Edward C. Brummer

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Restriction fragment length polymorphism mapping data from nine populations (Glycine max x G. soja and G. max x G. max) of the Glycine subgenus soja genome led to the identification of many duplicated segments of the genome. Linkage groups contained up to 33 markers that were duplicated on other linkage groups. The size of homoeologous regions ranged from(More)
We have developed a restriction fragment length polymorphism (RFLP) linkage map in diploid alfalfa (Medicago sativa L.) to be used as a tool in alfalfa improvement programs. An F2 mapping population of 86 individuals was produced from a cross between a plant of the W2xiso population (M. sativa ssp. sativa) and a plant from USDA PI440501 (M. sativa ssp.(More)
The combination of homologous, homoeologous and paralogous classes of sequence variation presents major challenges for SNP discovery in outbreeding allopolyploid species. Previous in vitro gene-associated SNP discovery studies in the allotetraploid forage legume white clover (Trifolium repens L.) were vulnerable to such effects, leading to prohibitive(More)
Segregation distortion (SD) is often observed in plant populations; its presence can affect mapping and breeding applications. To investigate the prevalence of SD in diploid alfalfa (Medicago sativa L.), we developed two unrelated segregating F1 populations and one F2 population. We genotyped all populations with SSR markers and assessed SD at each locus in(More)
A genetic linkage map is a valuable tool for quantitative trait locus mapping, map-based gene cloning, comparative mapping, and whole-genome assembly. Alfalfa, one of the most important forage crops in the world, is autotetraploid, allogamous, and highly heterozygous, characteristics that have impeded the construction of a high-density linkage map using(More)
Biomass yield heterosis has been shown to exist between Medicago sativasubsp. sativa and Medica gosativa subsp. falcata. The objective of this study was to gain a better understanding of what morphological and genetic factors were most highly correlated with total biomass yield heterosis. We calculated genetic distances among nine sativa and five falcate(More)
Switchgrass (Panicum virgatum), a central and Eastern USA native, is highly valued as a component in tallgrass prairie and savanna restoration and conservation projects and a potential bioenergy feedstock. The purpose of this study was to identify regional diversity, gene pools, and centers-of-diversity of switchgrass to gain an understanding of its(More)
Alfalfa (Medicago sativa L.) is a major forage crop throughout the world. Although alfalfa has many desirable traits, continued breeding is required to incorporate pest resistances and other traits. We conducted this study to determine the amount of restriction fragment length polymorphism (RFLP) variability present within and between diploid and tetraploid(More)
Department of Plant Sciences, Section of Crop and Ecosystem Sciences, University of California, Davis, California 95616–8780 (P.G.); National Center for Genome Resources, Santa Fe, New Mexico 87505 (W.D.B.); Raymond F. Baker Center for Plant Breeding (E.C.B.), and United States Department of Agriculture Agricultural Research Service, Department of Agronomy(More)
D espite doubling of yields of major grain crops since the 1950s, more than one in seven people suffer from malnutrition ( 1). Global population is growing; demand for food, especially meat, is increasing; much land most suitable for annual crops is already in use; and production of nonfood goods (e.g., biofuels) increasingly competes with food production(More)