Government practices, such as censorship and trade restrictions, that are institutional components of coadapted
ideological complexes heavily influence the spread of ideas in society in favor of the survival of their co-ideas in the complexes.
Therefore, adaptation to different local conditions could be one reason for the comparatively low heterosis values, and could be explained through coadapted
genes, at many loci, interacting in an epistatic manner.
Cooperative Coevolution: An Architecture for Evolving Coadapted
If stabilizing selection causes sexual traits to be well coadapted
within species, then low variation and low asymmetry is expected within species, because any deviation from the norm becomes detrimental.
A challenge for coevolutionary studies is to determine whether traits that result in coordinated dispersal are a general and ancestral feature of associations thought to be strongly coadapted
Outbreeding depression is a decrease in fitness of progeny upon breakup of coadapted
gene complexes resulting from mating of distantly related individuals (Dobzhansky 1937).
These advantages probably were acquired by generation of new coadapted
gene complexes in the Rb chromosomes (Theiler et al.
This core also preserves the coadapted
gene complexes represented in the entire collection (Upadhyaya et al.
genes determining parental traits would be broken-up by the hybridization, especially in advanced generations of hybrids (complex backcrosses).
Despite areas of hybridization, the abrupt discontinuity between the species, both in song and genetics, indicates that selection acts to maintain coadapted
gene complexes in the two species.
This clearly suggests that the coadapted
gene complexes controlling these associations were properly sampled and that the selection of this core collection was adequate in this regard.
The coadaptation hypothesis predicts that FA arises from the disruption of coadapted
gene complexes, which occurs in response to hybridization, and as a result hybrids should have higher fluctuating asymmetry (Clarke 1993).