Transgressive segregation, adaptation and speciation

@article{Rieseberg1999TransgressiveSA,
  title={Transgressive segregation, adaptation and speciation},
  author={Loren H. Rieseberg and Margaret A. Archer and Robert K. Wayne},
  journal={Heredity},
  year={1999},
  volume={83},
  pages={363-372}
}
The production of extreme or ‘transgressive’ phenotypes in segregating hybrid populations has been speculated to contribute to niche divergence of hybrid lineages. Here, we assess the frequency of transgressive segregation in hybrid populations, describe its genetic basis and discuss the factors that best predict its occurrence. From a survey of 171 studies that report phenotypic variation in segregating hybrid populations, we show that transgression is the rule rather than the exception. In… 
View on Springer
nature.com
1,019 Citations
Highly Influential Citations
74
Background Citations
542
Methods Citations
11
Results Citations
20

1,019 Citations

Citation Type

Citation Type

The genetic architecture necessary for transgressive segregation is common in both natural and domesticated populations.
TLDR
The results indicate that transgressive segregation provides a general mechanism for the production of extreme phenotypes at both above and below the species level and testify to the possible creative part of hybridization in adaptive evolution and speciation.
Genetic Distance between Species Predicts Novel Trait Expression in their Hybrids
TLDR
The analysis demonstrates that the potential impact hybridization may have on phenotypic evolution is predictable from the genetic distance between species.
Hybridization, transgressive segregation and evolution of new genetic systems inDrosophila
TLDR
The impact of hybridization, followed by introgression and transgressive segregation, on chromosomal constitution and karyotypes, some fitness parameters, isozymes, components of mating behaviour and mating preference reveals a complex pattern of interracial divergence among parental species and cytoraces.
Variable patterns of introgression in two sculpin hybrid zones suggest that genomic isolation differs among populations
TLDR
Despite the similarity of the two hybrid zones in their overall genomic composition, patterns observed at individual loci show little correlation between zones and many fit different genotypic models of fitness, it remains difficult to determine whether these results are due to differences in external selection pressures or cryptic genetic differentiation of distinct parental populations.
GENETIC ARCHITECTURE SETS LIMITS ON TRANSGRESSIVE SEGREGATION IN HYBRID CICHLID FISHES
TLDR
It is shown that the genetic architecture of the cichlid jaw limits transgression, whereas the genetic basis of skull shape is permissive of transgressive segregation, which suggests that natural selection will limit the degree of diversity that may be achieved via hybridization.
Genetic basis of transgressive segregation in rice heading phenotypes
TLDR
It is demonstrated that genome-wide SNP analysis facilitated detection of genetic loci associated with the extreme phenotypes and revealed that the transgressive phenotypes were produced by exchanging complementary alleles of a few minor QTLs in the similar parental genotypes.
Genetic Properties Responsible for the Transgressive Segregation of Days to Heading in Rice
TLDR
A genome-wide SNP analysis facilitated the detection of genetic loci associated with extreme DTH phenotypes, and revealed that the transgressive phenotypes were produced by exchanging the complementary alleles of a few minor QTL in the similar parental phenotypes.
Hybridization Outcomes Have Strong Genomic and Environmental Contingencies
TLDR
Significant effects of hybrid cross, test environment, and cross × environment interactions suggest that the amount of transgression produced in a hybrid cross is highly context specific and that outcomes of hybridization differ even among crosses made from the same two parents.
Introgressive hybridization and morphological transgression in the contact zone between two Mediterranean Solea species
TLDR
The morphological variation patterns associated with introgressive hybridization between two species of sole, Solea senegalensis and Solea aegyptiaca, are investigated to document the building of reproductive isolation and the possible emergence of transgressive phenotypes that can be a source of evolutionary novelties.
Phenotypic novelty in experimental hybrids is predicted by the genetic distance between species of cichlid fish
TLDR
The commonness and ease with which novel phenotypes are produced in cichlid hybrids between unrelated species has important implications for the interaction of hybridization with adaptation and speciation.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 40 REFERENCES
The role of hybridization in evolution
TLDR
Fisher’s model of stabilizing selection on multiple traits, under which reproductive isolation evolves as a side‐effect of adaptation in allopatry, confirms a priori arguments that while recombinant hybrids are less fit on average, some gene combinations may be fitter than the parents, even in the parental environment.
The Relationship of Heterosis and Genetic Divergence in Maize.
TLDR
The issue in this report is whether or not heterosis in maize continues to in- crease at higher levels of diversity.
QTL analysis of transgressive segregation in an interspecific tomato cross.
TLDR
Results from this research reveal the basis of wide-cross transgressive segregation, demonstrate that molecular markers can be used to identify QTL (from wild species) responsible for transgressive phenotypes and to selectively transfer them into crop species and improve many traits of economic importance.
Genetic architecture of species differences in annual sunflowers: implications for adaptive trait introgression.
TLDR
The genomic location of quantitative trait loci associated with pollen sterility and morphological traits distinguishing two annual sunflowers, Helianthus annuus and H. cucumerifolius, is examined to recover the phenotype of ssp.
The role of hybridization and introgression in the diversification of animals
TLDR
The significance of introgressive hybridization in evolution and diversification of animals is reconsidered to determine if the generally negative assessment of these processes is warranted.
Hybrid Origins of Plant Species
TLDR
Experimental, theoretical, and empirical studies of homoploid hybrid speciation suggest that it is feasible, although evolutionary conditions are stringent, and hybridization may be important as a stimulus for the genetic or chromosomal reorganization envisioned in founder effect and saltational models of speciation.
Genetic Diversity and Heterosis of Spring Wheat Crosses
TLDR
expression of greater-than-average heterosis by the highest yielding bulks, without an increase in genetic distance, suggested additional factors were influencing the expression of heterosis, which seems to be due to parental diversity.
Pattern and process in a narrow hybrid zone
TLDR
Examination of variation in morphology and allozymes in a hybrid zone between two closely related eastern North American species of field cricket shows that patterns of variation across the zone do not conform to a simple model of monotonie clinal variation, and there is strong evidence for differential and asymmetric introgression.
Novel Variation in Tomato Species Hybrids
TLDR
Several novel variants that appeared in F2 populations of hybrids between L. esculentum and the self-incompatible species L. peruvianum and L. chilense are described, indicating the action of a single recessive gene, og, of major effect.
QUANTITATIVE GENETIC ANALYSIS OF DIVERGENCE IN MALE SECONDARY SEXUAL TRAITS BETWEEN DROSOPHILA SIMULANS AND DROSOPHILA MAURITIANA
TLDR
There was substantial evidence for nonadditive effects, since the magnitude of estimates often differed significantly between the two backcrosses, and several similarities were found between different traits in the estimated positions of QTL, suggesting that pleiotropy and/or linkage ofQTL may have been important in the evolution of these traits.
...
1
2
3
4
...