jcm05
Administrator
Posts: 1,685
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Post by jcm05 on Nov 12, 2010 7:04:03 GMT -5
Characterization and Inheritance of the Anthocyanin fruit (Aft)... jhered.oxfordjournals.org/content/94/6/449.fullAbstract Tomato (Lycopersicon esculentum) accession LA1996 with the Anthocyanin fruit (Aft) gene has dark green foliage, elevated anthocyanin expression in the hypocotyls of seedlings, and anthocyanin in the skin and outer pericarp tissues of the fruit. Interest in the health benefits and antioxidant capacity of anthocyanins led to this study of the genetic potential for increased levels of this important class of phytonutrients in tomato fruit. In order to conform to tomato gene nomenclature rules, we propose changing the symbol Af for Anthocyanin fruit to Aft. Segregation ratios of anthocyanin expression in F2 and BC1 populations of a cross between the processing tomato UC82B and LA1996 were consistent with a single dominant gene hypothesis. Anthocyanin expression was reduced in backcross populations compared to F2 populations. Anthocyanin concentration, as measured by the pH differential method, of pigment-rich pericarp and skin tissues from LA1996 was estimated to be 20.6 mg/100 g and 66.5 mg/100 g, respectively. Anthocyanidin composition was characterized by high-performance liquid chromatography (HPLC). Fruit of accession LA1996 contained predominantly petunidin, followed by malvidin and delphinidinin. Lycopene, β-carotene, phytoene, and phytofluene levels were similar to those of normal tomatoes and lower than those found in high pigment tomatoes.
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tomato
Tomato Gardener
Posts: 58
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Post by tomato on Nov 13, 2010 10:13:48 GMT -5
That translates to a single dominant gene in a background that does not include the hp gene. Combine Aft with atv (atroviolaceae) and you get an almost black tomato. Add hp and you get redder reds and darker blacks.
Tomato
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Post by GunnarSK on Nov 13, 2010 16:18:44 GMT -5
That translates to a single dominant gene in a background that does not include the hp gene. Combine Aft with atv (atroviolaceae) and you get an almost black tomato. Add hp and you get redder reds and darker blacks. Tomato I guess it's useful to go to Tom Wagner's TaterMaterSeeds board to read more about this, ia. the posts of Darrell Jones: tatermater.proboards.com/index.cgi?board=general&action=display&thread=307&page=2
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Post by frogsleapfarm on Nov 13, 2010 17:25:14 GMT -5
Aft, and possibly atv, is/are light regulated. Cool temps also increase expression of this regulatory gene governing anthocyanin expression in tomato fruit. I find that in segregating F2 populations, progeny containing both Aft and atv/atv differ in their response to light and temp - high light, cool temps more plants with black fruit, mid-summer fruit w/ more canopy, sorts out the men from the boys.
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