897tgigvib
Garden Master
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I really wonder what would happen if Safeway Cluster F4 was crossed with Early Girl F1, and in the same garden during the same year, Lemon Boy F1 (or its stabilized version) was crossed with Stupice. And then, the following year, each of those F1's were crossed and grown to seed. The year after that grown out and backcrossed to Early Girl F1. From there the following years, there would be a good selection of plants to choose and select for traits. After getting 4 different lines going, each with a desired set of traits, sibling cross them together and begin selecting.
Remember, most disease resistance genes are DOMINANT, which means disease resistance is MORE DIFFICULT to stabilize. That counterintuitive thing, that dominant genes are more difficult to stabilize is very true. D/r will express as D but when crossed with another D/r, as in self pollinated or with another variety or selection having the same D/r does the 7th grade math thing, (D x r) x (D x r) = D/D, D/r, D/r, and r/r so selecting for that D which 3 of 4 show, 2 thirds of those which express the D carry the r. Sorry about the math. What it means is that dominant traits such as disease resistance are more difficult to stabilize.
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BUT NOT IMPOSSIBLE!
Some breeders call a selection for D/D, (for a dominant trait to be fixed and set), they call that kind of selection "Power Selection".
A batch of F2 seeds are planted. Let's simplify it to 4 seeds that happen to be presorted magically so they are exactly according to the statistically correct numbers. It can happen, but not likely. The following 4 seeds are planted: D/D, D/r, D/r, and r/r. Say ya want them resistant to a common Fusarium your soil is infested with, and those Early Girls grow like, no problem baby! And, your Brandywines plop over dead from it before they are a month old.
Really, what the Early Girl breeders did that was tricky, was give them resistance, but it only took one of Early Girl's parents to be resistant to make early Girl also resistant. Early Girl is D/r. You self an Early Girl and you get those 3 gene types for that resistance, D/D, D/r, D/r, and r/r.
Grow those seedlings in your infested soil and the r/r dies within a month just like your brandywines. But you still have 3 plants. 1 has D/D genes, <<<That's the one you want, except you also still have 2 that are D/r, and those 2 will also start you over again selecting next year at almost the same stage you started this year. Unless you do something different selecting.
You have to save seeds separately from each plant! and then grow them all organized the next year. Any that have and show r/r, even a single one out of 20, all those need to be tossed to the garbage, or given to someone without the fusarium problem.
One of 4 on average will have 20 daughter self pollinated seeds, all of which are D/D... FOR THAT SINGLE TRAIT!
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But Early Girl has D/r for several special traits. Plus, the breeders took care to ensure that she could not easily be stabilized, possible, but difficult. That's why I suggest the preliminary crosses. I find nothing is more resistant and tougher than Lemon Boy. And Lemon Boy is stabilizable too. So is Safeway Cluster. Stupice has that Awesome flavor, and Lemon Boy and Safeway Cluster have good flavors too.
So, selecting several lineages of the crosses, stabilizing their selected Dominant traits, and then Sibling cross them together, that should do it.
=====
I know, someone's gonna say put that in English. What I did was describe it in Neanderthal, as simple as can be. Jared will actually correct me on wordage and usage of the single form D/D instead of "fus1Dx/fus1Djzx, allelic form Chr12s telomeric somotropic...". Lol, the math I kept at Mr. Jones 6th period 7th grade math class, I think distributive property, only slightly modified, simplified. I left out chi square to the 95th percentile, and simply called 20 seeds enough, and for a single trait it should be enough. 12 should be enough for 92 percent accuracy.
Remember, most disease resistance genes are DOMINANT, which means disease resistance is MORE DIFFICULT to stabilize. That counterintuitive thing, that dominant genes are more difficult to stabilize is very true. D/r will express as D but when crossed with another D/r, as in self pollinated or with another variety or selection having the same D/r does the 7th grade math thing, (D x r) x (D x r) = D/D, D/r, D/r, and r/r so selecting for that D which 3 of 4 show, 2 thirds of those which express the D carry the r. Sorry about the math. What it means is that dominant traits such as disease resistance are more difficult to stabilize.
=====
BUT NOT IMPOSSIBLE!
Some breeders call a selection for D/D, (for a dominant trait to be fixed and set), they call that kind of selection "Power Selection".
A batch of F2 seeds are planted. Let's simplify it to 4 seeds that happen to be presorted magically so they are exactly according to the statistically correct numbers. It can happen, but not likely. The following 4 seeds are planted: D/D, D/r, D/r, and r/r. Say ya want them resistant to a common Fusarium your soil is infested with, and those Early Girls grow like, no problem baby! And, your Brandywines plop over dead from it before they are a month old.
Really, what the Early Girl breeders did that was tricky, was give them resistance, but it only took one of Early Girl's parents to be resistant to make early Girl also resistant. Early Girl is D/r. You self an Early Girl and you get those 3 gene types for that resistance, D/D, D/r, D/r, and r/r.
Grow those seedlings in your infested soil and the r/r dies within a month just like your brandywines. But you still have 3 plants. 1 has D/D genes, <<<That's the one you want, except you also still have 2 that are D/r, and those 2 will also start you over again selecting next year at almost the same stage you started this year. Unless you do something different selecting.
You have to save seeds separately from each plant! and then grow them all organized the next year. Any that have and show r/r, even a single one out of 20, all those need to be tossed to the garbage, or given to someone without the fusarium problem.
One of 4 on average will have 20 daughter self pollinated seeds, all of which are D/D... FOR THAT SINGLE TRAIT!
=====
But Early Girl has D/r for several special traits. Plus, the breeders took care to ensure that she could not easily be stabilized, possible, but difficult. That's why I suggest the preliminary crosses. I find nothing is more resistant and tougher than Lemon Boy. And Lemon Boy is stabilizable too. So is Safeway Cluster. Stupice has that Awesome flavor, and Lemon Boy and Safeway Cluster have good flavors too.
So, selecting several lineages of the crosses, stabilizing their selected Dominant traits, and then Sibling cross them together, that should do it.
=====
I know, someone's gonna say put that in English. What I did was describe it in Neanderthal, as simple as can be. Jared will actually correct me on wordage and usage of the single form D/D instead of "fus1Dx/fus1Djzx, allelic form Chr12s telomeric somotropic...". Lol, the math I kept at Mr. Jones 6th period 7th grade math class, I think distributive property, only slightly modified, simplified. I left out chi square to the 95th percentile, and simply called 20 seeds enough, and for a single trait it should be enough. 12 should be enough for 92 percent accuracy.
And the Blueberry Blend is just for fun.
.) It is the slicer and is an 80 day tomato. Porter is quicker and the oldest.
) are showing up!
