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Plasticity Of Sorghum Biomass And Inflorescence Traits In Response To Nitrogen Application, Kyle M. Linders
Plasticity Of Sorghum Biomass And Inflorescence Traits In Response To Nitrogen Application, Kyle M. Linders
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Nitrogen is an essential nutrient required for growth and development in plants. Insufficient nitrogen availability can reduce vegetative growth and grain yield. However, nitrogen is a costly input for farmers, is energy intensive to manufacture, and runoff of excess nitrogen fertilizer impacts water quality. Compared to its close relative, maize, sorghum has much greater resilience to nitrogen and water deficit, and heat stress, allowing sorghum to be grown with fewer inputs and on marginal land. Variation in total biomass accumulation and grain yield between sorghum accessions, as well as between nitrogen conditions, can be largely explained by differences in vegetative …
Introduction To Sorghum Paper Production, Zachary Christman
Introduction To Sorghum Paper Production, Zachary Christman
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Sorghum is a tall grass used for many commercial products such as fodder and syrup. The 10 to 15 feet stalk of the plant has lower lignin than wood and provides a fiber length of 2.31 mm in the outer covering and 1.38 mm for the leaf. Sorghum fiber makes a high quality, strong paper suitable for printing, packaging and paperboard.
Msh1-Mediated Non-Genetic Phenotypic Variation In Plants: Prospects For Epigenetic Breeding In Sorghum Bicolor, Dikungwa Ketumile
Msh1-Mediated Non-Genetic Phenotypic Variation In Plants: Prospects For Epigenetic Breeding In Sorghum Bicolor, Dikungwa Ketumile
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Sorghum is the fifth most important cereal crop grown in the world, and is the primary staple food for many people in developing countries. Like other major crops, its improvement is constrained by depletion of genetic diversity within breeding germplasm. Investigated in this study is the unique creation of non-genetic phenotypic variation through altering MutS Homolog1 (MSH1), a plant-specific gene, and the potential it presents for sorghum improvement. Suppression of MSH1 results in non-genetic developmental reprogramming. The derived MSH1 memory lines, when used in crossing, result in heritable phenotypic variation that enhances plant vigor and agronomic performance. A …
The Rate Of Shattercane X Sorghum Hybridization In Situ, Jared J. Schmidt
The Rate Of Shattercane X Sorghum Hybridization In Situ, Jared J. Schmidt
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Cultivated sorghum (Sorghum bicolor subsp. bicolor) can interbreed with its close weedy relative shattercane (S. bicolor subsp. drummondii). The introduction of traits from cultivated sorghum into a shattercane population could contribute to the invasiveness of the wild shattercane population. An in situ experiment was conducted across two years to determine the potential for pollen-mediated gene flow from grain sorghum to shattercane. Shattercane with juicy midrib (dd) was planted in a soybean field in concentric arcs at varying distances from a sorghum pollen source with dry midrib (DD). The arcs were placed so …
Evaluation Of Novel Input Output Traits In Sorghum Through Biotechnology, Tejinder K. Mall
Evaluation Of Novel Input Output Traits In Sorghum Through Biotechnology, Tejinder K. Mall
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Sorghum [Sorghum bicolor (L.) Moench] is the fifth most important cereal crop world-wide as well as an important source of feed, fiber and biofuel. It is a C4 plant and is well adapted to environments subject to high temperature and water limitation. Despite these agronomic qualities, it suffers from limitations of sensitivity to low temperature and the grain has drawbacks in relation to functionality and digestibility. The objectives of this study are: 1. To promote seed germination at low temperature and to enhance the seedling cold tolerance. 2. To enhance the grain digestibility and functionality. In an attempt to …
Genetic Mapping Of Quantitative Trait Loci Associated With Bioenergy Traits, And The Assessment Of Genetic Variability In Sweet Sorghum (Sorghum Bicolor (L.). Moench), Aatshwaelwe Lekgari Lekgari
Genetic Mapping Of Quantitative Trait Loci Associated With Bioenergy Traits, And The Assessment Of Genetic Variability In Sweet Sorghum (Sorghum Bicolor (L.). Moench), Aatshwaelwe Lekgari Lekgari
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Sweet sorghum, a botanical variety of sorghum is a potential source of bioenergy because high sugar levels accumulate in its stalks. The objectives of this study were to explore the global diversity of sweet sorghum germplasm, and map the genomic regions that are associated with bioenergy traits. In assessing diversity, 142 sweet sorghum accessions were evaluated with three marker types (SSR, SRAP, and morphological markers) to determine the degree of relatedness among the accessions. The traits measured (anthesis date [AD], plant height [PH], biomass yield [BY], and moisture content [MC]) were all significantly different (P<0.05) among accessions. Morphological marker clustered the accessions into five groups based on PH, MC and AD. The three traits accounted for 92.5% of the variation. There were four and five groups based on SRAP and SSR data respectively classifying accessions mainly on their origin or breeding history. The observed difference between SSR and SRAP based clusters could be attributed to the difference in marker type. SSRs amplify any region of the genome whereas SRAP amplify the open reading frames and promoter regions. Comparing the three marker-type clusters, the markers complimented each other in grouping accessions and would be valuable in assisting breeders to select appropriate lines for crossing. In evaluating QTLs that are associated with bioenergy traits, 165 recombinant inbred lines (RILs) were planted at four environments in Nebraska. A genetic linkage map constructed spanned a length of 1541.3 cM, and generated 18 linkage groups that aligned to the 10 sorghum chromosomes. Fourteen QTLs (6 for brix, 3 for BY, 2 each for AD and MC, and 1 for PH) were mapped. QTLs for the traits that were significantly correlated, colocalized in two clusters on linkage group Sbi01b. Both parents contributed beneficial alleles for most of traits measured, supporting the transgressive segregation in this population. Additional work is needed on exploiting the usefulness of chromosome 1 in breeding sorghum for bioenergy.