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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
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| 0 | PI 655951 | SR98 | Beta vulgaris L. subsp. vulgaris | Michigan, United States | W6 | | | 2009 | DEVELOPED | PRE 02/19/2009 | | | | | Breeding material | SR98 is being released as a germplasm source for breeders to use in developing parental lines with resistance to Rhizoctonia damping-off, as well as combining smooth-rootedness with higher levels of Rhizoctonia crown and root rot resistance than is currently available in smooth-root material. SR98 appears to be useful as an additional source of Fusarium resistance. SR98 is an intermediate stage of development and is expected to segregate for these and other traits, however a majority of individuals are expected to be resistant to seedling or crown and root rot diseases, or both. SR98 is diploid, self-sterile, multigerm, and biennial. In the 2008 seedling Rhizoctonia nursery in East Lansing, SR98 had a mean stand count in July of 25.7 plants (std. dev = 3.5, n= 7 plots), relative to the resistant EL51 (mean = 21.0, std. dev. = 5.2, n = 4) and the susceptible SP7322 (mean = 2.5, std. dev. = 0.6, n = 4). Pre-inoculation stand counts taken June 29, 2008 for these three germplasms was 36.6 plants per plot (std. dev. = 7.4) with no significant difference between germplasms at this stage. In the 2007 Ft. Collins, CO Rhizoctonia crown and root rot nursery, SR98 had a Disease Index (DI; 0 = no disease, 7 = dead) of 1.7, relative to the highly resistant, resistant, and susceptible checks of 1.5, 2.8, and 3.5, respectively. Agronomic performance of SR98 has been reasonable in trials at the Saginaw Valley Bean and Beet Farm in Saginaw, MI. In 2008, 30-day emergence was 130.8% of eight commercial checks, yield was 85.3% of the same checks (19.6 T/A vs. 23.0 T/A), percent sucrose fresh weight was 90.7% of checks (16.8 vs. 18.6%), and percent dry matter was 88.8% of checks (21.2% vs. 23.9%). Sucrose percent expressed as a fraction of dry matter was 101.9% of checks (79.4% vs. 77.9%; range of commercial values = 75.0 to 80.3). | 1795198 | PI 655951 |