Quote:
Originally Posted by Darren Abbey
This paper has some good discussion about tomato fruit shape genetics: http://www.plantphysiol.org/content/156/1/275.full.pdf. There are a number of genes involved in shape, but I suspect the 'sun' gene is responsible for the elongation and pointed shape in BGZ. FHGTC will have the dominant wild type allele only ('Sun/Sun'). 25% of your F2s should have the elongated trait.
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To get all three traits, multiple the probability of each separately: (gf/gf)(gs/gs)(Aft/Aft)(sun/sun) = (1.00)(1.00)(0.25)(0.25) = 0.0625
To calculate the number of plants you would expect to have to grow before you found one like you were looking for, invert the probability: 1/0.0625 = 16 |
Thank you for the link to that paper. Now I've got something to read tonight.
Your calculation agrees with what my admittedly basic understanding was telling me, and if I include a 12.5% factor for BGZ not being stable at F4 yet I can figure out the approximate size of an F2 grow out needed to find the desired results.
Now to go figure out my odds on the currant project!