Download or read book Soybean Disease Pressure in Illinois and the Inheritance of Brown Stem Rot Resistance written by Samuel Ray Eathington and published by . This book was released on 1992 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Advantages and Inheritance of Brown Stem Rot Resistance in Soybeans and the Implications to Breeding for Resistance written by Scott Anthony Sebastian and published by . This book was released on 1984 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Brown Stem Rot Resistance in Soybean written by Michael Stuart Bachman and published by . This book was released on 1999 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigations Into the Genetic Basis of Resistance to Brown Stem Rot in Soybean written by Megan Elise Patzoldt and published by . This book was released on 2004 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soybean Diseases in Illinois written by Donald W. Chamberlain and published by . This book was released on 1973 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agronomic and Molecular Marker Mapping of Brown Stem Rot Phytophthora Root Rot and Powdery Mildew Resistance in Soybean written by David Glenn Lohnes and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Diseases are a major factor limiting the yield of soybean (Glycine max (L.) Merr.). Brown stem rot of soybean, caused by Phialophora gregata (Allington and Chamberlain) W. Gams, and phytophthora root rot, caused by Phytophthora sojae Kaufmann & Gerdemann, are major diseases of soybean in Illinois. A gene for resistance to powdery mildew, caused by Microsphaera diffusa Cke. & Pk., has also been found to be linked to a gene for phytophthora resistance. A field study was conducted to determine yield differences between isolines carrying different alleles at the locus for powdery mildew resistance, greenhouse experiments were performed to study the inheritance of brown stem rot resistance, and laboratory experiments were conducted in attempts to find molecular markers linked to brown stem rot, phytophthora, and powdery mildew resistance in soybean. When isolines carrying alleles for powdery mildew resistance are compared, the resistant isolines yielded 7% more than the adult-plant resistant isolines. With this yield advantage, it would be advantageous to use complete resistance to powdery mildew as a marker to select for phytophthora resistance in a soybean breeding program. Classification of reaction to brown stem rot of soybean populations indicates that a Clark isoline contains Rbs3, and that a germplasm line deriving resistance from PI 90.138 contains Rbs1 and another unknown resistance gene. Molecular marker analysis of Harosoy and a Harosoy brown stem rot isoline did not produce any polymorphic markers. Clark, Harosoy, and Williams were screened with several RAPD primers to determine the random amplified polymorphic DNA (RAPD) variability present between these cultivars. The percentage of RAPD products in common was 94% for Clark and Williams, 90% for Clark and Harosoy, and 84% for Harosoy and Williams. The material cost of running a single RAPD reaction ranged from 21 to 76 cents. Linkage analysis of the restriction fragment length polymorphism and disease classification revealed that the loci studied are in classical linkage group 19 and RFLP linkage group J, in the most likely order Rps2 Rmd Rj2 pA233 pA724 pK375. This is the most agronomically important gene-dense region of the soybean molecular map identified to date.

Download or read book Soybean Resistance to Brown Stem Rot written by Megan Elise Kirsch and published by . This book was released on 2001 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Genetics and Differential Pathogenicity of the Soybean Brown Stem Rot Pathogen Phialophora Gregata written by Xiangqi Meng and published by . This book was released on 2001 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soybean and Phialophora Gregata Interactions written by Robert Stephen Waller and published by . This book was released on 1991 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resistance of soybean to brown stem rot (BSR), caused by Phialophora gregata (Allington and Chamberlain) W. Gams, has become an important aspect of soybean breeding programs in the north central United States. The discovery of variability of P. gregata isolates from different states has increased the interest in BSR research. The objectives of this study were to further investigate interactions between P. gregata and soybean by studying: (1) the inheritance of resistance to BSR in the soybean cultivar Asgrow A3733, (2) the effects of culturing the fungus on different sources of soybean media, and (3) the effects of field fertility levels on BSR development on soybean. The inheritance study showed a different genetic control for resistance to BSR than has been previously reported. The relatively large number of intermediate disease reaction types in progeny from crosses involving A3733 and susceptible parents indicates the presence of a minor or modifier gene. A genetic model was proposed based on one gene with a major effect (probably dominant) and a second gene with a minor effect for BSR resistance. This appears to be a unique source of resistance to BSR that can be incorporated into breeding programs along with other known sources of resistance. Culturing P. gregata on soybean stem agar and seed broth prepared from BSR-resistant or -susceptible soybean produced varying results. The use of certain resistant soybean as media source caused the pathogen to be much less aggressive. When susceptible soybean were used to prepare media for inoculum production, typical disease reactions were observed for BSR-resistant and susceptible soybean. Soybean plants grown on a low field fertility level had greater development of BSR stem symptoms on BSR-susceptible and resistant soybean as compared to being grown on a field with a high fertility level. Leaf symptoms are not observed every year and may appear too late in the growing season to be rated on early maturing soybean plants. Differences between resistant and susceptible soybean genotypes were greater in low fertility. Selection for BSR resistant plants in the field may be enhanced with conditions of low fertility.

Download or read book Epidemiology of Brown Stem Rot of Soybeans in Wisconsin written by Alemu Mengistu and published by . This book was released on 1985 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Progress at the Illinois Agricultural Experiment Station written by University of Illinois at Urbana-Champaign. Agricultural Experiment Station and published by . This book was released on 1992 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Progress in Solving Some Farm Problems of Illinois written by University of Illinois at Urbana-Champaign. Agricultural Experiment Station and published by . This book was released on 1992 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EXAMINATION OF THE VASCULAR WILT SYNDROME OF BROWN STEM ROT OF SOYBEAN written by GARY WAYNE SIMONE and published by . This book was released on 1975 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soybean Disease Research on Green Stem Disorder Effects of Seed Treatments on Sclerotinia Stem Rot and Resistance to Cercospora Leaf Blight written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agronomy News written by and published by . This book was released on 1993 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.

Download or read book The Development of Brown Stem Rot in Resistant and Susceptible Soybeans written by Charles Chester Kusek and published by . This book was released on 1981 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Colonization of Brown Stem Rot Resistant and Susceptible Soybean Varieties by Phialophora Gregata and Other Fungi During the Growing Season written by Carmen Alicia Martorell de Milla and published by . This book was released on 1980 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: