New Zealand Journal of Botany
abstracts
Short
communication
Does
drought affect inbreeding depression in the autogamous species Convolvulus
chilensis (Convolvulaceae)?
Lorena
H. Suárez
Ernesto Gianoli*
Departamento de
Botánica
Universidad de Concepción
Casilla 160-C
Concepción, Chile
* Author for correspondence.
egianoli@udec.cl
Abstract Inbreeding
depression, the reduction in fitness of selfed progeny
relative to outcrossed progeny, may be affected by the environment. The
autogamous species Convolvulus
chilensis (Convolvulaceae)
occurs in habitats subject to drought, where seedling mortality is
important in population dynamics. We compared in a greenhouse the
performance of C. chilensis seedlings
originated from different pollen sources (own or exogenous) and grown
under different water availability treatments (regular or restricted
watering). We measured the following plant traits: number of leaves,
leaf area, internode length, stem length and diameter, shoot and root
biomass, and root:shoot ratio. Water availability affected leaf area,
shoot biomass, and stem diameter. There was no effect of pollen source
on seedling traits in either soil moisture treatment, and no
statistical interaction between pollen source and water availability
was detected. We found no evidence of inbreeding depression at the
seedling stage in C. chilensis
under regular or restricted watering.
Keywords Convolvulus
chilensis; Convolvulaceae;
breeding systems; inbreeding depression; autogamy; drought stress
B05024; Received 15 June 2005;
accepted 29 August 2005; Online publication date 26 September 2005
New Zealand Journal of Botany,
2005, Vol. 43: 825–829
0028–825X/05/4304–0825 © The Royal Society of New Zealand 2005
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