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Evidence for Simple Genetic Control of Sugar Type in Carrot (Daucus carota L.)1
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Abstract
Reducing sugar (glucose and fructose) and sucrose are the major free sugars (total sugars) in the carrot root. Striking genetic variation exists for the reducing sugar/total sugar ratio (percentage of reducing sugar). Inbred carrot lines with high and low percentages of reducing sugar were used as parents in establishing various F
1
, F
2
, F
3
and backcross populations to study the inheritance of root sugars. It was determined that a single major gene regulates the reducing sugar to sucrose balance in carrot roots with dominance for high percentage of reducing sugar. We propose that this gene be designated
Reducing sugar
, symbolized
Rs
. This relationship is of interest since sugars in the carrot root are a major storage carbohydrate and a primary component of carrot flavor.
American Society for Horticultural Science
Title: Evidence for Simple Genetic Control of Sugar Type in Carrot (Daucus carota L.)1
Description:
Abstract
Reducing sugar (glucose and fructose) and sucrose are the major free sugars (total sugars) in the carrot root.
Striking genetic variation exists for the reducing sugar/total sugar ratio (percentage of reducing sugar).
Inbred carrot lines with high and low percentages of reducing sugar were used as parents in establishing various F
1
, F
2
, F
3
and backcross populations to study the inheritance of root sugars.
It was determined that a single major gene regulates the reducing sugar to sucrose balance in carrot roots with dominance for high percentage of reducing sugar.
We propose that this gene be designated
Reducing sugar
, symbolized
Rs
.
This relationship is of interest since sugars in the carrot root are a major storage carbohydrate and a primary component of carrot flavor.
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