evolution ◽  
2007 ◽  
Vol 61 (11) ◽  
pp. 2655-2670 ◽  
Author(s):  
Juan Sebastián Escobar ◽  
Guillaume Epinat ◽  
Violette Sarda ◽  
Patrice David
Keyword(s):  
Inbreeding Depression ◽  
Freshwater Snail ◽  
Physa Acuta ◽  
Delayed Selfing

Delayed selfing and low levels of inbreeding depression in Hibiscus trionum (Malvaceae)

2003 ◽  
Vol 51 (3) ◽  
pp. 275 ◽  
Author(s):  
Mike Ramsey ◽  
Leahwyn Seed ◽  
Glenda Vaughton
Keyword(s):  
Life Cycle ◽  
Seed Production ◽  
Inbreeding Depression ◽  
Flower Production ◽  
Delayed Selfing ◽  
Life Cycle Stages ◽  
Hibiscus Trionum ◽  
Eastern Australia ◽  
Annual Herb ◽  
Low Levels

We used experimental pollinations to examine the breeding system and inbreeding depression in Hibiscus trionum L., an annual herb of cultivated and disturbed sites in eastern Australia. Seeds were not produced asexually. Flowers were fully self-compatible and autonomously self-pollinating. Autonomous self-pollination was due to a delayed selfing mechanism that gave precedence to cross pollen but ensured that stigmas contacted the anthers at the end of floral life. Using selfed and crossed progeny from 10 maternal plants, we examined the magnitude and timing of inbreeding depression over a range of life-cycle stages, including seed production by maternal plants, and seed germination, seedling growth, survival, flowering and seed production by F1 plants. Average cumulative inbreeding depression was 0.15, although there was considerable variation among maternal families (δ = –0.07–0.43). Inbreeding depression was not uniform across all life stages and was most prevalent late in the life cycle, affecting days to flowering and fruiting and flower production. Our results indicate that major lethal alleles have been purged from this population, probably through high levels of recurrent self-fertilisation. The flexibility in plant mating afforded by delayed selfing is likely to contribute to the invasiveness of H. trionum, particularly in annual cropping situations.

Selfing, Outcrossing, and Mixed Mating in the Freshwater Snail Physa heterostropha: Lifetime Fitness and Inbreeding Depression

1997 ◽  
Vol 116 (3) ◽  
pp. 192 ◽  
Author(s):  
Amy R. Wethington ◽  
Robert T. Dillon
Keyword(s):  
Inbreeding Depression ◽  
Freshwater Snail ◽  
Mixed Mating ◽  
Lifetime Fitness

scholarly journals Inbreeding depression in adaptive plasticity under predation risk in a freshwater snail

2009 ◽  
Vol 6 (2) ◽  
pp. 222-224 ◽  
Author(s):  
Josh R. Auld ◽  
Rick A. Relyea
Keyword(s):  
Phenotypic Plasticity ◽  
Predation Risk ◽  
Inbreeding Depression ◽  
Environmental Conditions ◽  
Chemical Cues ◽  
Natural Populations ◽  
Freshwater Snail ◽  
Adaptive Plasticity ◽  
Plastic Response ◽  
Physa Acuta

While much attention has been paid to the effects of inbreeding on fitness, this has mostly come from a genetic perspective. Consequently, the interaction between inbreeding and the environment is less well understood. To understand the effects of inbreeding in natural populations where environmental conditions are variable, we need to examine not only how the effects of inbreeding change among environments but also how inbreeding may affect the ability to respond to environmental conditions (i.e. phenotypic plasticity). We reared selfed and outcrossed hermaphroditic snails ( Physa acuta ) in the presence and absence of chemical cues from predatory crayfish and quantified expression of an inducible defence, an adaptively plastic response to predation risk. Overall, inbred snails exhibited reduced defences, but more importantly, inbreeding reduced the expression of predator-induced adaptive plasticity. Inbreeding depression in defensive morphology was 26 per cent and inbreeding depression in the plasticity of this trait was 48 per cent. Inbreeding depression in adaptive plasticity may be important to understanding the effects of inbreeding in nature.

scholarly journals Inbreeding depression of mating behavior and its reproductive consequences in a freshwater snail

2013 ◽  
Vol 25 (2) ◽  
pp. 288-299 ◽  
Author(s):  
Tim Janicke ◽  
Nikolas Vellnow ◽  
Thomas Lamy ◽  
Elodie Chapuis ◽  
Patrice David
Keyword(s):  
Mating Behavior ◽  
Inbreeding Depression ◽  
Freshwater Snail ◽  
Reproductive Consequences

scholarly journals Environment-dependent inbreeding depression in a hermaphroditic freshwater snail

2003 ◽  
Vol 16 (6) ◽  
pp. 1211-1222 ◽  
Author(s):  
P.-Y. Henry ◽  
R. Pradel ◽  
P. Jarne
Keyword(s):  
Inbreeding Depression ◽  
Freshwater Snail

Delayed Selfing and Resource Reallocations in Relation to Mate Availability in the Freshwater Snail Physa acuta

2003 ◽  
Vol 162 (4) ◽  
pp. 474-488 ◽  
Author(s):  
Anne Tsitrone ◽  
Philippe Jarne ◽  
Patrice David
Keyword(s):  
Freshwater Snail ◽  
Mate Availability ◽  
Physa Acuta ◽  
Delayed Selfing

scholarly journals Sex-specific effects of inbreeding on reproductive senescence

2018 ◽  
Vol 285 (1879) ◽  
pp. 20180231 ◽  
Author(s):  
Raïssa A. de Boer ◽  
Marcel Eens ◽  
Wendt Müller
Keyword(s):  
Inbreeding Depression ◽  
Evolutionary Biology ◽  
Full Range ◽  
Fertilization Success ◽  
Egg Laying ◽  
Clear Understanding ◽  
Reproductive Senescence ◽  
Specific Effects ◽  
Fitness Consequences ◽  
Males And Females

Inbreeding depression plays a significant role in evolutionary biology and ecology. However, we lack a clear understanding of the fitness consequences of inbreeding depression. Studies often focus on short-term effects of inbreeding in juvenile offspring, whereas inbreeding depression in adult traits and the interplay between inbreeding depression and age are rarely addressed. Inbreeding depression may increase with age and accelerate the decline in reproductive output in ageing individuals (reproductive senescence), which could be subject to sex-specific dynamics. We test this hypothesis with a longitudinal experimental study in a short-lived songbird. Adult inbred and outbred male and female canaries were paired in a 2 × 2 factorial design, and survival and annual reproductive performance were studied for 3 years. We found inbreeding depression in female egg-laying ability, male fertilization success and survival of both sexes. Annual reproductive success of both males and females declined when paired with an inbred partner independent of their own inbreeding status. This shows that inbreeding can have fitness costs in outbred individuals when they mate with an inbred individual. Further, inbred females showed faster reproductive senescence than outbred females, confirming that inbreeding depression and age can interact to affect fitness. By contrast, there was no evidence for an interaction between inbreeding depression and reproductive senescence in male fertilization success. Our findings highlight the importance of considering sex-specific effects and age to determine the full range of fitness consequences of inbreeding and demonstrate that inbreeding depression can accelerate reproductive senescence.

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