INFIVE   05416
INSTITUTO DE FISIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Natural phenological variation in aspen (Populus tremula): the SwAsp collection.
Autor/es:
LUQUEZ VIRGINIA; HALL DAVID; ALBRECTSEN BENEDICTE; KARLSSON JAN; INGVARSSON PÄR; JANSSON STEFAN
Revista:
Tree Genetics & Genomes
Referencias:
Año: 2008 vol. 4 p. 279 - 292
ISSN:
1614-2942
Resumen:
Abstract.
The genus Populus is currently the main model
system for genetic, genomic and physiological research in trees. Phenotypic
variation in aspen (Populus tremula) populations growing in
different environments across Sweden is expected to reflect genetic
variation that is important for local adaptation. To analyze such natural
phenotypic and genetic variation the Swedish Aspen (SwAsp) Collection was established. Trees were taken from
12 different populations across Sweden, from 56° to 66° latitude north and
planted in two common gardens in Ekebo (55.9 ° N) and Sävar (63.4 ° N). Data
related to phenological and growth traits were collected during the second year
of growth. Some traits like the date of bud set and leaf area duration showed
strong clinal variation patterns with latitude in both field trials, but the
date of bud flush did not change along a latitudinal cline. The phenological
traits showed moderate within populations heritabilities, although growth
traits showed weaker clinal patterns and lower heritability values than the
phenological traits.
This research forms
the starting point for the development of the SwAsp collection, a resource
facilitating analysis of the natural genetic variation in aspen, the
elucidation of the structure and dynamics of aspen populations and the future
identification of the genes controlling adaptive traits using association
mapping of selected candidate genes.