Molecular and Quantitative Genetic Differentiation in European Populations of Silene latifolia (Caryophyllaceae)

Jolivet, Céline; Bernasconi, Giorgina

doi:10.1093/aob/mcm088

Cited by 33 publications

(37 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, evidence for heterosis effects (i.e., interpopulation crosses that have higher fitness than intrapopulation crosses) has been detected in crosses between S. latifolia populations (Keller et al 2000;Richards 2000; but see Wolfe et al 2007), suggesting that populations suffer from inbreeding depression. The fact that DNA microsatellite analysis of population structure in six central European S. latifolia populations revealed significant between-population divergence, is consistent with limited interpopulation gene flow (Jolivet and Bernasconi 2007).…”

Section: Introductionsupporting

confidence: 65%

Experimental crosses within EuropeanSilene latifolia(Caryophyllaceae): intraspecific differentiation, distance effects, and sex ratio

Hathaway

Andersson

Prentice

2009

Botany

View full text Add to dashboard Cite

The dioecious weed Silene latifolia Poiret is thought to have spread northwards through Europe from separate southern source populations and shows a pronounced east-west pattern of differentiation in seed morphology. We used crossing experiments to investigate whether patterns of interfertility in S. latifolia are consistent with a scenario of ongoing speciation (reflected by outbreeding depression in crosses between the seed races), a scenario involving local inbreeding (reflected by heterosis in interpopulations crosses), or a combination of both scenarios. The experiments involved three western and three eastern populations, which were crossed reciprocally in all possible inter-and intra-population combinations. Inter-race cross-progenies did not have lower fitness than those from intra-racial crosses, and the results are not consistent with a scenario of incipient speciation. A pattern of overall heterosis was found in three variables, indicating the expression of inbreeding depression in progeny from intrapopulation crosses. For two fitness variables, negative relationships between interpopulation distance and heterosis, together with signs of outbreeding depression in the longest-distance crosses, suggest that there may be significant levels of genetic differentiation between geographically distant populations. The sex ratio was female-biased in most progenies, especially in those from the longest-distance crosses.Résumé : On croit que la plante adventice dioïque Silene latifolia Poiret s'est étendue vers le nord de l'Europe à partir de populations sources méridionales distinctes et on observe un patron marqué est-ouest dans la différenciation de sa morphologie séminale. Les auteurs ont conduit des expériences de croisement pour déterminer si les patrons d'interfertilité du S. latifolia concordent avec un scénario de spéciation continue (traduit par une dépression dans les croisements entre les races de graines), un scénario impliquant un autocroisement local (indiqué par l'hétérosis dans les croisements entre populations) ou une combinaison des deux scénarios. Les expériences impliquent trois populations occidentales et trois populations orientales qu'on a croisées réciproquement selon toutes les combinaisons entre et dans les populations. Les progénitures provenant de croisements entre races ne montrent pas moins d'adaptation que les croisements dans la race, et les résultats ne concordent pas avec un scénario de spéciation naissante. On observe un patron d'hétérosis général pour trois variables, ce qui indique l'expression d'une dépression d'autocroisement dans la progéniture provenant de croisements dans la population. Pour deux des trois variables d'adaptation, on observe des relations négatives selon les distances entre populations et l'hétérosis, lesquelles, prises ensemble avec les signes de dépression par croisements externes sur de longues distances, suggèrent qu'il puisse y avoir des degrés significatifs de différenciation génétique entre les populations géogra-phiquement éloignées. Les rapports ...

show abstract

Section: Introductionsupporting

confidence: 65%

Experimental crosses within EuropeanSilene latifolia(Caryophyllaceae): intraspecific differentiation, distance effects, and sex ratio

Hathaway

Andersson

Prentice

2009

Botany

View full text Add to dashboard Cite

show abstract

“…But recent work in native and introduced Silene latifolia (the white campion) reveals some interesting differences in the effects of admixture and the levels of inbreeding depression in native versus introduced populations. Silene latifolia occurs in differentiated populations in its native European range [32,33] and was A cross was made between plants from two locally adapted wild barley populations (AQ and ME) and performance of recombinant F 3 families (derived by selfing from the F 1 ) was evaluated at the natural field sites of the AQ and ME populations (a, native environments) and in an experimental garden at different nutrient levels (b, novel environments). Using genomewide markers, the proportion of heterozygous loci (one allele derived from each parent) and the proportion of genome content derived from either parent were estimated for each of 140 F 3 families (proportion ME ¼ 1 2 (proportion AQ)).…”

Section: Biological Invasions: Loss Of Local Adaptation Shifts the Comentioning

confidence: 99%

Population admixture, biological invasions and the balance between local adaptation and inbreeding depression

et al. 2010

View full text Add to dashboard Cite

When previously isolated populations meet and mix, the resulting admixed population can benefit from several genetic advantages, including increased genetic variation, the creation of novel genotypes and the masking of deleterious mutations. These admixture benefits are thought to play an important role in biological invasions. In contrast, populations in their native range often remain differentiated and frequently suffer from inbreeding depression owing to isolation. While the advantages of admixture are evident for introduced populations that experienced recent bottlenecks or that face novel selection pressures, it is less obvious why native range populations do not similarly benefit from admixture. Here we argue that a temporary loss of local adaptation in recent invaders fundamentally alters the fitness consequences of admixture. In native populations, selection against dilution of the locally adapted gene pool inhibits unconstrained admixture and reinforces population isolation, with some level of inbreeding depression as an expected consequence. We show that admixture is selected against despite significant inbreeding depression because the benefits of local adaptation are greater than the cost of inbreeding. In contrast, introduced populations that have not yet established a pattern of local adaptation can freely reap the benefits of admixture. There can be strong selection for admixture because it instantly lifts the inbreeding depression that had built up in isolated parental populations. Recent work in Silene suggests that reduced inbreeding depression associated with post-introduction admixture may contribute to enhanced fitness of invasive populations. We hypothesize that in locally adapted populations, the benefits of local adaptation are balanced against an inbreeding cost that could develop in part owing to the isolating effect of local adaptation itself. The inbreeding cost can be revealed in admixing populations during recent invasions.

show abstract

“…Allopatric subspeciation can result from neutral processes or selection, and both usually go hand in hand (Jolivet and Bernasconi 2007;Schneeweiss 2009, but see García-Verdugo et al 2010). Traits that are strongly related to fitness are expected to adapt over time to differences in the environment.…”

Section: Glacial Historymentioning

confidence: 99%

Differentiation in morphology and flowering phenology between two Campanula thyrsoides L. subspecies

Kuss

Stöcklin

2011

Alp Botany

View full text Add to dashboard Cite

show abstract

Molecular and Quantitative Genetic Differentiation in European Populations of Silene latifolia (Caryophyllaceae)

Cited by 33 publications

References 27 publications

Experimental crosses within EuropeanSilene latifolia(Caryophyllaceae): intraspecific differentiation, distance effects, and sex ratio

Experimental crosses within EuropeanSilene latifolia(Caryophyllaceae): intraspecific differentiation, distance effects, and sex ratio

Population admixture, biological invasions and the balance between local adaptation and inbreeding depression

Differentiation in morphology and flowering phenology between two Campanula thyrsoides L. subspecies

Contact Info

Product

Resources

About