Fern Davies Posted June 16, 2016 Share Posted June 16, 2016 Obituary in The Auk Elaina M. Tuttle, Ph.D., a professor at Indiana State University who was known for her long-term studies on White-throated Sparrows and Fairy-wrens passed away on 15 June 2016. Over her career, she examined how ecology, behavior, genetics, and physiology maintain natural variation through their influence on the evolution of life-history strategies, phenotypic expression, and both the relative fitness and frequency of genotypes within a population. Dr. Tuttle wasinvolved in two projects that investigate these factors: 1) a study of the maintenance of polymorphism via disassortative mating in the white-throated sparrow (Zonotrichia albicollis), and 2) a study of sexual selection and the evolution of mating systems in Australian fairy-wrens (Malurus splendens, M. lamberti, M. leucopterus) in collaboration with Stephen Pruett-Jones (University of Chicago) and Michael S. Webster (Washington State University). Dr. Tuttle, who earned her doctorate at SUNY Albany, utilized observational and experimental methods in the field and laboratory, molecular genetic techniques (e.g. minisatellite DNA fingerprinting, microsatellites, RAPDs, AFLPs), physiological techniques (e.g. semen sampling, hormonal analyses, and immunological analyses), and other multi-disciplinary techniques (e.g. karyotyping, histology). An integrative approach often reveals new alternative hypotheses and allowed her to investigate evolutionary questions at proximate and ultimate levels. Dr. Tuttle had a general interest in population genetics, the nature and organization of genetic variation in populations, and how genetic diversity affects the conservation of species. She collaborated on several such research projects on a variety of organisms ranging from mammals to insects. Earlier this year, Dr. Tuttle published a paper in Current Biology reporting on the achievements of her 27-year collaboration with Rusty Gonser (her husband, also Indiana State University) into white-throated sparrows at Cranberry Lake in New York. Their efforts have led to greater understanding of the birds' supergene, its apparent degradation and the species' evolution. She called it her pinnacle paper and said that "I think of all the researchers throughout the years, all the field assistants and graduate assistants who have been collaborators. It's nice because even though they may not be in authorship, a little part of them is in there." She added: "Typically, researchers have genomics data or they have field data. "You don't often have both integrated into a nice story together." And that field data dates back nearly three decades. "We can go back in history and do the genomics from samples from 1988 and see how genes change over time. It's a really rich database," she said. Until genome sequencing capabilities caught up with Tuttle, she says it was like having a black box that needed to be unlocked. "I knew there were secrets in there, and we're just beginning to see," she said. "Now, the data can be mined by us and other researchers because it's on a public database." As questions are answered, even more are asked. "I'm excited. There's so many other things we can find out—how genes arise, how they're maintained, how they work," she said. "We're even thinking about doing epigenetics, which is how genes are turned on or off. One of the future projects we're looking at is how stress turns on certain genes. That's a big thing in human disease, as well. Stress turns on certain genes that cause disease later in life. It's a good model for human behavior as well." Read more at: http://phys.org/news/2016-02-genetic-secrets-birds-behavior-evolution.html#jCp Elaina M. Tuttle et al. Divergence and Functional Degradation of a Sex Chromosome-like Supergene, Current Biology (2016). DOI: 10.1016/j.cub.2015.11.069 Read more at: http://phys.org/news/2016-02-genetic-secrets-birds-behavior-evolution.html#jCp Dr. Tuttle was a member of the American Ornithologists' Union and the Wilson Ornithological Society. Link to comment Share on other sites More sharing options...
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