Germplasm: AKER_12212

AKER_12212

PI 668027

https://doi.org/10.15454/KW87GR

F1029 was selected for high amino-nitrogen concentration from F1 01 0, PI 535818. Selection was based upon the amino-nitrogen concentration of roots relative to other roots within a grid. Moderate~size roots typical of the parental population were chosen for individual amino-nitrogen measurements. Sampled roots remained viable and were used as mother roots to produce seed for each of four mass selection cycles. Selected plants were allowed to interpollinate, seed was harvested in bulk.

Roots of F1 029 have white flesh and typical sugarbeet shape with little or no branching. F1029 hypocotyls are predominantly red with a few green. Four cycles of almost exclusive selection for high amino-nitrogen concentration resulted in a 50% increase in amino-nitrogen concentration, compared to F1 01 O. Roots of F1 029 had lower concentrations of sodium and potassium, and a higher sucrose loss to molasses than a line selected from the same population (F1010) for low amino-nitrogen concentration, F1 028. Selecting for high amino-nitrogen concentration had no detectable effect on sucrose concentration. An increase in the loss to molasses of F1029, compared to F1 01 0 was significant. The root yield of F1 029 was 6 Mg ha-1 lower than F1 01 0 and 9 Mg ha"1 lower than the root yield of F1 028. Selecting for high amino-nitrogen had no effect on severity of Cercospora leaf spot (caused by Cercospora beticola) or RhizQctonia root and crown rot (caused by Rhizoctonia solani) F1 01 0 and F1029 are susceptible to both diseases.

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