Mapping open-pollinated population?

[Biotechnology Lab]

Does anyone know if anyone is working on a situation where you have an
open-pollinated population from a known mother but the gametophyte is
not available?  All the progeny have been phenotyped for the trait of
interest in replicated trials.  There are several half-sib populations
available.  Any comments on trying to find a marker for a single gene
recessive trait would be greatly appreciated.

Jeff Schnurr

U of I