Abstract
The relationship between individual heretozygosity and fitness was explored in the perennial larkspur Delphinium bolosii (Ranunculaceae), an endangered species endemic to Catalonia (North-Eastern Spain), as a part of several studies prior to designing a programme for the reintroduction of this species in a locality where it has been extinct for approximately one century. Allozyme electrophoresis was used to quantify the levels of heterozygosity at nearly to one hundred surveyed individuals in two extant populations. At the same time, eight parameters of vegetative and reproductive fitness were measured. A principal component analysis reduced the original fitness variables to three uncorrelated principal components, two associated with the maternal plant and the other one with the offspring. However, none of the components were significantly correlated with heterozygosity. The low number of variable allozyme markers and the likely influence of ecological factors could be responsible for the lack of correlation between individual heterozygosity and fitness.
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