Correlated effects of selection for flower size in Raphanus raphanistrum
2007 (English)In: Canadian Journal of Botany, ISSN 0008-4026, E-ISSN 1480-3305, Vol. 85, no 2, 160-166 p.Article in journal (Refereed) Published
The evolution of flower size may be constrained by trade-offs between flower size and other plant traits. The aim of this study was to determine how selection on flower size affects both reproductive and vegetative traits. Raphanus raphanistrum L. was used as the study species. Artificial selection for small and large petal size was carried out for two generations. We measured the realized heritability of flower size and recorded flower production, time to flowering, plant size, and seed production in the two selection lines. The realized heritability was h(2) = 0.49. Our study, therefore, showed that R. raphanistrum has potential for rapid evolutionary change of floral size. The lines with large flowers produced smaller seeds and started to flower later than the lines with small flowers. There was no trade-off between flower size and flower number, but the lines selected for large flower size had more flowers and a larger plant size than lines selected for small flowers. Estimates of restricted maximum likelihood (REML) analysis of pedigrees also showed that flower size had a positive genetic correlation with start of flowering and plant height.
Place, publisher, year, edition, pages
2007. Vol. 85, no 2, 160-166 p.
IdentifiersURN: urn:nbn:se:sh:diva-6042DOI: 10.1139/B07-007ISI: 000247094000005ScopusID: 2-s2.0-34250329579OAI: oai:DiVA.org:sh-6042DiVA: diva2:395496