Germplasm: AKER_12148

AKER_12148

PI 651016

https://doi.org/10.15454/OGRIRJ

This is a population comprised of the following parents: FC709-2 (PI 599668), C931 (PI 636340), FC902 (PI 590655) C78 (PI 593671), FC607 (PI 590837), MonoHy T6, MonoHy A4, MonoHy A7, C918 (PI 578079) and SR 87 (PI 607899). The crossing scheme was (FC709-2/C931) X {(FC902/C78) X [(FC607/ MonoHy T6+ MonoHy A4+ MonoHy A7+SR87) X C918]}. Components of (FC709-2/C931) were selected for resistance to Rhizoctonia solani and curly top. These selected populations were bulked with the rest and selected for rhizomania resistance, cercospora leaf spot resistance and yield.

FC221 sugarbeet germplasm is multigerm (M) in a fertile cytoplasm, segregating for genetic-male-sterility (a1a1), self-compatibility (Sf) and hypocotyl color (R). It has good resistance to root-rotting strains (AG-2-2) of Rhizoctonia solani K hn and is segregating for the Rz1 gene, which confers resistance to some strains of Beet necrotic yellow vein virus (BNYVV), the causal agent of rhizomania. This germplasms has moderate resistance to Aphanomyces cochlioides Drechsl., which causes aphanomyces root rot (aphanomyces black root). FCC221 shows moderate resistance to Beet curly top virus (BCTV), but does not show resistance to the sugarbeet root aphid (Pemphigus sp.). It has moderate susceptibility to cercospora leaf spot, caused by Cercospora beticola Sacc. This germplasm has good field performance for sugar yield. It is a population from which to select disease-resistant, multigerm pollinator parents.

United States of America