Biological Sciences

Events and seminars

Genetic analysis of a narrow flower colour hybrid zone

Nick Barton (IST Austria)

3rd November 2021 at 2:00pm [Download iCalendar / .ics file]

Online, Online

The snapdragon Antirrhinum majus includes populations with distinct flower colours, which meet in the Pyrenees. In joint work with David Field (Perth), we have made an intensive study of a narrow hybrid zone that separates yellow from magenta flowers.  Pooled sequence data shows that selection likely acts on just a few genes involved with flower colour, and prevents gene flow only across a very small region of genome. Selection and gene flow can be estimated indirectly, from cline shape and from linkage disequilibrium, and also from individual relationships, determined by SNP genotyping. This study shows how a variety of techniques can be combined to understand a striking natural phenomenon.

Host Brian Charlesworth

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