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Department of Biology



Dr. Noland Martin

Noland H. Martin, Ph.D.

Assistant Professor

Phone: 512-245-3317
Fax: 512-245-8713
E-mail:nm14@txstate.edu
Office: SUPP 160

Department of Biology
Texas State University - San Marcos
601 University Drive
San Marcos, TX 78666


Courses Taught

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Research Interest

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I am interested in speciation and natural hybridization. How are populations transformed into new species? What are the evolutionary consequences of natural hybridization? These are two of the most fundamental and interrelated questions in evolutionary biology, and with new ecological, molecular, and statistical genomic techniques, answering them is becoming a possibility. The evolution of new species is generally thought to be a consequence of genetic divergence between populations ultimately resulting in complete reproductive isolation. However, reproductive isolation is often incomplete and hybridization may occur between genetically divergent taxa. While the mere existence of hybrids often fuels debate as to the usefulness of long- standing species concepts, I believe that naturally hybridizing taxa provide unique opportunities to study speciation "as it happens" before the process has been completed. To understand hybridization and speciation in both a genetic and ecological context, I use large-scale field studies, greenhouse experiments, and genomic analyses in two naturally hybridizing flowering plant species-pairs; Mimulus guttatus / Mimulus nasutus and Iris fulva / Iris brevicaulis. Evolutionary biology requires the integration of such diverse types of data, and my research program illustrates the potential for using these data to ask a broad range of questions about the origin of species and the long-term consequences of natural hybridization. I am currently seeking enthusiastic Masters and PhD students to join my lab.


Recent Publications

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  • Arnold, M.L., Y. Sapir, and N.H. Martin 2008. Genetic exchange and the origin of adaptations: prokaryotes to primates. Philosophical Transactions of the Royal Society B. doi:10.1098/rstb.2008.0021 Published online.
  • [PDF] Sweigart, A.L., N.H. Martin and J.H. Willis 2008. Patterns of nucleotide variation and reproductive isolation between a Mimulus allotetraploid and its progenitor species. Molecular Ecology 17: 2089-2100.
  • [PDF] Arnold, M.L., R.S. Cornman and N.H. Martin 2008. Hybridization, hybrid fitness and the evolution of adaptations. Plant Biosystems 142: 166-171.
  • [PDF] Martin, N.H., Y. Sapir and M.L. Arnold 2008. The genetic architecture of reproductive isolation in Louisiana Irises: pollination syndromes and pollinator preferences. Evolution 62: 740-752.
  • [PDF] Martin, N.H., A.C. Bouck and M.L. Arnold 2007. The genetic architecture of reproductive isolation in Louisiana Irises: flowering phenology. Genetics 175: 1803-1812.
  • [PDF] Martin, N.H. and J.H. Willis 2007. Ecological divergence associated with mating system causes nearly complete reproductive isolation between sympatric Mimulus species. Evolution 61: 68-82.
  • [PDF] Martin, N.H., A.C. Bouck and M.L. Arnold 2006. Detecting adaptive trait introgression between Iris fulva and I. brevicaulis in highly selective field conditions. Genetics 172: 2481-2489.
  • [PDF] Martin, N.H., A.C. Bouck and M.L. Arnold 2005. Loci affecting long-term hybrid survivability in Louisiana Irises: implications for reproductive isolation and introgression. Evolution 59: 2116-2124.
  • [PDF] Martin, N.H. 2004. Flower size preferences of the honeybee (Apis mellifera) foraging on Mimulus guttatus (Scrophulariaceae). Evolutionary Ecology Research 6: 777-782.


Education

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Ph.D. 2004 Biology Duke University
M.S. 2000 Biology University of Oregon
B.S. 1996 Biology University of Texas at Austin

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