I think this is my last link. I came up with, perhaps not more than I WANTED to know, but more than I had ENERGY to learn.
http://www.kdcomm.net/~tomato/...
http://kdcomm.net/~tomato/gene...
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Although this Scientific American article praises hybrid supermarket tomatoes over heirlooms (???!!!???), it has a few paragraphs about fruit shape. However, most of the article contradicts everything I know or have read about heirloom vs. mass-market tomatoes. If I owned a dozen supermarket chains and supplied hybrid seeds to agribusinesses, this is exactly the kind of article I would want to see printed. But it might be right about the "shape genes".
"... plucked a gene called SUN from one heirloom tomato and inserted it into a wild relative. As a result, the tiny fruits bulged like pears,
... another shape gene called OVATE... both seem to have been nurtured in Europe in the last several hundred years to ease mechanical harvesting and processing."
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I guess you would have to buy the book, but I saw one page while Goggling "tomato breeding fruit shapes"
http://books.google.com/books?...
page 80, "Genetics, genomics and Breeding of Tomatoes" $95 (or you can RENT it on Kindle)
http://www.amazon.com/gp/searc...
"fruit shape index"
"obovoid"
"ellipsoid"
rectangular, long, round, blocky, flat, oxheart, heart
"proximal end blockiness"
"proximal eccentricity"
"distal end protrusion"
"distal end angles"
"locule number"
See Table 3-1 for sure!
genes SUN, OVATE, FAS and LC are the four main "shape" genes in cultivated tomatoes.
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I downloaded this PDF since it has a ton of information about fruit shape, but it is pretty technical. Heavy reading ... maybe after I retire.
http://www.plantcell.org/conte...
http://www.plantcell.org/conte...
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This one is WAY too technical for me:
"The making of a bell pepper-shaped tomato fruit: identification of loci controlling fruit morphology in Yellow Stuffer tomato"
http://www.oardc.osu.edu/vande...
