Open AccessFitness‐related traits of allozyme genotypes in Bromus hordeaceus L. (Poaceae) associated with field habitat and experimental flooding
Author(s) -
Lönn Mikael,
Sandberg Anna,
RedboTorstensson Peter
Publication year - 1998
Publication title -
biological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.906
H-Index - 112
eISSN - 1095-8312
pISSN - 0024-4066
DOI - 10.1111/j.1095-8312.1998.tb01541.x
Subject(s) - biology , allele , poaceae , genotype , phenotypic plasticity , dry weight , genetic variation , botany , agronomy , ecology , genetics , gene
Genetic variation at alcohol dehydrogenase and phosphoglucose isomerase loci in Bromus hordeaceus has in an earlier study been found to show substantial microgeographic spatial structuring. The present study reports differences in fitness related characters between the enzyme genotypes, both from a field study and a greenhouse experiment. The field study showed overall differences in seed set between allozyme genotypes and also that Pgi‐1b genotypes differed in number of seeds set at different levels of herb cover in their habitat. In the greenhouse, dry, normal or flooded conditions were applied. Seeds from individuals with the Adh‐1b‐11 genotype matured faster in the dry and slower in the flooded treatments than did seeds from individuals with the Adh‐1b‐22 genotype. Individuals containing Pgi‐1b‐1f1f alleles and Adh‐1b‐11 alleles are more plastic than individuals with other allele combinations, meaning that allozyme variation could partly explain what could be seen as adaptive phenotypic plasticity. Mean seed weight was different between dry and flooding treatments for Pgi‐1b genotypes. There were also direct effects of allozyme genotype on the probability of survival, total plant weight, weight of reproductive parts, seed weight, days to seed maturation and the percentage of reproductive parts out of the total plant weight.