Transfer of self-incompatibility into L. esculentum from L.  chilense.<p>

Martin, F. W.<p>

In the first part of a proposed study, to determine the inheritance of
self-incompatibility in the genus Lycopersicon, particularly in crosses of
self-incompatible to self-fertile forms, an S allele was transferred by six
backcrosses from L. chilense to the L. esculentum variety Tiny Tim and in
other backcrosses to L. esculentum gene marker stocks.  In backcrosses to Tiny
Tim, ratios of approximately three self-fertile to one self-incompatible
occurred whereas in the other stocks, diverse ratios were obtained.  The
results suggest differences among self-fertile tomatoes of genes necessary for
the presence of self-incompatibility. It is proposed here that these
differences may have phylogenetic significance.  The above research
constitutes a portion of the work on self-incompatibility completed by the
author in his doctorate program. The full results will be published as soon as
possible.  Meanwhile, plans are being made to broaden the scope of the
research to other species of tomatoes in so far as time and future employment
permit.<p>

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