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Showing 1 to 20 of 33 for “"Soybean germplasm"”.
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Screening Diverse Soybean Germplasm for Water-logging Tolerance
<p>Water-logging can be detrimental to soybean growth and development; effects range from chlorosis and stunting to yield loss and plant death. Soybean response to, and the effects of, water-logging are dependent on the growth-stage of the plant at the initiation of water-logging. The objectives of …
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Confirming QTL for seed yield from exotic soybean germplasm
The genetic improvement of soybean (Glycine max (L.)) cultivars in North America (N.A.) has, for the most part, been accomplished by intermating elite cultivars. This breeding strategy, combined with the limited N.A. genetic base, has resulted in a very narrow gene pool. Plant introductions (PI) …
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Physiological mechanisms of yield improvement in historical U.S. soybean germplasm
Soybean (Glycine max Merr.) is the world’s most widely grown leguminous crop and an important source of protein and oil for food and feed. Soybean yields have increased substantially throughout the past century with yield gains widely attributed to genetic advances and improved cultivars, as well …
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Characterization of Soybean Germplasm with Modified Phosphorus and Sugar Composition
The development of soybean [Glycine max (L.) Merr.] cultivars with modified phosphorus (P) composition has nutritional and environmental benefits, but poor seed germination and emergence presents challenges for commercial production. Different genetic mutations in two sources of germplasm, CX1834 …
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Phakopsora pachyrhizi growth in tissue of leaves from resistant and susceptible soybean germplasm
Soybean rust, caused by Phakopsora pachyrhizi, is one of the most potentially devastating foliar diseases of soybean, particularly in areas with mild winters. Tan lesions with two or more sporulating uredinia indicate a susceptible reaction. Resistance to soybean rust is characterized by the …
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AN ELECTROPHORETIC ANALYSIS OF THE GENETIC VARIATION IN THE WILD AND CULTIVATED SOYBEAN GERMPLASM
<p>Over 400 soybean (Glycine max (L.) Merr.) cultivars and plant introductions and more than 100 wild soybean (Glycine soja Sieb & Zucc.) plant introductions from a wide geographic distribution were examined by polyacrylamide, slab electrophoresis for genetic variation in 15 enzymes. Allozymes for …
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Evaluation and Identification of Soybean Aphid Resistance Sources and Mapping of Soybean Aphid Resistance Loci in Early Maturing Soybean Germplasm Accessions
<p>Soybean aphid (Aphis glycines Matsumura) has been a major pest of soybean [Glycine max (L.) Merr.] in North America particularly in the northern United States and three Canadian provinces. At least four biotypes of soybean aphid have been confirmed in the United States. Identification of soybean …
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Biology of Soybean Anthracnose Fungi and Their Interaction With Other Soybean Fungi (Colletotrichum, Synanamorph, Biocontrol)
… when on the midribs than in leaf laminae of soybean (Glycine max). Infection pegs were developed from appressoria that penetrated the epidemal cells. Discrete veinal necrosis of inoculated leaves was evident only with C. truncatum causing foliar anthracnose. Anthracnose severity was increased …
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Fine mapping of the protein QTL cqSeed protein-001 from PI 407788A and genome-wide association mapping in the soyNAM populations using DNA cytosine methylation
Soybean [Glycine max (L.) Merr.] is a leading source of vegetable protein and oil with dynamic uses in food, industry, and animal feed. Given the reduced genetic diversity resulting from rapid domestication and years of selective breeding, it is imperative to find new sources of genetic variation …
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Using Geographically Diverse High-Protein Germplasm to Simultaneously Improve Yield and Protein Percentage in Soybeans (Glycine Max Merr.)
… reported studies from a limited sampling of soybean germplasm have indicated that yield and protein percentage are negatively correlated. However, this may not reflect the situation present in the species as a whole.
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Evaluation of Diversity in Glycine Soja and Genetic Relationships Within the Subgenus Soja
… of the leaflet shape and size in the USDA Soybean Germplasm Collection and determining the genetic control of leaflet shape in G. soja. The F 2 progenies of eight G. max x G. soja and G. soja x G. soja crosses indicate at least two new loci controlling leaflet shape in G. soja. (Abstract …
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Evaluation of resistance in Glycine max to Fusarium virguliforme and in perennial Glycine species to Phakopsora pachyrhizi and Heterodera glycines
Soybean [Glycine max (L.) Merr.] averages approximately 40% protein and 20% oil and is one of the world’s most important crops. Production of the crop is increasing, especially in less developed countries. Occurrence of diseases and pests affecting soybean have increased as production has expanded …
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Molecular Analysis of Oomycete Pathogens to Identify and Translate Novel Resistance Mechanisms to Crops
… durable resistance (R) genes against P. sojae in soybean germplasm. We developed a system to screen soybean germplasm for genes that recognize core Phytophthora sojae RXLR effectors that are conserved within the pathogen species and essential for virulence. R genes that recognize these effectors …
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Soybean aphid intra-biotype variability based on colonization of specific soybean genotypes, resistance responses of soybean genotypes to pathogen infection after the application of chemical elicitors, and resistance to charcoal rot identified in ancestral soybean germplasm
The soybean aphid, Aphis glycines Matsumura (Hemiptera; Aphididae), is one of the most destructive insect pests of soybeans (Glycine max) in the United States. One method for managing this pest is through host plant resistance. Since its arrival in 2000, four aphid biotypes have been identified …
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Characterization of cytoplasmic diversity in soybean (Glycine max L. Merr) using mitochondrial markers
Soybean, <i>Glycine max</i> L. Merr, is used worldwide as an important source of protein and oil for a wide spectrum of edible feed and industrial purposes. Modem cultivars are derived from relatively few plant introductions (PIs) which severely limits diversity in soybean germplasm. The United …
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Environmental and genetic variation of the anti-cancer peptides lunasin and Bowman-Birk protease inhibitor in Glycine max
The economic importance of soybean (Glycine max) as a foodstuff has, in recent years, been supplemented by its importance as a source of bioactive compounds. Two of these compounds, the Bowman-Birk protease inhibitor (BBI) and the peptide lunasin, exhibit anti-cancer properties, and clinical …
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Identification, Validation, and Mapping of Phytophthora sojae and Soybean Mosaic Virus Resistance Genes in Soybean
… $43 billion annually, the cultivated soybean Glycine max (L.) Merr., is the second most valuable crop in the United States. Soybeans account for 57% of the world oil-seed production and are utilized as a protein source in products such as animal feed. The value of a soybean crop, …
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Effects of selective genetic introgression from wild soybean to soybean
Commercial soybean [Glycine max (L.) Merr.] breeding in the U.S. currently relies on a narrow genetic base in which more than half of the genetic contribution, calculated by pedigree analysis, comes from only 5 ancestral lines. For decades, but more intensely in recent years, efforts have been made …
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Quantitative Trait Loci (QTL) for Salt Tolerance in Soybean and Physiological Response to Salt Stress During Early Growth Stage
<p>Soybean is a major cash crop used as a source of high–quality protein and oil. Salt stress is one of the main abiotic stresses causing significant yield losses in soybean, which is considered a moderately salt–sensitive crop. Breeding selection is a promising strategy to improve salt tolerance …
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Genetic Analysis of the Resistance of Soybean Genotypes to Sclerotinia Sclerotiorum
… of this research were to: (i) evaluate soybean germplasm to identify new genetic sources of sclerotinia stem rot resistance; (ii) determine the inheritance of field resistance to sclerotinia stem rot in a cross between the partially resistant cultivars Asgrow 'A2506' (A2506) and Novartis …
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