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Divergent Breeding For Tiller Digestibility Modified Leaf, Sheath, And Stem Composition Of Switchgrass (Panicum Virgatum L.), K. P. Vogel, G. Sarath, R. Mitchell
Divergent Breeding For Tiller Digestibility Modified Leaf, Sheath, And Stem Composition Of Switchgrass (Panicum Virgatum L.), K. P. Vogel, G. Sarath, R. Mitchell
IGC Proceedings (1997-2023)
Switchgrass (Panicum virgatum. L.) is a cross-pollinated, C4 species that is native to the prairies of temperate North America. Breeding to improve its forage quality has been conducted using post-heading, whole-tiller in vitro dry matter digestibility (IVDMD) as the selection criterion. One breeding cycle (C-1) for low IVDMD and three cycles for high IVDMD (C1, C2, C3) were completed in a switchgrass population adapted to the USA mid-latitudes. Sward trials demonstrated that whole plant IVDMD had been improved (Hopkins et al., 1993). The objective of this study was to determine the effect of breeding for tiller …
The Correlation Between Plant Morphology And Dry Yield Of Elephantgrass, Xia Zhang, Hongru Gu, Chenglong Ding
The Correlation Between Plant Morphology And Dry Yield Of Elephantgrass, Xia Zhang, Hongru Gu, Chenglong Ding
IGC Proceedings (1997-2023)
No abstract provided.
Genetic Diversity Correlates With Morphological Diversity Among Populations Of Achyrachaena Mollis, Rachel S. Bice
Genetic Diversity Correlates With Morphological Diversity Among Populations Of Achyrachaena Mollis, Rachel S. Bice
University Honors Theses
Biodiversity is important for ecosystem health and sustainability, especially in the current, rapidly changing climate. Understanding the underlying causes behind morphological variation will allow for more accurate predictions about how a population will respond to climate change, and potentially yield better natural resource management strategies. Achyrachaena mollis is an annual, self-fertilizing, range-limited, endemic species found in Northern California and Southern Oregon. This species depends primarily on wind seed dispersal for gene flow, making it a good study species in seed dispersal experiments. Additionally, A. mollis is more readily influenced by changes in its environment than a perennial due to its …
One Lump Or Two: How Many Wild Gingers Inhabit North America?, W. John Hayden
One Lump Or Two: How Many Wild Gingers Inhabit North America?, W. John Hayden
Biology Faculty Publications
Depending on which source one consults, the answer is either one (Asarum), or two (Asarum + Hexastylis). It is a classic lump-or-split situation. To mention just a few sources, Fernald (1950) and Gleason & Cronquist (1991) lump all the wild gingers into a single genus, whereas Radford et al. (1968), the Digital Atlas of the Virginia Flora (Virginia Botanical Associates 2010), and the Flora of North America (Whitmore & Gaddy 1997; Whitmore et al. 1997) split Asarum and Hexastylis apart. Deference to authority is a poor way to assess any scientific question, and for these wild …
Osmophores, Floral Features, And Systematics Of Stanhopea (Orchidaceae), Kenneth J. Curry, Lorraine M. Mcdowell, Walter S. Judd, William Louis Stern
Osmophores, Floral Features, And Systematics Of Stanhopea (Orchidaceae), Kenneth J. Curry, Lorraine M. Mcdowell, Walter S. Judd, William Louis Stern
Faculty Publications
The floral fragrance glands (osmophores) of 18 species of Stanhopea and Sievekingia were examined through a series of developmental studies at light and electron microscope levels including late bud stages through postanthesis. Various characters were identified to be of potential systematic value and were recorded for each species. These characters included: texture of the osmophore surface, number of distinct cell layers comprising the osmophore, nature of lipid inclusions in osmophore cells, and presence or absence of plastoglobuli in osmophore amyloplasts. These characters were combined with traditional features of floral lip morphology for cladistic analysis. Sievekingia was the postulated outgroup. Stanhopea …
Effects Of Nutrients On Productivity And Morphology Of Typha Angustifolia X Latifolia, V. Bonnewell, D. C. Pratt
Effects Of Nutrients On Productivity And Morphology Of Typha Angustifolia X Latifolia, V. Bonnewell, D. C. Pratt
Journal of the Minnesota Academy of Science
The productivity of natural stands of cattails (Typha latifolia) has been correlated with the amounts of nutrients in the soil and water by Boyd and Hess (Ecology, 51: 296, 1970). The direct effects of varying levels of nitrogen (N), phosphorus (P) and potassium (K) on productivity were examined in our study by growing cattails in Hoagland's nutrient solution. Concentrations of ¼, 1/16, and 1/64 the amount of N present in complete Hoagland's solution (0.01Ml resulted in 63 percent, 48 percent and 26 percent of the dry weight of plants grown in complete solution. Rhizomes used to start plants contained considerable …
Scirpus Validus And S. Acutus: A Question Of Distinctness, Marlyn Miller, E. O. Beal
Scirpus Validus And S. Acutus: A Question Of Distinctness, Marlyn Miller, E. O. Beal
Journal of the Minnesota Academy of Science
An analysis of 32 populations of bulrushes in the Scirpus validus-acutus complex growing in Itasca State Park and prairie ponds to the west indicates that most of the populations are referable to neither S. validus nor S. acutus but, rather, are intermediate in morphology. Further, the supposedly characteristic features by which the two nomenclatural species have been identified are erratically correlated.
A Preliminary Report On The Comparative Morphology Of The Shoot Apex Of Isoetes Macrospora Dur. And Some Effects Of Experimentally Applied Indole-3-Acetic Acid And Gibberellic Acid, Daniel R. Zinda
Journal of the Minnesota Academy of Science
Isoetes macrospora Dur. was found growing in 20 inches to 4 ft. of water in several sandy-bottomed lakes in Itasca County, Minnesota. The pH of the lakes was about 6 and the characteristic tree species of the immediate shorelines were: Thuja occidentalis, Pinus resinosa, Abies balsomea, Populus tremuloides, and Betula papyrifera. Experimental and normal plants were grown submerged in 1-liler beakers in the greenhouse for the 2-week experimental period. The normal shoot apex of /. macrospora is described as having three zones. Zone I, the metrameristem, consists of the superficial layer of initials which divide usually by anticlinal divisions and …