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Inbreeding depression in a rare plant, Scabiosa canescens (Dipsacaceae)

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Author

Summary, in English

Plants from a population of Scabiosa canescens, a locally rare species with a narrow ecological amplitude, were raised under uniform growth conditions to examine the phenotypic effects of one generation selfing and outcrossing. Particular attention was given to direct components of fitness (seedling biomass, rosette leaf number, head number, flower number per head), but two morphological characters (plant height, flower size) were also considered. Estimates of inbreeding depression (delta), adjusted for maternal effects and lack of balance, were compared and tested for significance using randomization and bootstrap procedures. Inbreeding significantly depressed several characters during both early and late stages of the life cycle, with delta ranging from 0.14 (flower size) to 0.37 (seedling biomass). Based on these and other results, we propose that S. canescens is susceptible to inbreeding and that the genetic basis of inbreeding depression varies across life stages.

Department/s

Publishing year

2002

Language

English

Pages

207-211

Publication/Series

Hereditas

Volume

136

Issue

3

Document type

Journal article

Publisher

Wiley-Blackwell

Topic

  • Genetics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1601-5223