|Mcgrath, J Mitchell - Mitch|
Submitted to: Annual Beet Sugar Development Foundation Research Report
Publication Type: Other
Publication Acceptance Date: 4/1/2003
Publication Date: 5/1/2003
Citation: TREBBI, D., MCGRATH, J.M. FIELD EVALUATION OF SUGAR X RED BEET POPULATION SEGREGATING FOR SUCROSE CONTENT AND YIELD. 2002 ANNUAL BEET SUGAR DEVELOPMENT FOUNDATION RESEARCH REPORT. 2003. p. D11.
Technical Abstract: Root sucrose concentration is perhaps the most important heritable agronomic trait for the beet sugar industry. Economic return of the crop is roughly calculated by root yield multiplied by the percentage of sucrose content in the roots. Sucrose content in beets is variable, ranging from less than 8% in red beet to more than 18% in sugar beet. A segregating population was created from a cross between sugar beet and red beet. Carbohydrate analyses were performed via HPLC on each greenhouse-grown F2 plant and parent and confirmed in the field on a subset of F3 plants derived from 54 F2 individuals. Genetic analysis of this F2 population was performed with Amplified Fragment Length Polymorphism genetic markers and a genetic linkage map was constructed. Quantitative Trait Loci analyses for sucrose content was performed integrating data from the F2 sucrose content analyses and the genetic map. Results suggested that the number of genes controlling fresh weight sucrose content and root yield is not large, and that the fresh weight sucrose content but not dry weight sucrose content is heritable.