Long-term Sabbatical

The History and Consequences of Self-incompatibility in Flowering Plants

PI(s): Boris Igic (University of Illinois at Chicago)
Start Date: 15-Aug-2014
End Date: 15-Dec-2014
Keywords: database, empirical studies, mating systems, specialization, evolutionary novelty

This proposal aims to fund an unprecedented individual effort to deliver a collection of broadly desirable data. One of the major pursuits of evolutionary biology is the provision of a working theory that explains the generating processes behind the vastness of biodiversity. A natural starting point for such basic--yet seemingly intractable--problem is the observation that the rules of mating between individuals determine both the amount and distribution of genetic variation within species. Breeding systems influence diversification rates, shape the evolution of other traits. Consequently, they are crucial for meaningful comparative studies of the processes that influence plant diversification.

Self-incompatibility, the ability of individuals to recognize and reject their own pollen, is common in flowering plants. Inferences about its history and consequences are complicated by a trio of facts, seemingly at odds: (1) the existence of a single ancient and widespread mechanism (RNase/F-box system of nightshade, snapdragon, and rose families), (2) a multitude of distinct, non-homologous and independently evolved, mechanisms which enforce self-incompatibility, as well as (3) the spectacularly common loss of plant self-incompatibility within families, and indeed, the absence of self-incompatibility from many plant families.
I propose to use a vast existing personal collection of several thousand of records of breeding systems of flowering plants to construct a formal database, scoring this key trait, related traits, and primary reference information, all with the goal of generating a trusted and vetted, high-quality information, in the service of public scientific data access.