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 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 Evaluation Genetic Control and QTL Analysis of Sclerotinia Stem Rot Resistance in Soybean microform written by Jérôme Auclair and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2004 with total page 147 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 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 Mapping of Brown Stem Rot Resistance Genetic Yield Gains and Yield Impact of Soybean Cyst Nematode written by Keith Franklin Rincker and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 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 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:
Download or read book Differential Reactions of Soybean Genotypes to Phialophora Gregata Isolates written by Gavin René Sills and published by . This book was released on 1990 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Evaluation of Soybean Germplasm for Additional Sources of Resistance and Characterization of Resistance Towards Fusarium Graminearum written by Bhupendra Acharya and published by . This book was released on 2014 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fusarium graminearum was recently established as a primary pathogen of soybean causing seed rot and seedling root rot. Initial symptoms start as water soaked lesions which turn light brown or have pink discoloration at the later stages of disease development. The objective of this study was to evaluate soybean genotypes for resistance towards F. graminearum and to characterize resistance using recombinant inbred lines (RILs) of two soybean populations: 'Wyandot' x PI567301B and 'Conrad' x 'Sloan'. All of the soybean germplasm, the parents and the RILs of the mapping populations were evaluated for resistance using the roll towel assay in either a randomized complete block design or augmented randomized incomplete block design. In this study, two hundred soybean genotypes were evaluated for resistance of which thirty had disease severity index ratings of less than 50% to F. graminearum indicating moderate to to high levels of resistance. Two of these genotypes, PI 567301B and 'nrad' were identified with high and moderate levels of resistance to F. graminearum respectively. The genotypes were available in two mapping populations of 184 and 330 recombinant inbred lines (RILs) in a 'Wyandot' x PI 567301B and 'Conrad' x 'Sloan', respectively. Both populations were phenotyped as described above and were genotyped using Infinium BARCSoySNP6K BeadChip array. Linkage maps and QTL analysis were constructed using JoinMap4 and MapQTL5. Using composite interval mapping, one major QTL on chromosome 8 and one minor QTL on chromosome 6 were identified in the 'Wyandot' x PI 567301B population which explained 38.5% and 8.1% of the phenotypic variance, respectively. In the 'Conrad' x 'Sloan' population, three QTL were identified on chromosomes 10, 14, and 19 which explained 6.2, 4.8, and 8.9% the phenotypic variance, respectively. The QTL on chromosome 19 mapped to the region with QTL conferring resistance to Phytophthora sojae and Pythium irregulare. The QTL identified in the study will be useful in developing cultivars with resistance to F. graminearum.
Download or read book Agronomic and Molecular Marker Mapping of Brown Stem Rot Phytophtora 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 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pest Management in Soybean written by L.G. Copping and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the third in a series of volumes on major tropical and sub-tropical crops. These books aim to review the current state of the art in management of the total spectrum of pests and diseases which affect these crops in each major growing area using a multi-disciplinary approach. Soybean is economically the most important legume in the world. It is nutritious and easily digested, and is one of the richest and cheapest sources of protein. It is currently vital for the sustenance of many people and it will play an integral role in any future attempts to relieve world hunger. Soybean seed contains about 17% of oil and about 63% of meal, half of which is protein. Modern research has developed a variety of uses for soybean oil. It is processed into margarine, shortening, mayonnaise, salad creams and vegetarian cheeses. Industrially it is used in resins, plastics, paints, adhesives, fertilisers, sizing for cloth, linoleum backing, fire extinguishing materials, printing inks and a variety of other products. Soybean meal is a high-protein meat substitute and is used in the developed countries in many processed foods, including baby foods, but mainly as a feed for livestock. Soybean (Glycine max), which evolved from Glycine ussuriensis, a wild legume native to northern China, has been known and used in China since the eleventh century Be. It was introduced into Europe in the eighteenth century and into the United States in 1804 as an ornamental garden plant in Philadelphia.
