Drought Stress and Inbreeding Depression in Lychnis flos-cuculi (Caryophyllaceae)

Hauser, Thure P.; Loeschcke, Volker

doi:10.2307/2410652

Cited by 72 publications

(73 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The negative effects of low pollen diversity on offspring performance were not significantly enhanced under stressful environmental conditions in our study. By comparison, other studies (Hauser & Loeschke, 1996;Dahlgaard & Loeschke, 1997) found stronger inbreeding depression under stressful environmental conditions. This suggests that even if purging has occurred under environmental conditions closer to the species' optimum, additional inbreeding depression is still expressed under novel conditions (Bijlsma et al, 1999).…”

Section: Effects Of Low Vs High Pollen Diversitycontrasting

confidence: 77%

Effects of inbreeding and pollen donor provenance and diversity on offspring performance under environmental stress in the rare plant Cochlearia bavarica

Paschke

Bernasconi

Schmid

2005

Basic and Applied Ecology

View full text Add to dashboard Cite

SummaryHabitat degradation and loss can reduce size and genetic variability of natural populations, increasing individual homozygosity and average relatedness between individuals. While the resulting inbreeding depression may be reduced by natural selection under prevailing environmental conditions, it may increase again under environmental stress. To investigate the effect of environmental stress on offspring performance and the expression of inbreeding depression, we hand-pollinated maternal plants in small (o 100, n ¼ 5) and large populations (4 400 flowering plants, n ¼ 5) of the rare plant Cochlearia bavarica (Brassicaceae) and raised the offspring under experimentally manipulated water and light regimes (normal or reduced supply). In addition to considering natural variation in inbreeding levels due to population size, we manipulated pollen donor provenance and diversity. Maternal plants were pollinated with nine donors from a different population or with one or nine donors from the same population. One further inflorescence of each maternal plant was exposed to free pollination. Offspring growth and survival were monitored over 300 days. Offspring performance varied significantly among populations and maternal plants. Environmental stress interacted significantly with these factors. However, there was no general indication that offspring from small populations were more negatively affected. In seven out of 10 populations, offspring derived from between-population pollination performed better than offspring derived from withinpopulation pollination. Also, in five out of 10 populations, average offspring size was KEYWORDS Environmental stress; Genetic variation; Inbreeding depression; Outbreeding; Pollen diversity; Population size; Rare plant species; Reaction norm higher after within-population pollination with nine than after pollination with one pollen donor. These results suggest low genetic diversity within C. bavarica populations, both smaller and larger ones. Interactions between environmental stress and pollination treatment indicated that using pollen donors from outside a population or increasing the number of pollen donors can reduce inbreeding depression, but that this beneficial effect is impaired under stressful conditions.

show abstract

Section: Effects Of Low Vs High Pollen Diversitycontrasting

confidence: 77%

Effects of inbreeding and pollen donor provenance and diversity on offspring performance under environmental stress in the rare plant Cochlearia bavarica

Paschke

Bernasconi

Schmid

2005

Basic and Applied Ecology

View full text Add to dashboard Cite

show abstract

“…Inbreeding depression may increase with environmental harshness over applies to a range of stress levels (Komaki, 1982;Levin, 1984;Pray ci' al., 1994;Hauser & Loeschcke, 1996). However, when a stress is extremely severe, differences in survival among inbreeding groups may be diminished when the stress level is elevated further (Dahlgaard et a!., 1995).…”

Section: Discussionmentioning

confidence: 99%

Effects of inbreeding in three life stages of Drosophila buzzatii after embryos were exposed to a high temperature stress

Dahlgaard

Loeschcke

1997

Heredity

Self Cite

View full text Add to dashboard Cite

“…Inbreeding usually reduces mean fitness relative to outbred individuals (inbreeding depression), but there is conflicting evidence on whether inbreeding depression is exaggerated in stressful environments (relationship supported: Hauser & Loeschke (1996), Bijlsma et al (1999); relationship unsupported: Dahlgaard & Loeschke (1997), Dahlgaard & Hoffmann (2000)). …”

Section: Introductionmentioning

confidence: 99%

Environmental stress, inbreeding, and the nature of phenotypic and genetic variance inDrosophila melanogaster

Fowler

Whitlock

2002

Proc. R. Soc. Lond. B

View full text Add to dashboard Cite

Fifty-two lines of Drosophila melanogaster founded by single-pair population bottlenecks were used to study the effects of inbreeding and environmental stress on phenotypic variance, genetic variance and survivorship. Cold temperature and high density cause reduced survivorship, but these stresses do not cause repeatable changes in the phenotypic variance of most wing morphological traits. Wing area, however, does show increased phenotypic variance under both types of environmental stress. This increase is no greater in inbred than in outbred lines, showing that inbreeding does not increase the developmental effects of stress. Conversely, environmental stress does not increase the extent of inbreeding depression. Genetic variance is not correlated with environmental stress, although the amount of genetic variation varies significantly among environments and lines vary significantly in their response to environmental change. Drastic changes in the environment can cause changes in phenotypic and genetic variance, but not in a way reliably predicted by the notion of 'stress'.

show abstract

Drought Stress and Inbreeding Depression in Lychnis flos-cuculi (Caryophyllaceae)

Cited by 72 publications

References 18 publications

Effects of inbreeding and pollen donor provenance and diversity on offspring performance under environmental stress in the rare plant Cochlearia bavarica

Effects of inbreeding and pollen donor provenance and diversity on offspring performance under environmental stress in the rare plant Cochlearia bavarica

Effects of inbreeding in three life stages of Drosophila buzzatii after embryos were exposed to a high temperature stress

Environmental stress, inbreeding, and the nature of phenotypic and genetic variance inDrosophila melanogaster

Contact Info

Product

Resources

About