Hi Elizabeth -
I'm not qualified to answer your F1 question (without some research)... but
I can point you to an excellent pecan blog I follow that should help answer
some of your questions. It's written by William Reid, Pecan Research &
Extension Specialist for Kansas and Missouri. Bill is overseeing a pecan
breeding plot raising controlled cross pecan seedlings. In particular, take
a look at Bill's 10/13 and 10/8 posts for info on nut feature variability.
Here's the blog: http://northernpecans.blogspot.com/
HTH!
Pete Chrisbacher
southeast PA
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