[Andrey_BY]

Darrel,

yes, he has found only 1 tomato plant survived after a frost in this field, but you have to imagine that there was no a big diversity of tomato varieties that times in USSR

And I know he has started these experiments in late 1930s-1950s when they had not so many opportunities for a passionate amateur breeder in Soviet Union to grab any info about many things concerning genetics (except from old Russian Genetic books) or to use special methods. He was a common teacher at the school and his pupils often joined him in his passion.

Now you are fortunate to try many things (including access to other lines from another species) to get on a higher level and use your knowledges of modern genetics. I wish you good luck and will be glad to try your future samples of cold tolerant varieties.