Matthew Palmer and Dr. Lee F. Braithwaite, Zoology Throughout the phylum Mollusca, gills are used to accomplish a variety of tasks and are thus highly specialized organs. The chitons, class Polyplacophora, are a primitive group of molluscs whose gills have the unique condition of being aligned on either side of the foot in series of […]
Examination of Atriplex along Interstate I-80
Rick Jellen and Dr. Richard W. Lucas, Agronomy and Horticulture Most living organisms have two sets of chromosomes, one set from each parent. Some vascular plants, however, have been shown to possess more than just two sets of chromosomes. Such plants are referred to as being polyploid. The number of sets of chromosomes an organism […]
Systematics of the Crayfish Group Cambarus Jugicambarus
Don Wyatt and Dr. Keith A Crandall, Zoology The ecology, morphology, behavior, and geographical distribution of freshwater crayfish are extremely diverse. The genus Cambarus is the second largest in species richness, containing over 25% of the crayfish diversity in North America. The subgenus jugicambarus contains 21 species. Relationships among the taxa within this group are […]
Species Boundaries in the Gymnodactylus darwinii complex (Reptilia, Squamata)
Aaron N. Waite and Dr. Jack W. Sites Jr., Zoology Introduction The genus Gymnodactylus is a group of small lizards belonging to the family Gekkonidae, which occur in the east and central areas of Brazil. The species G. darwinii is restricted to the Atlantic Forest and ranges from the northeastern state of Bahia south 1500 […]
Metabolic Response to Temperature for Six Populations of Winterfat (Eurotia lanata)
Tonya Thygerson and Dr. Bruce N. Smith, Botany and Range Science Populations within a species (accessions) are adapted to the particular microclimate of their origin and may, or may not, grow as well when moved to different location. The purpose of this work is to examine how plants adapt their respiratory metabolism to match the […]
Evaluation of Multiple Genotypes of Soybean for Iron-Deficiency Chlorosis Resistance
Jacob Thompson and Dr. Von D. Jolley, Agronomy and Horticulture The objective of this research was to determine if iron-efficiency controlled by one gene is a more predictably inherited trait than when iron-efficiency is controlled by multiple genes. In the calcareous soils of the upper Midwest soybean becomes deficient in iron. This deficiency causes a […]
Predicting Seedling Emergence Using a Hydrothermal Time Model
Jeffrey R. Taylor and Dr. Bruce A. Roundy, Botany and Range Science A hydrothermal time model can be a useful tool to predict when seeds will germinate. These models use soil moisture and temperature data to predict when a seed will germinate and can be applied to a variety of species and under the dynamic […]
Preliminary Phylogeneic Analyses of the Erotylidae (Coleoptera: Cucujoidea: Erotylidae) based on Molecular Data
James A. Robertson and Dr. Michael F. Whiting, Zoology The Cucujoidea, a very diverse beetle superfamily, includes mycophagous and wood consuming beetles. Within the Cucujoidea is the family Erotylidae (pleasing fungus beetles). The Erotylidae includes 125 genera and approximately 2,500 species, and has a worldwide distribution. Erotylids are known for their striking coloration, including black […]
Microsatellite Development in the Threatened Kachina Daisy, Erigeron kachinensis (Asteraceae)
Jesse Migliori and Dr. Loreen Woolstenhulme, Botany and Range Science Introduction Microsatellites, or simple sequence repeats (SSRs) are genetic markers found throughout the genome. Usually consisting of short tandem repeats of 2-6 bases, SSRs offer molecular data from distinguishable loci. Because of their high mutation rates and high allelic diversity, microsatellites are ideal for genetic […]
Expressed Sequence Tags for Chenopodium Quinoa Seed
Shanna Mason and Lucy Stewart with Dr. Craig E. Coleman, Botany and Range Science Quinoa (Chenopoduim quinoa) is a pseudograin cultivated in the Altiplano region of Bolivia and other areas of South America, where it is well adapted to harsh local conditions including high elevation, drought, frost, and saline soils. In addition to its environmental […]
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