Forum area for discussing hybridizing tomatoes in technical terms and information pertinent to trait/variety specific long-term (1+ years) growout projects.
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April 22, 2015 | #1 |
Tomatovillian™
Join Date: Feb 2012
Location: Newfoundland, Canada
Posts: 6,793
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GOBLET gene and dwarf (or microdwarf) tomatoes
I have a couple of runts from two different batches of F2 seedlings (both Kimberley crosses), and both of them have strange cotyledons - smaller than normal and also lobed. I was curious about that feature so did a bit of a search, and turned up this paper about the GOBLET (GOB) gene in tomato which produces lobed cotyledons, dwarf plants and some other effects.
http://jxb.oxfordjournals.org/conten...xb.ert324.full I wondered if this is a gene involved in some lines of microdwarf, which aren't rugose. Also wondering whether these plants will be dwarfs (rather than runts) and whether they'll produce fruit. I think I'm curious enough to keep them until I see what the flowers look like. I have a couple of normal dwarfs from a different F2 cross, and these plants are about the same size. Below are some pictures of my plants' lobed cotyledons - not exactly like the ones shown in the figure, http://jxb.oxfordjournals.org/conten...4/F4.large.jpg but it could be a variant effect of the same mutation, perhaps? Has anyone else seen oddly shaped cotyledons in runt plants, or in some lines of microdwarf? |
April 22, 2015 | #2 |
Tomatovillian™
Join Date: Feb 2014
Location: France
Posts: 688
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I had a lobed /split cotyledon in a blue silvery fir tree seedling
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April 22, 2015 | #3 |
Tomatovillian™
Join Date: Jun 2012
Location: Minnesota
Posts: 586
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The micro plants I've been working with seem to have the "dwarf" and "sun-dwarf" traits. In these plants, the cotyledens look entirely typical.
I'd say to go ahead and see how the plants do.
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May 29, 2015 | #4 |
Tomatovillian™
Join Date: May 2013
Location: Honey Brook, PA Zone 6b
Posts: 399
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Any new developments with the odd cotleydons?
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May 29, 2015 | #5 |
Tomatovillian™
Join Date: Feb 2012
Location: Newfoundland, Canada
Posts: 6,793
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Yes... I set aside the three plants that had the strange cotyledons to see what came. One of them developed into a normal sized seedling - it was just a bit slower than the pack. A second one became tall but sparsely foliated and no signs of being fruitful. The third seedling appears to be a genuine dwarf. When it set first cluster of buds I potted it up, and now it is flowering.
I have two rugose dwarf selections from one of my F2's, both of which are huge by comparison to this little plant. It''s pretty cute. About a foot tall. |
May 29, 2015 | #6 |
Tomatovillian™
Join Date: Jul 2013
Location: Ontario
Posts: 3,886
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I had a lobed cotleydon on a Ditmarsher seedling.
Linda |
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