Share This Author
Polyploid speciation, in which the entire genome is duplicated, is particularly frequent in plants, perhaps because polyploid plants often exhibit ecological differentiation, local dispersal, high fecundity, perennial life history, and self-fertilization or asexual reproduction.
Chromosomal rearrangements and speciation.
- L. Rieseberg
- BiologyTrends in ecology & evolution
- 1 July 2001
Hybrid Origins of Plant Species
- L. Rieseberg
- 1 November 1997
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.
Transgressive segregation, adaptation and speciation
Credence is lent to the view that hybridization may provide the raw material for rapid adaptation and provide a simple explanation for niche divergence and phenotypic novelty often associated with hybrid lineages.
Major Ecological Transitions in Wild Sunflowers Facilitated by Hybridization
The same combinations of parental chromosomal segments required to generate extreme phenotypes in synthetic hybrids also occurred in ancient hybrids, and this possibility was tested through phenotypic and genomic comparisons of ancient and synthetic hybrids.
- P. Taberlet, E. Coissac, Mehrdad Hajibabaei, L. Rieseberg
- Environmental ScienceMolecular ecology
- 1 April 2012
This paper presents a new probabilistic procedure called “spot-spot analysis” that allows for direct measurement of the response of the immune system to E.coli.
The frequency of polyploid speciation in vascular plants
- T. Wood, N. Takebayashi, Michael S. Barker, I. Mayrose, Philip B. Greenspoon, L. Rieseberg
- BiologyProceedings of the National Academy of Sciences
- 18 August 2009
It is established that 15% of angiosperm and 31% of fern speciation events are accompanied by ploidy increase, and frequency estimates are higher by a factor of four than earlier estimates and lead to a standing incidence of polyploid species within genera of 35% (n = 1,506).
Hybrid zones and the genetic architecture of a barrier to gene flow between two sunflower species.
The utility of hybrid zones for identifying factors contributing to isolation and the prediction of increased resolution relative to controlled crosses are demonstrated and verified.
Multiple paleopolyploidizations during the evolution of the Compositae reveal parallel patterns of duplicate gene retention after millions of years.
It is suggested that paleopolyploidy can yield strikingly consistent signatures of gene retention in plant genomes despite extensive lineage radiations and recurrent genome duplications but that these patterns vary substantially among higher taxonomic categories.
How species evolve collectively: implications of gene flow and selection for the spread of advantageous alleles
A literature review of FST values for a broad range of taxa suggests that gene flow in many taxa is considerably greater than suspected from earlier studies and often is sufficiently high to homogenize even neutral alleles.