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The utility of amplified fragment length polymorphisms in phylogenetics: a comparison of homology within and between genomes.
It is concluded that AFLP data are best suited for examining phylogeographic patterns within species and among very recently diverged species.
PLANT POLYPLOIDY AND POLLINATION: FLORAL TRAITS AND INSECT VISITS TO DIPLOID AND TETRAPLOID HEUCHERA GROSSULARIIFOLIA
- K. A. Segraves, J. N. Thompson
- Biology, MedicineEvolution; international journal of organic…
- 1 August 1999
The results suggest that the process of polyploidization creates the potential for attraction of different suites of floral visitors among genetically similar diploid and autotetraploid populations.
Pattern and timing of diversification in Yucca (Agavaceae): specialized pollination does not escalate rates of diversification
- Christopher I. Smith, O. Pellmyr, D. M. Althoff, M. Balcázar-Lara, J. Leebens-Mack, K. A. Segraves
- Biology, MedicineProceedings of the Royal Society B: Biological…
- 7 February 2008
The results indicate that the pollination mutualism did not accelerate diversification, as Yucca diversity is not significantly greater than that of its non-moth-pollinated sister group, Agave sensu latissimus, and corroborate the suggestion that the plant–moth pollination Mutualism has at least two origins within the Agavaceae.
Plant Polyploidy and Insect/Plant Interactions
- J. N. Thompson, B. M. Cunningham, K. A. Segraves, D. M. Althoff, D. Wagner
- Biology, MedicineThe American Naturalist
- 1 December 1997
Plant polyploidy provides a potential route out of specialization as an evolutionary dead end in phytophagous insect taxa as well as a potentially important route to subsequent phylogenetic and geographic diversification of plant/insect interactions.
Evidence for shared broad-scale climatic niches of diploid and polyploid plants.
Despite expectations of frequent niche shifts, evidence is shown for alternative patterns, such as niche conservatism and contraction, rather than a prevalent pattern of niche shifts that may help polyploid persistence in the long term.
Testing for coevolutionary diversification: linking pattern with process.
- D. M. Althoff, K. A. Segraves, Marc T. J. Johnson
- Biology, MedicineTrends in ecology & evolution
- 1 February 2014
This review highlights potential mechanisms of coevolutionary diversification, outline approaches to examine this process across temporal scales, and proposes a set of minimal requirements for demonstrating coevolved diversification.
Multiple origins of polyploidy and the geographic structure of Heuchera grossulariifolia
It is concluded that the recurrent formation of polyploids is an important evolutionary mechanism in the diversification of H. grossulariifolia and has several possible explanations, including small sample sizes, extinction of parental diploid haplotypes, chloroplast introgression, and homoplasy in the cpDNA sequence data.
Geographic isolation trumps coevolution as a driver of yucca and yucca moth diversification.
- D. M. Althoff, K. A. Segraves, Christopher I. Smith, J. Leebens-Mack, O. Pellmyr
- Biology, MedicineMolecular phylogenetics and evolution
- 1 March 2012
It is concluded that biogeographic factors are the overriding force in plant and pollinator moth speciation and significant phylogenetic congruence between the moth and plant lineages is likely due to shared biogeography rather than coevolution.
Female reproductive tract form drives the evolution of complex sperm morphology
- Dawn M. Higginson, K. Miller, K. A. Segraves, S. Pitnick
- Biology, MedicineProceedings of the National Academy of Sciences
- 7 February 2012
Results of Bayesian analyses suggest that the loss of sperm conjugation is driven by elongation of the female reproductive tract, and underscore the importance of postcopulatory sexual selection as an agent of diversification.
The effects of genome duplications in a community context.
- K. A. Segraves
- Biology, MedicineThe New phytologist
- 1 July 2017
A number of mechanisms for how WGD could alter community context and how the emergence of polyploids in populations could also alter the community context of parental diploids and other plant species are proposed.