Welcome to the Internet Gene Mapping Lesson

You are presented with the problem of finding a molecular marker that is linked to gene controlling resistance to Phytophthora root rot in soybean. Fortunately, a population has already been developed from a cross of Harosoy and Williams that is segregating for this resistant gene. You will have seed of the parents and 46 F2 plants that you can classify for Phytophthora reaction, 2 RFLP markers, and 2 RAPD markers. After you have classified this population you will need to determine which marker(s) are linked to the resistance gene and how closely they are linked. There are five areas that we have set up for your use:

Greenhouse
Laboratory
Mapping Resources
Frequently Asked Questions