[article]
| Titre : |
Variation of inbreeding depression in Centaurea cyanus L., a self-incompatible species |
| Type de document : |
texte imprimé |
| Auteurs : |
Solène Bellanger, Auteur ; Jean-Philippe Guillemin, Auteur ; Solène Touzeau, Auteur ; Henri Darmency, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
pp. 24–29 |
| Langues : |
Anglais (eng) |
| Catégories : |
[Espèces (in biblio)] Centaurea cyanus
|
| Mots-clés : |
plante messicole caractérisation génétique |
| Résumé : |
"tThe evolutionary trajectory of isolated or small populations of self-incompatible species depends ongenetic variation in the capacity to transition to self-compatibility and the impact of inbreeding onplant fitness. Centaurea cyanus is an example of a self-incompatible, arable field-dependent weed speciesthat is in regression in western Europe due to agricultural intensification. However, some cases of self-fertilization have been observed. Here, we investigated how inbreeding depression impacts the plantsby studying two generations of self-fertilized families. As early as at the stage of the first selfing genera-tion, we observed reduction in the number of florets per capitulum. By the second selfing generation, weobserved reductions in germination rate, plant height, above-ground plant biomass, seed set and the finalnumber and mass of seeds per plant. In particular, dramatically lower germination rate and reduced seedset contributed to a low cumulative fitness index of the generations that resulted from selfing. Never-theless, although high average inbreeding depression was observed, large variation in cumulative fitnessamong families would allow some of these selfed families to persist and trigger evolution of selfing insmall, isolated populations." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Bellanger S., Guillemin J.-P., Touzeau S., Darmency H., 2012 - Variation of inbreeding depression in Centaurea cyanus L., a self-incompatible species. Flora, 212 : 24–29. |
| ID PMB : |
69099 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69099 |
in Flora > vol. 212 (Année 2012) . - pp. 24–29
[article]
|
Variation of inbreeding depression in Centaurea cyanus L., a self-incompatible species in Flora, vol. 212 (Année 2012)