… and the various ancillary features - to have been selected in the … We first examine the
evidence that heterostyly promotes … selection models that compare the ability of selection against …

… techniques for the study of plant adaptation. The diversity of approaches used to study
heterostyly are reflected in the topics covered in this volume written by leading authorities in …

… In this paper, we consider the nature of the flowers of the … to heterostylous descendants
and we discuss the evolutionary … that the primary selection force responsible for both the self-…

… Following this scenario, once incompatibility becomes established, style- and stamen-length
mutants linked to the incompatibility locus are selected, because they favour compatible …

… pollen production, and pollen storage products may have been selected to offset the effects
of asymmetric pollen flow among forms, and/or to compensate for differences in style length. …

… theoretical models on the selection of heterostyly (Section III). … the molecular genetic
architecture of heterostyly and efforts to identify and characterize the genes controlling heterostylous …

… complex of genes that we can reasonably postulate is one of mutations of several genes
accumulated by selection and assembled by recombination, but in its final form is contained …

… extent of floral dimorphism are presumably correlated with the intensity of selection for
outbreeding. Thus all degrees of expression would be found in various species in which …

… Presumably, thc diversity in expression of floral polymorphisms among heterostylous taxa
reflects contrasting selection pressures imposed by different pollinator groups, as well as …

… Ifdistances of a few mm are all that separate stigmas and anthers within heterostylous flowers,
selection must severely limit variation in sex organ level both within and between flowers …