Dr. Nicole Valenzuela Department of Ecology, Evolution, and Organismal Biology
Iowa State University
251 Bessey Hall. Ames, IA 50011
RESEARCH OVERVIEW We are interested in studying how ecology affects the structure, function, and evolution of the genome and its role in the development and evolution of complex phenotypes. This helps us understand the evolution of biological diversity and how it responds to environmental change.
Dr. Valenzuela receives new NSF grant (IOS 1555999) to study the Evolution of Turtle Dosage Compensation
Sex determination and the birth and death of species. Ecology and Evolution 2016. PDF
Cytogenetic insights into the evolution of chromosomes and sex determination reveal striking homology of turtle sex chromosomes to amphibian autosomes. Cytogenetic and Genome Research 2016. PDF
Discovery of youngest sex chromosomes reveals first case of convergent co-option of ancestral autosomes in turtles. Chromosoma 2016. PDF
Physical mapping and refinement of the painted turtle genome (Chrysemys picta) inform amniote genome evolution and challenges turtle-bird chromosomal conservation. Genome Biology and Evolution 2015. PDF
GRADUATE AND POSTDOCTORAL POSITIONS Positions are available for individuals interested in evolutionary biology, sex determination, evo-devo, chromosome and genome evolution, or climate change. Click here for details.
Why do organisms vary so remarkably in the ways they produce males and females? Our work focuses on comparative evolutionary and ecological genomics related to the evolution of developmental pathways, particularly those that underlie the development of the sexual phenotype.
What are the causes and consequences of chromosome evolution? We are studying (a) the evolution of sex chromosomes and the genes they contain, plus (b) the genome rearrangements responsible for changes in diploid number across turtles and their association with transitions in sex determination.