Fred Pritchard's name I know well and also Loran Blood's name as two of many who mainly in the 20's toearly 30's studied the basic traits of tomatoes since back then there were no DNA tests and more sophisticated methods of doing so.
Here's Marglobe from Tania
http://tatianastomatobase.com/wiki/Marglobe
And here's a link to a great site from 1927,scroll down to tomatoes,which I have posted many times here and elsewhere on the difference between fibrous and tap root structures.
http://soilandhealth.org/wp-content/...010137toc.html
There were many early breeders such as Blood and Livingston and Pritchard, and they had goals in mind when they crossed tomatoes, and made selections to get what they wanted or close to it.
Carolyn