Naslov
Varied response of Beta vulgaris L. Plant Introductions to Cercospora beticola in different environments

Autori
Panella, Lee ; Liović, Ivica ; Ruppel, Earl G. ; Kristek, Andrija

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings (Agricultural) from the 30th Biennial Meeting of the American Society of Sugar Beet Technologists / - Orlando (FL), 1999, 301-306

Skup
30th Biennial Meeting of the American Society of Sugar Beet Technologists

Mjesto i datum
Orlando (FL), Sjedinjene Američke Države, 10.02.1999. - 13.02.1999

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Beta collection; Plant Introduction accessions; Cercospora beticola

Sažetak
Thirty-five Plant Introductions (PIs) from the USDA-ARS National Plant Germplasm System Beta collection were screened for resistance to Cercospora beticola Sacc. at three locations: 1) an artifically produced epiphytotic in Windsor, CO. ; 2) an artifically produced epiphytotic in Osijek, Croatia ; and 3) naturally occurring epiphytotic in Osijek, Croatia. These accessions included sugar beet, leaf beet, garden beet, fodder beet accessions (Beta vulgaris subspecies vulgaris), as well as wild sea beet accessions (Beta vulgaris subspecies maritima). Randomized complete-block designs, with two replications were used to evaluate germplasm. Internal controls included a highly susceptible synthetic check and a resistant hybrid check, (FC504 x FC502/2) x SP6322-0. The artificially inoculated nurseries were inoculated twice. The PIs were visually evaluated on a scale from 0 (no disease) to 10 (plant dead). In Colorado, the leaf spot epidemic progressed rather slowly at first, but rapidly became quite severe by late August to early September. The growing season in Croatia is about one month ahead of Colorado, therefore the trials in Croatia were evaluated earlier. The inoculated nursery in Croatia also had severe disease symptoms. Because some of the annual B.v. subsp. maritima accessions flowered very early in Croatia, they could not be evaluated, and there are complete data (all three locations) available on only 19 of the accessions. An analysis of variance (PROC ANOVA - SAS) on the disease indices (visual evaluation scores) determined that there were significant differences among entries (P=0.05) on all three dates at all three locations. An LSD was generated for mean separations. Although the variation was higher in Osijek, susceptible and resistant controls performed similarly. Some entries, however, which showed resistance in Croatia, were moderately to highly susceptible in Colorado.

Izvorni jezik
Engleski

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