This paper is concerned with a study of the
inheritance of a type of reaction in the potato plants
following infection -by certain viruses.
The evidence presented herein seems to offer
a sound basis from which further incursions into potato
genetics may be made with some measure of confidence.
The majority of characters in the cultivated potato
such as leaf shape, pubescence, tuber shape, time of
maturity are quantitative in their expression and
unsuitable for straightforward genetical analysis.
With the simplified biochemical methods now available,
however, it should be possible to analyse the inheritance of tuber colour and most probably other discontinuous characters are to be looked for among the
wild South American potatoes. The possibilities of
the present material are by no means exhausted and
many aspects remain to be worked out. Additionally
it is hoped that an examination of the distribution
of the lethal necrotic genes among the South American
material may lead to interesting results.