Download or read book Interaction Between Soybean and Phytophthora Sojae written by Richard Alfred Leitz and published by . This book was released on 1999 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Novel Data driven Approaches to Elucidate Interactions Between Soybean and Phytopthora Sojae written by Thivanka Sandaruwan Ratnayake and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytophthora sojae is a soil-borne oomycete and the causal agent of Phytophthora stem and root rot (PSR) in soybean (Glycine max [L.] Merrill). The study couple high-throughput sequencing data, bioinformatics tools, and machine learning to elucidate molecular features in soybean following infection by P. Sojae as well as understand how P. Sojae evolve. We identified differentially expressed genes during compatible and incompatible interactions with P. sojae. Based on DNA Affinity Purification sequencing (DAP-seq) data, we trained a Deep Neural Network with convolution and recurrent layers to predict new target sites in the DE genes. We used 47 P. sojae isolates from the host rotation study and conducted variant calling analysis. According to genome-wide SNPs, population structure analysis indicates that there is a link between host resistant and mutations patterns in the pathogen. However, examination of the loci of 11 essential Avr genes does not support the hypothesis.

Download or read book Phytophthora Sojae Infecting Soybean written by Rawnaq Nazneen Chowdhury and published by . This book was released on 2017 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactions of Soybean Plant Introductions PI273483 to PI427107 Following Inoculation with Phytophthora Sojae written by Anne Elizabeth Dorrance and published by . This book was released on 2001 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Races of the Pathogen Phytophthora Sojae Found in Michigan and Factors Affecting Root Rot of Soybean written by Richard Chemjor Kaitany and published by . This book was released on 2000 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultrastructural and Immunocytochemical Studies of Compatible and Incompatible Interactions of Soybean Roots Infected with the Oomycete Phytophthora Sojae written by Katalin Enkerli-Majoros and published by . This book was released on 1996 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Understanding silicon mediated disease resistance through the interaction soybean Phytophthora sojae written by Aliyeh Rasooli Zadeh and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Résumé en anglais

Download or read book Phytophthora written by Kurt Lamour and published by CABI. This book was released on 2013 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book begins with an account of the early history of Phytophthora research and the tumultuous events setting the genus in motion. In keeping with its controversial inception, the chapter on taxonomy and phylogeny makes a compelling case that our current notion of Phytophthora as a genus is illusory. This chapter sets the stage for the importance of molecular tools on these enigmatic pathogens. The following chapters discuss species identification, population-level investigation, interspecific hybrids and the impact of diverse Phytophthora species on crops, forests, nurseries, greenhouses and natural areas worldwide.

Download or read book Interaction Between Two Glycine Species and Phytophthora Sojae written by Meredith Eve Gardner and published by . This book was released on 2001 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spatial and Temporal Analysis of Chitinase Accumulation and Pathogen Colonization in Soybeans with Tolerance to Phytophthora Sojae Infection written by Kitrina Murie Carlson and published by . This book was released on 2003 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tolerance to Phytophthora root rot (PRR) in soybean is a highly-heritable, multi-genic trait. Tolerance is a desirable trait in soybean lines because it is not race-specific and cannot be overcome by a buildup of a specific Phytophthora sojae races, unlike race-specific, single gene resistance. The plant-pathogen interactions occurring in the tolerant reaction to disease have not been thoroughly characterized. The objective of this research was to characterize components of the plant-pathogen interaction occurring in tolerant soybeans infected with P. sojae that may be involved in limiting pathogen colonization and disease development. One important aspect of this interaction is the timing of localized and systemic defense responses. Using chitinase as a marker of defense response activation, I characterized spatial and temporal patterns of chitinase isoform expression. I found that unique chitinase isoforms accumulate in soybean roots infected with P. sojae . Some of these isoforms are expressed earlier in tolerant cultivars than in susceptible cultivars and some of these isoforms are expressed systemically in tolerant cultivars and only locally in susceptible cultivars. This has helped to elucidate differences in the plant defense response between tolerant and susceptible cultivars. Another important component of this interaction is the events involved in pathogen colonization of the root. To analyze the timing and extent of P. sojae colonization of the soybean root system, I utilized real-time PCR to detect and quantify P. sojae within the soybean root system. My results suggest P. sojae colonizes tolerant cultivars more slowly and to a lesser degree than susceptible cultivars.

Download or read book Inheritance of Virulence in the Root Rot Pathogen Phytophthora Sojae written by Sirjana Devi Shrestha and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The oomycete Phytophthora sojae causes stem and root rot of soybean plants. The interaction of pathogen avirulence (Avr) and host resistance (R)-genes determine the disease outcome. The Avr3a mRNA transcript level is variable among P. sojae strains and determines virulence towards the R-gene Rps3a. To study the inheritance of virulence, genetic crosses and self-fertilizations were performed. A cross between P. sojae strains ACR10 and P7076 causes transgenerational gene silencing of Avr3a allele, and this effect is meiotically stable up to the F5 generation. However, test-crosses of F1 (Avr3aACR10/Avr3aP7076) with strain P6497 result in expression of Avr3a in all progeny and release of silencing of the Avr3aP7076 allele. Progeny from P6497 X ACR10 crosses showed unusual inheritance for Avr3a expression. Overall, we conclude that Avr3a gene silencing is strain specific and could rely on epistatic factors. This study will lead to a better understanding of infection and virulence mechanisms that will help to better manage and safeguard soybean production.

Download or read book Integrated Management of Phytophthora Stem and Root Rot of Soybean and the Effect of Soil applied Herbicides on Seedling Disease Incidence written by Vinicius Castelli Garnica and published by . This book was released on 2019 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean seedling diseases and Phytophthora stem and root rot (PSRR; caused by Phytophthora sojae) are two of the most economically important diseases in North Central U.S. Remarkable differences in disease incidence occur each year, which demonstrate that abiotic and biotic factors must interact for disease onset and development. During 2017 and 2018, field studies were conducted to (i) address the efficacy of seed treatment and genetic resistance for PSRR management on soybean population, canopy coverage (CC), and yield, and (ii) investigate potential interactions between pre-emergence (PRE) herbicides and the incidence of seedling diseases in alluvial soils in Nebraska. Despite field history, PSRR developed in only four of six environments studied. Commercial seed treatment had a positive effect on plant population density, CC, and yield in at least three environments. Compared to non-treated control, seed treatment increased emergence between 11,600 to 53,700 plants ha-1 and early-season CC between 0.7 to 1.2%. Under high disease pressure, management programs using moderately resistant cultivars improved yields when compared to moderately susceptible cultivars. By contrast, minimum yield differences were detected between Rps1k andRps1c genotypes, except in one environment. While a weak to moderate correlation was observed between CC and incidence of P. sojae symptomatic plants, a moderate to strong association was found between CC and yield. Across multiple environments, PRE herbicides chlorimuron-ethyl, metribuzin, saflufenacil, sulfentrazone, and flumioxazin had no impact on seedling root rot (disease severity index; DSI) when compared to the non-treated control. Similarly, no significant differences between PRE herbicides were detected on plant population, plant height, and yield. Community composition depicting primary pathogenic genera Fusarium, Phytophthora, Pythium, and Rhizoctonia did not occur at random but rather varied across environments and DSI classes. In two of the three environments, Phytophthorastructured approximately 22% of primary pathogenic genera, whereas, Rhizoctoniarecovery was low (

Download or read book Oomycete Genetics and Genomics written by Kurt Lamour and published by John Wiley & Sons. This book was released on 2009-06-17 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together the knowledge from and tools for genetic and genomic research into oomycetes to help solve the problems this pathogen poses to crops and animals. Armed with the information presented here, researchers can use oomycete data to solve practical problems and gain insight into future areas of interest. Key Features: Offers an up-to-date coverage of research into oomycetes – which has advanced with biochemical and molecular analyses in recent years Helps researchers use oomycete data to solve practical problems, like damage to crop and animal resources Includes a section on interactions with animal hosts Offers perspective on future areas of research Assembles an international author base

Download or read book The Relationship Between Tolerance to Phytophthora Root Rot and Yield of Soybean written by Daniel R. Scott and published by . This book was released on 1992 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Temperature Induced Compatibility in the Host pathogen Interaction Between Soybean and Phytophthora Megasperma F sp Glycinea written by Debbie C. Classen and published by . This book was released on 1985 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Identification and Dissection of Soybean QTL Conferring Resistance to Phytophthora Sojae written by Hehe Wang and published by . This book was released on 2011 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Phytophthora root and stem rot is the second most serious soybean disease in the USA. Partial resistance in soybean confers a broad-spectrum resistance to Phytophthora sojae and is expressed as reduced infection efficiency, smaller root lesions and reduction in oospore production, and is conferred by quantitative trait loci (QTL). In several host-pathosystems, the detection of an individual QTL differed depending on the specific pathogen isolate or phenotypic assay that was used. In soybean-P. sojae interaction, few broad-spectrum QTL have been identified and very little is known about the molecular mechanisms that contribute to this trait. The hypotheses for this study were that: i) there were more QTL in soybean conferring resistance to P. sojae; ii) soybean QTL with minor effect would respond differentially to P. sojae isolates and phenotypic assays; iii) candidate genes underlying the QTL vary in sequence between the resistant and susceptible genotypes, as well as different expression response during P. sojae infection; and iv) a complex network of defense-pathways is underlying each soybean QTL conferring resistance to P. sojae. Thus the first objective of this study was to map soybean QTL conferring broad-spectrum resistance to P. sojae in the soybean cultivar 'Conrad'. A F 4:6 population from a cross of Conrad and susceptible 'Sloan' was challenged with three P. sojae isolates using two different phenotypic assays. Ten QTL were identified on Chr. 8, 12, 13 (13-1, 13-2), 14, 17, 18 (18-1, 18-2), and 19 (19-1, 19-2). Of these, the QTL 18-2, 19-1, and 19-2 from Conrad, responded to multiple isolates as well as both phenotypic assays, and explained the largest percent of phenotypic variation. RILs with resistance alleles at these QTL had significantly higher yields than those with susceptible alleles in a P. sojae infested field. These QTL were further confirmed in the Conrad x Sloan F 6:8 population. These results indicate these three QTL as the best candidates for resistance breeding. The second objective of this study was to identify the candidate genes conferring partial resistance under these QTL. Microarray analysis identified genes with significantly different expression patterns between Conrad and Sloan, both constitutively and following inoculation. Of these genes, those co-localized with the QTL encoded proteins with unknown functions, or proteins related to defense or physiological traits. Seventeen genes were selected and their expression patterns were confirmed by qRT-PCR. The QTL 19-1 and 19-2 were further dissected by sequence and expression analysis of genes between the resistant and susceptible genotypes. A total of 1025 SNPs were identified between Conrad and Sloan through sequencing of 153 genes. A list of candidate genes with significantly different infection response between the resistant and susceptible lines were identified, including those involved in signal transduction, hormone-mediated pathways, plant cell structural modification, ubiquitination, and basal resistance. These findings suggest a complex defense network with multiple mechanisms underlying individual soybean QTL conferring resistance to P. sojae. Overall, this study will contribute to soybean resistance breeding by providing additional QTL, candidate genes and SNP markers for marker-assisted resistance breeding.

Download or read book Some Physiological Aspects of the Soybean Phytophthora Megasperma F Sp Glycinea Interaction written by Madan Kumar Bhattacharyya and published by . This book was released on 1987 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: