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Post by gambo on Sept 11, 2023 9:02:21 GMT -5
Hey all! I'm interested in converting a population of bicolor Tuxpeno and a population of Silver King Dent corn to a uniform orange/yellow semi-dent by crossing each of them with a Cateto population, but in my experience there always seems to be a hint of white that is maintained on subsequent generations after such a cross. As such, I'm wondering if anyone here could provide me with some tips/methods on how to fully convert these populations?
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Post by reed on Nov 10, 2023 11:08:54 GMT -5
White is genetically recessive. If both parents contribute yellow, the seed will of course be yellow. If one contributes yellow and the other white, the seed will still be yellow. Only if both are white do you get white. Because of that white can hide for generations, waiting for that random chance where it matches up from both parents. If a single kernel on an ear is white it tells you that the mother plant has the recessive white, and all kernels on all cobs of that plant carry the recessive gene but just that one kernel also inherited white from the father.
It's easy to breed for just white because you know white kernels do not have any secrete yellow genes lurking around unseen, but getting white out of yellow is a bit trickier. All you can do is decrease the probability of it by culling entire ears whenever a white kernel shows up. By starting with a bi-color and an all-white variety I expect it will take quite a lot of time and patience to completely eliminate it.
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