Author Topic: Flint/Flour crossbreeding  (Read 463 times)

acxlll

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Flint/Flour crossbreeding
« on: 2020-10-14, 12:40:58 PM »
Hi,

I'm looking to start a corn landrace that will be able to mature in our short season and northern latitude in Latvia.
Actually - make it 2 landraces - flint and flour for different uses.
I want to throw a lot of genetics together and then select the best survivors over time.

The question now is - to mix flour and flint or not to mix them in the initial planting?

I know it is relatively easy to select for a recessive trait, just eliminate everything that shows the dominant trait and eventually you will have the recessive ones only. So flint, which as far as I know is recessive, will be easy to select.

However, I don't really know how to best separate the flour corn out of the mix. There will always be a small percentage that carries the recessive flint gene and when crossing with another carrier will make the flint trait appear. So no matter how many years I replant floury kernels only, I will still get some flint. Right?
Does anyone have any strategies for selecting for a dominant trait?

Am I setting myself up for a headache by mixing both types together? Would it be better to start with two separate populations right away? (although there is no guarantee that my initial flour corn seed will not have recessive flint genes hidden within)

reed

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Re: Flint/Flour crossbreeding
« Reply #1 on: 2020-11-03, 10:50:59 AM »
I'm doing something similar only I am selecting mine to be flint. I didn't know that flint was recessive so that is good for me. All I got to do is make my crosses and select the flint kernels. Are you sure abut that though? Seems to me that they are kind of quantative and can exist in varying amounts inthe same kernel.

As far as selecting for flour, assuming it is dominate is a problem cause if even one flint kernel shows up on an otherwise flour ear you know that the mother of that plant is carrying the flint so all of the other kernels are too. Only thing I can think to do is grow as large a population as you can and look for ears that have no flint kernels at all. Still I imagine you could be chasing the flint for a log time. 

Joseph Lofthouse

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Re: Flint/Flour crossbreeding
« Reply #2 on: 2020-11-04, 07:54:56 AM »
I mixed flint/flour when I started some of my landraces. They separate fairly easily after mixing. Though it seems easier to select for a pure flint than for a pure flour.

Genetically, it seems to me like the flint/flour trait is sorta codominant, and it is occurring in triploid tissue which muddles selection. Also, I think that there may be other genes involved, which modify things like where the soft starch is located.