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Post by flowerbug on Aug 19, 2020 22:41:10 GMT -5
the problem i normally have here is not late blight, but some other foliage disease that doesn't quite kill the plants, but they do get spotted leaves and lose a lot of their foliage. i think it is early blight.
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Post by doffer on Aug 30, 2020 7:18:17 GMT -5
I started off with defiant, because I could get it locally. It has one pH2 and one pH3. If you grow it at least 10 meters from other tomatoes, it will self with no hand pollinations required. Save those seeds, best if they are pooled seeds from several plants. Plant what you need and wait for a bad blight year. The ones that blight and die have just removed themselves from the breeding population. In my area, both pH2 and pH3 are needed, and in a bad blight year, you can tell the ones with 2 copies of each. At this point, save seed from the homozygotes separately and plant one or two in the middle of a group of tomatoes you enjoy the flavour of. Let the bees mix them up and start the process again to concentrate the resistances. Defiant is useful because it's detirminant, a bush type, and I like some of the climbing ones, the indetirminants. The crosses are closer to climbing in phenotype. it's easy to pick them out by the time the fruits form. If you can bring in seeds from outside the EU, Iron lady has two copies of both pH2 and pH3. Otherwise, use what you have and it only takes a couple extra years. Google blight resistance in tomatoes, and see what you get. Here's a link I found, and there are lots more eorganic.org/node/10822Jocelyn I like this a lot. Defiant is a F1 bush (Determinate) tomato. Because it’s a F1 the seeds u take (F2) will be very variable. What kind of tomatoes (taste, size, color, shape, ripening time, etc) did u get from those F2 plants? Determinate is recessive to Indeterminate so I expect all F2 plants are Determinate (bush) tomatoes. How many F.. generations did u take from the Defiant tomatoes? |
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Post by doffer on Aug 30, 2020 7:18:53 GMT -5
Ps jocelyn I also like the Indeterminate (stam) tomatoes. When u plant the F.. Defiant near you’re better tasting tomatoes. Did u get Indeterminate tomato plants when the bees pollinated the flowers? I ask this because I think it’s very difficult to let cross pollinate bees between different tomato varieties. This is because the own pollen in the flower is near the pistil. |
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Post by jocelyn on Aug 31, 2020 14:27:33 GMT -5
Yes, I get some indeterminate ones from the crosses. That's why I use the defiant, because it's a bush type and any crosses will be tall if I use, say Cherokee Purple, as the other parent. If you nip the sepals off with your fingernail the night before, just nip them off straight across, then you can pluck a petal or two to get at the anther cone and just pull it off. Hold the stem though, so you don't pull the FLOWER off.
As to the tomatoes, some bigger, some smaller, some early-ish, some average ripening time, all are red, most are tangy, some quite so, some are sweet and flavourless, but not many. They tend to small salad sized, a bit bigger than cherry tomatoes, unless you had grown them crossed. Shape is a slightly flat globe, usually.
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Post by doffer on Sept 1, 2020 15:48:01 GMT -5
How many generations (F..) are u taking seeds from you’re best Defiant tomatoes? And u u see he tomatoes get more uniform?
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Post by jocelyn on Sept 2, 2020 15:21:18 GMT -5
I don't know how many generations, I've lost track. Yes, more uniform, untill I cross in something else, grin.
I rather like variations, as long as they are blight resistant. I can always self a plant or two to set traits if I want.
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Post by DarJones on Sept 4, 2020 12:30:14 GMT -5
PH2 and PH3 protect against most but not all races of late blight. You can still get disease if one of the really infectious races hits your plants. WV63 has PH2 homozygous. I don't know of a stable OP tomato that has PH3, but you can get it from Amelia, Iron lady, or any of several others mentioned in this thread. Even if you get good late blight tolerance, you will still have to deal with Early Blight, Septoria, and Grey Mold. Tropic has Grey Mold tolerance. Septoria tolerance is in Iron Lady but in my experience is weak. I have a selection out of TGRC's LA0417 that has very good septoria tolerance. It is a large cherry size fruit. Early Blight is difficult. I only know of one resistance gene and it is very weak. Randy Gardner bred it into his Mountain series tomatoes.
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Post by doffer on Sept 5, 2020 5:41:15 GMT -5
Different sources tell the taste of Iron lady is not good. But there is a new Hybrid F1 with homozygous ph2 and ph3:
Galahad (F1) is a bushtype (determinant) beef tomato. Size of the tomatoes is about 220-375gram.
Do u have experience with Galahad F1?
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Post by jocelyn on Sept 5, 2020 14:51:04 GMT -5
DarJones might, but I don't. Where you live might dictate what resistances you need. I haven't had early blight here.
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Post by doffer on Sept 5, 2020 16:01:03 GMT -5
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Post by doffer on Sept 14, 2020 16:20:51 GMT -5
What about Tom Wagner, does he have homozygous tomatoes for ph2 combined with ph3 and maybe ph1 ?
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Post by jocelyn on Sept 15, 2020 10:52:00 GMT -5
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