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Title: Notice of Release of FC1018, FC1019, FC1020 and FC1022 Multigerm Sugarbeet Germplasms with Multiple Disease Resistance

Author
item Panella, Leonard
item Lewellen, Robert
item Webb, Kimberly

Submitted to: Germplasm Release
Publication Type: Germplasm Release
Publication Acceptance Date: 11/8/2009
Publication Date: 12/4/2009
Citation: Panella, L.W., Lewellen, R.T., Webb, K.M. 2009. Notice of Release of FC1018, FC1019, FC1020 and FC1022 Multigerm Sugarbeet Germplasms with Multiple Disease Resistance. Germplasm Release.

Interpretive Summary: FC1018 (PI 658059) has excellent resistance to root-rotting strains (AG-2-2) of Rhizoctonia solani Kühn and carries the Rz1 gene, which confers resistance to some strains of Beet necrotic yellow vein virus (BNYVV), the causal agent of rhizomania. FC1018 has shown a moderate tolerance to cercospora leaf spot (CLS), caused by Cercospora beticola Sacc., to Beet curly top virus (BCTV), and to Aphanomyces cochlioides Drechsl., which causes aphanomyces root rot (aphanomyces black root). FC1018 has shown favorable yield characteristics when evaluated as a line and a pollinator in experimental hybrids in two trials grown under rhizomania conditions at Salinas in 2006. It is a population from which to select disease-resistant, multigerm pollinator parents. FC1019 (PI 658060) carries the Rz1 gene, which confers resistance to some strains of BNYVV and has shown resistance to BCTV. It has shown a moderate tolerance to rhizoctonia root rot, to CLS, and to aphanomyces root rot. FC1019 has shown excellent root yield when evaluated as a line and pollinator in experimental hybrids in two trials grown under rhizomania conditions at Salinas in 2006. It is a population from which to select disease-resistant, multigerm pollinator parents. FC1020 (PI 658061) carries the Rz1 gene, which confers resistance to some strains of BNYVV. It has good resistance to rhizoctonia root rot and moderate resistance to CLS, BCTV, and aphanomyces root rot. FC1020 has good field performance for sucrose yield. It is a population from which to select disease-resistant, multigerm pollinator parents. FC1022 (PI 658062) carries the Rz1 gene, which confers resistance to some strains of BNYVV. It showed a moderate tolerance to BCTV. FC1022 has moderate susceptibility to CLS, aphanomyces root rot, and to rhizoctonia root rot. When tested at Salinas, CA, under rhizomania conditions, FC1022 had good sucrose content. 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, CMS maintainer lines from this germplasm.

Technical Abstract: FC1018 (PI 658059) has excellent resistance to root-rotting strains (AG-2-2) of Rhizoctonia solani Kühn and carries the Rz1 gene, which confers resistance to some strains of Beet necrotic yellow vein virus (BNYVV), the causal agent of rhizomania. FC1018 has shown a moderate tolerance to cercospora leaf spot (CLS), caused by Cercospora beticola Sacc., to Beet curly top virus (BCTV), and to Aphanomyces cochlioides Drechsl., which causes aphanomyces root rot (aphanomyces black root). FC1018 has shown favorable yield characteristics when evaluated as a line and a pollinator in experimental hybrids in two trials grown under rhizomania conditions at Salinas in 2006. It is a population from which to select disease-resistant, multigerm pollinator parents. FC1019 (PI 658060) carries the Rz1 gene, which confers resistance to some strains of BNYVV and has shown resistance to BCTV. It has shown a moderate tolerance to rhizoctonia root rot, to CLS, and to aphanomyces root rot. FC1019 has shown excellent root yield when evaluated as a line and pollinator in experimental hybrids in two trials grown under rhizomania conditions at Salinas in 2006. It is a population from which to select disease-resistant, multigerm pollinator parents. FC1020 (PI 658061) carries the Rz1 gene, which confers resistance to some strains of BNYVV. It has good resistance to rhizoctonia root rot and moderate resistance to CLS, BCTV, and aphanomyces root rot. FC1020 has good field performance for sucrose yield. It is a population from which to select disease-resistant, multigerm pollinator parents. FC1022 (PI 658062) carries the Rz1 gene, which confers resistance to some strains of BNYVV. It showed a moderate tolerance to BCTV. FC1022 has moderate susceptibility to CLS, aphanomyces root rot, and to rhizoctonia root rot. When tested at Salinas, CA, under rhizomania conditions, FC1022 had good sucrose content. 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, CMS maintainer lines from this germplasm.