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Post by mayz on Jul 5, 2012 9:21:45 GMT -5
Belgium is just beyond the northern limit for the cultivation of Vitis vinifera. So traditional cv doesn't ripe under my climate. But in Germany there's active breeding research concerning the earliness and the resistance of the species of the genus Vitis. Several new interspecific hybrids have arisen from these breeding efforts such as Regent (red), Phoenix, Johanniter, Sirius, Bianca, Solaris,...
These hybrids have nearly 90% of the vinifera genetic background resulting in good winemaking abilities (aroma, level of sugar)
Is there similar breeding research in US? What are the results?
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Post by mayz on Jun 6, 2012 8:59:48 GMT -5
The green corns are already two times bigger...the sun is good when you have chlorophylle in your leaves.
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Post by mayz on Jun 6, 2012 5:27:30 GMT -5
Just to signal the observation of an albino seedling in my sowing of Double Red sweet corn. Ephemeral beauty... Attachments:
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Post by mayz on May 31, 2012 10:05:02 GMT -5
If my memory is good Triplesweet is sususeseShsh so field-type kernels can rise from cross pollination with supersweet corn (SuSuSeSeshsh).
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Post by mayz on May 30, 2012 6:37:10 GMT -5
I'm just curious as to whether anyone has any favorite seeded table grapes. If so, please let us know what they are. I have two Muscat Bleu. This grape is not highly sweet but it's really flavorfull and early. Muscat Bleu is an interspecific hybrid developped in Switzerland and resistant to mildew so I can grow it without pesticide. A photo of a part of the vineyard (mainly for winemaking) Attachments:
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Post by mayz on May 30, 2012 5:58:24 GMT -5
How deeply are you planting? MB 2 cm deep (2/3 inch) because my highly fertile soil is also heavy so I never sow deep Here I think the main problems are Rain: after sowing, 13 rainy days with 62 liters/square meter. In these conditions (rain and tempetarure) the supersweet kernels rot easily and sprout slowly Pest: underground worms are very fond of the supersweet seeds Thursday 24 I have sown 150 Double Red sweetcorn. The temperatures were more hot (min 15-18°C max25°C-30°C) during 5 days. On Tuesday 29 95% of the seeds have already sprouted. Of course double red isn't a supersweet corn so a better germination rate is normal. A pic of the patch of young mirais Attachments:
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Post by mayz on May 30, 2012 5:17:05 GMT -5
The only way to avoid problem with supersweet corn (shsh) is to grow another sweetcorn containing the recessive homozygous mutation sh2 like augmented shrunken (multisweet, gourmet sweet) or mirai. In these hybrids, pollination by sh corn will give supersweet kernels (sh) and selfing will give expected phenotypic kernels.
All others sweetcorns pollinated by sh pollen will produce field type kernels in mixture with sweet kernels (from selfing)
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Post by mayz on May 25, 2012 10:44:27 GMT -5
Surgevil, a french cv from Vilmorin
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Post by mayz on May 25, 2012 8:49:46 GMT -5
After the seeds, a pic of a seedling Attachments:
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Post by mayz on May 25, 2012 6:55:23 GMT -5
I have sown outside 400 seeds of Mirai F2 (collected last year) in the end of april. After one month, I have a soil emergence rate of 60%. Mean of temperatures during the month: min 8°C average 12,5°C max 17°C. Last year my sowing of F2 suse has given ... 10% of soil emergence. That's the first time that I sow extrasweet corn outside Is it a high rate of soil emergence for an extrasweet corn? Attachments:
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Post by mayz on May 25, 2012 6:08:42 GMT -5
my peas are going to blossom in few days for the first sowing (end of March). My peas are a cultivar of wrinkled shelled pea. I save the seeds of my peas since four years. Thanks to it I have noticed a clear improvement in soil emergence for the first sowings. Attachments:
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Post by mayz on May 25, 2012 5:53:42 GMT -5
you can also try mirai sweet corn (homozygote for susesh) to reduce the decrease of the sugar rate by cross pollinations with others types of sweet corn
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Post by mayz on May 24, 2012 10:51:37 GMT -5
Just and thanks for the details DarJones
For those interested in corn reproduction: The structure and reproduction of corn / T. A. Kiesselbach an old book but perfectly illustrated
Dosage effect is well illustrated by y1 (gene coding for phytoene synthase in kernel) but I think that the dosage effect of mutant endosperm genes like su and sh will not be so clear in term of taste.
Dosage effect is well known for se in su background
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Post by mayz on May 24, 2012 4:16:52 GMT -5
The problem is present in both pollinations with major drawback for the smallest patch.
female gametophyte x pollen = endosperm
sususeseShSh (sugary enhanced) x SuSesh (extrasweet) = SususuSeseseShShsh (normal)
SuSuSeSeshsh (extrasweet) x suseSh (sugary enhanced) = SuSusuSeSeseShshsh (normal)
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Post by mayz on May 23, 2012 7:46:06 GMT -5
Five years to have some informations...its a long long time from this reference Tracy, W.F. Sweet corn. In "Specialty Corns", (ed. A.R. Hallauer), CRC Press, Boca Raton, FL, pp. 147-187 (1994). Golden Cross Bantam is the first single cross hybrid of sweet corn released in 1933. It was obtain by crossing two strains extracted from Golden Bantam (P39 (high row strain) and P51 (8 rows strain)). So GCB is su sweet corn like GB...eat them fast
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