Breeding a bi color

Fusion_power · December 18, 2016

Mark, this is a good example of dosing effect. I've grown out some crosses with Cherokee Green and had very similar results. If you grow the resulting seed, they will segregate 1 green when ripe, 3 salmon bicolor, and 12 that can be either red or yellow depending on the other parent. This is caused by the biopath interruption from the green when ripe gene. The full lycopene biopath is present in Cherokee Green but it is stopped prior to production of yellow carotenoids. When Cherokee Green is crossed with a yellow variety, the yellow patches across GWR and CG patches across Yellow. The result is a red fruit but with dosing effects since only one copy of the gene is present to bypass GWR and one copy is present to bypass Yellow.

Now for the interesting tidbit. If you grow out the seed, 1 in 16 will produce the brightest candy apple red tomato you have ever grown.

December 18, 2016	#14
Fusion_power Tomatovillian™ Join Date: Feb 2006 Location: Alabama Posts: 2,250	Mark, this is a good example of dosing effect. I've grown out some crosses with Cherokee Green and had very similar results. If you grow the resulting seed, they will segregate 1 green when ripe, 3 salmon bicolor, and 12 that can be either red or yellow depending on the other parent. This is caused by the biopath interruption from the green when ripe gene. The full lycopene biopath is present in Cherokee Green but it is stopped prior to production of yellow carotenoids. When Cherokee Green is crossed with a yellow variety, the yellow patches across GWR and CG patches across Yellow. The result is a red fruit but with dosing effects since only one copy of the gene is present to bypass GWR and one copy is present to bypass Yellow. Now for the interesting tidbit. If you grow out the seed, 1 in 16 will produce the brightest candy apple red tomato you have ever grown.