Beta maritima (eBook)

Leonard (Lee) W. Panella is a plant breeder, formerly with the USDA-ARS, now as an affiliate faculty of Colorado State University in Fort Collins, CO. Dr. Panella received a B.S. from Michigan State University, an M.S. from Texas A&M, and a Ph.D. from the University of California at Davis. He joined the USDA-ARS as a research geneticist at the Sugar Beet Research Unit in Fort Collins, CO. in 1992, became Research Leader in 2000 and retired in 2017.  He has authored or co-authored over 200 publications. He has participated in crop improvement programs dealing with five different crop species; has characterized genetic diversity in sorghum, cowpea, sugar beet, Fusarium oxysporum fsp. betae, and Rhizoctonia solani Kühn with classical and molecular genetic methods; and has released 45 germplasms in three crop species. Most of these releases have been for sugar beet and he has worked extensively in characterizing and utilizing Beta maritima.  He has actively supported plant exploration missions to fill gaps in the USDA-ARS NPGS Beta collection, collaborated in a collection trip to Greece for Beta nana, and participated in the collection trip for Beta maritima and Beta patellaris in Morocco.

J. Mitchell (Mitch) McGrath is a Research Geneticist with the USDA-ARS with primary responsibility for sugar beet genetics, genomics, and germplasm enhancement, since 1996. He has released several enhanced germplasms targeting traits needed for the rain-fed Eastern US growing region, including reduced soil tare (smooth root) material with increasing levels of disease resistance and improved agronomic performance. In particular, EL54 (PI 654357) was released with Aphanomyces damping-off resistance derived from Beta maritima WB879.  Molecular investigations uncovered novel mechanisms contributing to seedling vigour and methods were developed to allow for selection of improved seedling vigour using aqueous solutions, including germination in saline solutions to improve salt-tolerant germination, resulting in release of EL56 (PI 663211) derived from NPGS Accession 'Ames 3015'. Development of the sugar beet crop is regular and committed post-germination, and a developmental phase change was characterized at ca. five weeks post-emergence in the greenhouse, concomitant with the accumulation of sucrose and biomass as well as the acquisition of adult-type (chronic) root disease resistances. Genetic signatures of selection are currently being uncovered through construction of the EL10 sugar beet genome reference assembly and application of additional cultivar and germplasm short-read sequences. Such genome archaeology is proving illuminating in describing genes that define and sustain the beet sugar industry, as well as the various table, fodder, and leaf crops of Beta vulgaris.