I've never seen this before
 

I've been growing tomato plants from seed for 8 or 9 years, and the plants have always had a two leaf cotyledon. This year, as my seeds begin to germinate, I have a tomato plant with a three leaf cotyledon. Will this tomato plant be normal or should I plan on not using it as a transplant?

It could be infertile, with 3 sets of chromosomes instead of 2
in its cells. Or it could be a mutation that only affects the
cotyledons themselves, and the rest of the plant will be
a normal tomato plant.

I grew out a tricot Moskvich plant one time. It grew to
be a normal tomato plant, with normal Moskvich fruit.

[quote=Mark0820;202874]I've been growing tomato plants from seed for 8 or 9 years, and the plants have always had a two leaf cotyledon. This year, as my seeds begin to germinate, I have a tomato plant with a three leaf cotyledon. Will this tomato plant be normal or should I plan on not using it as a transplant?[/quote]

[URL]http://tomatoville.com/search.php?searchid=687229[/URL]

Mark, the above is a general search for tricots and there's lots of good information there, you'll even find a thread about a quadcot, as it were.

There's some genetics involved as well, but I think that's covered in several of the threads I just liked to.

Hope that helps.

I'm glad you posted this!! Just in the past couple days I've had a three-leaved Turkish Orange Eggplant coming up and wondered what it was all about. Until today I was unfamiliar with the term "cotyledon", so I had trouble looking up information :P I feel more confident about letting it grow and seeing what comes!