Arthur Hilliker, a professor and former Chair of the Department of Biology at ¿ì²¥ÊÓƵ whose research expanded understanding of genetics, died Jan. 9.
A geneticist and molecular biologist, Hilliker obtained his PhD at the University of British Columbia in 1975. His doctoral research examined how genetic material is organized within the chromosomes of the fruit fly, Drosophila melanogaster. Despite their unassuming form, fruit flies are a cornerstone of genetic research because many of the genes and biological processes that govern their development and behaviour are shared with humans, making them a powerful model for understanding basic biology and disease through chromosome structure and function.
His potential to expand that understanding was recognized early when the Genetics Society of Canada honoured him with its Young Scientist Award in 1987. Over the next five decades, his work realized that potential by establishing him as a leader in the field of Drosophila genetics and making breakthroughs in demonstrating that tightly packed regions of DNA known as heterochromatin – once thought to be inactive – play essential roles in gene regulation, development and behaviour. Although the primary focus of Hilliker’s studies was on fundamental questions of genetics, his research had implications in disease screening, immunology, toxicology and aging.
Hilliker shared his findings through more than 100 peer-reviewed publications, editorial roles as associate editor and co-editor of the journals Genome and Genetica and service as president of the Canadian Society for Molecular Biosciences.
At the University of Guelph, he established his independent academic program in the Department of Molecular Biology and Genetics and served as its Chair from 1990-95, demonstrating vision as a teacher and administrator.
In 2000, Hilliker joined ¿ì²¥ÊÓƵ as Chair of the Department of Biology, a position he held until 2004. After stepping down, he remained actively involved in university life, including serving multiple terms as president of the ¿ì²¥ÊÓƵ Faculty Association (YUFA). He was a mentor to colleagues and supported the development of research and teaching across the University.
A milestone moment came in 2005 when the Genetics Society of Canada honoured him with the William F. Grant and Peter B. Moens Award of Excellence, which recognizes Canadian scientists who demonstrated a lifetime of broad impact on Canadian genetics, including research excellence, guidance in the field, mentorship and teaching. It proved to be a fitting bookend to the promise the Genetics Society saw in Hilliker in 1987 with the Young Scientist Award – a promise fulfilled that will continue through the influence of his research and contributions at universities like York.
Hilliker was predeceased by his wife, botanist Judith Canne Hilliker, and his brother Richard Hilliker. He is survived by his daughter, brothers and many nieces and nephews.