The contingency Chi-squares indicated good homogeneity among the several families
of each cross. The transmission of singed was quite variable; most families showed
no significant variation from the expected 25% while a few had as low as 18-19%
singed plants. Classification in all cases was excellent. Three-point tests with
wv-2 and lut are in progress.
PART II
STOCK LIST
STOCKS AVAILABLE
Source C. M. Rick
Name and Description
New accessions of tomato species. From our 1974 collections of L.
pimpinellifolium from coastal Peru, we have increased seed stocks of 29 accessions,
which are available to interested investigators. The most interesting of these are
the ones from the north coast region, particularly Depts. La Libertad and
Lambayeque, where the species is remarkably variable. The populations sampled are
polymorphic at most isozyme loci tested and register up to 20% heterozygosity.
Outcrossing in the wild grades up to a maximum 40%; in fact, they are so highly
cross-pollinated at Davis that we cannot increase them safely in the field without
spatial isolation. We have therefore resorted to hand selfing in large population
samples grown in the greenhouse. Tests for resistance or other characters should
therefore be made on a fair number of individuals.
We also have increased seed stocks of certain L. cheesmanii, chmielewskii,
hirsutum, peruvianum, and parviflorum collected by Dr. Miguel Holle and us in 1970-
71 and more recently.
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