Germplasm: AKER_12197

AKER_12197

PI 664918

https://doi.org/10.15454/RUATNH

Breeding/research material

EL63 is a broad genetic base diploid selected for tolerance to sugar beet cyst nematode (SBCN) and shares parentage with EL58 and EL59 with tolerance to SBCN where seed was harvested in bulk from N172, N112, P507-303, CR511-7-302, R136, M1-4 (PI 663871), M1-3, P207/8, Y167, and Y277, kindly donated by Robert Lewellen (USDA-ARS retired), after three large polycrosses in the 2007, 2008, and 2010 greenhouses with smooth-root high sugar East Lansing breeding germplasm.

EL63 derives from seed harvested from 257 mother roots in a 2008 greenhouse polycross block after selection for freedom from disease and root size in the 2007 root evaluation nursery in East Lansing, MI. These were derived from a 2007 greenhouse polycross of SBCN breeding lines related to EL58, and seed from these 257 mother roots was harvested in bulk as EL-A022776. Fifty mother roots from EL-A022776 were selected on the basis of root size and freedom from disease in a mild SBCN selection nursery in Michigan in 2009, and intercrossed with 50 roots of EL-A022801, a sibling breeding line of the lineage leading to SR99, for incorporation of smooth-root and high sugar. EL63 is the seed harvested from EL-A022776, and is designated EL-A027007. EL63 was tested as EL-A027007 in 2011 where it yield 4063.3 lbs recoverable white sugar per acre (RWSA) among entries a 2011 Michigan SBCN trial with moderate nematode pressure (mean = 3,136.1 RWSA, LSD 0.05 = 717.7). EL64 is moderately to Cercospora leaf spot and susceptible to Aphanomyces root rot.

United States of America