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Research Project: Innovative Strategies and Methods for Improving the Management, Availability, and Utility of Plant Genetic Resource Collections

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Title: FC242 (PI 687276), a sugar beet population with enhanced disease resistance derived from a crop wild relative, WB242

item PANELLA, LEE - Colorado State University
item Fenwick, Ann
item STEVANATO, PIERGIORGIO - Universita Di Padova
item Pakish, Linda
item West, Mark
item Nielson, Amy
item Richardson, Kelley
item Richards, Christopher
item Lewellen, Robert

Submitted to: Journal of Sugar Beet Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/2/2019
Publication Date: N/A
Citation: N/A

Interpretive Summary: The work describes the development of an important germplasm release with sugar beet cyst-nematode resistance for the sugar beet breeding community. The germplasm release is derived from hybridization with a single wild relative accession collected on the Atlantic coast of France and shown to have sugar beet cyst-nematode resistance. The study makes use of a single nucleotide polymorphic marker associated with the resistance gene which increased the efficiency of tracking populations with increased resistance before evaluating them in a multi site field trial.

Technical Abstract: Pests and diseases cause a major reduction in sugar beet yield, both before harvest and in the pile post-harvest waiting for processing. Seventeen F3 families from a mapping cross, homozygous for markers linked to the Rz1 gene (conferring resistance to Beet necrotic yellow vein virus) and the HsBvm-1 gene (conferring resistance to Heterodera schachtii), have been increased and released as a F5 population. This population also has the potential to contain the Pm gene for resistance to powdery mildew. Nine F3 families were chosen at random and greenhouse testing was completed to verify the usefulness of the HsBvm-1 gene marker in a pre-breeding program. Eight of the 9 families performed as predicted by the marker. One family chosen as segregating for the marker showed the phenotype of a susceptible population. Further experiments showed a distorted segregation ratio in this F3 family. The HsBvm-1 gene marker is useful in a pre-breeding program and allows an increased efficiency in selecting a population of enhanced frequency of the HsBvm-1 gene before the line is taken for field testing.