Germplasm: AKER_12166

AKER_12166

PI 658062

https://doi.org/10.15454/VH3OTE

(FC709-2 (PI 599668) X FC907) F3 selected for resistance to Rhizoctonia solani and selected F3 families screened for resistance to Cercospora beticola (Cb) with resistant 25% recombined to form 2001009. [20001009 X C931 (PI 636340)] F3 = 20031022. 20031022 selected for resistance to Cb, rhizomania, and for size, shape, and percent sucrose and bulked = 05-FC1022.

FC1022 sugarbeet germplasm is multigerm sugar in a fertile cytoplasm, segregating for self-sterility, multigerm, and hypocotyl color. It carries the Rz1 gene, which confers resistance to some strains of Beet necrotic yellow vein virus (BNYVV), the causal agent of rhizomania. It showed a moderate tolerance to Beet curly top virus. FC1022 has moderate susceptibility to cercospora leaf spot, caused by Cercospora beticola Sacc., to Aphanomyces cochlioides Drechsl., which causes aphanomyces root rot (aphanomyces black root) and to root-rotting strains (AG-2-2) of Rhizoctonia solani K hn. When tested at Salinas, CA, under rhizomania conditions, FC1022 had a good percent sucrose. It is a population from which to select disease-resistant, multigerm pollinator parents, and, because of a large percent monogerm (45%) seedballs and O-type parentage, it should be possible to selected monogerm, O-type female maintainer lines.

United States of America