Download or read book Effect of Host Genotype on Multiplication Distribution and Survival of Bean Common Blight Bacteria Xanthomonas Phaseoli written by Claudio R. Cafati and published by . This book was released on 1979 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Host pathogen Interaction and Breeding and Genetics of Resistance for Common Bacterial Blight of Common Bean Phaseolus Vulgaris L Caused by Xanthomonas Campestris Pv Phaseoli and X C Pv Phaseoli Var Fuscans written by Robert Wayne Duncan and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Common bacterial blight (CBB) caused by Xanthomonas campestris pv. phaseoli Smith (Dye) (Xcp, synonym: X. axonopodis pv. phaseoli [Smith] Vauterin et al.) and X. c. pv. phaseoli var. fuscans (Burkholder) Starr & Burkholder (Xcpf, synonym: X. fuscans subsp. fuscans sp. nov.) is the most important bacterial disease of common bean (Phaseolus vulgaris L.). Host resistance is the best method of management for this seed-borne disease. The first objective of this research was a host-pathogen diversity study, where new Xcp and Xcpf genotypes associated with CBB in Wisconsin were identified. These new genotypes, along with five previously reported genotypes, were inoculated onto 27 common bean genotypes having different combinations of CBB resistance QTL and markers. Eight host genotypes were identified that were resistant to all pathogen genotypes. The second objective was to compare direct disease selection (DDS) with marker-assisted selection (MAS) for the development of CBB resistant breeding lines, and the cost-effectiveness of the two selection methods. More CBB-resistant breeding lines were generated with DDS under conditions of high disease pressure in the greenhouse. However, under moderate disease pressure in the field, there were no significant differences between the two selection techniques. Under the parameters of this study, DDS was more cost-effective than MAS. Finally, the relationship between flower and seed color, CBB resistance, a CBB resistance SCAR marker (BC420) and the SOD12490 marker associated with the V pigmentation locus was investigated. In an F2 population and in the F3 progeny test, no recombination was found between colored flowers (purple [P] and lilac [L]), a dark undesirable DRK seed coat color and presence of the BC420 marker. All plants in the F2 and F3 that lacked the BC420 marker had white/lilac-striped (wl) flower color and the desirable DRK seed color. The SOD12490 marker was not linked with CBB resistance. Some plants with wl flowers were resistant but lacked the BC420 marker, indicating unidentified QTL in the CBB-resistant donor germplasm (VAX 3, Wilkinson 2, or I9365-25). Together, this information will facilitate the improvement of CBB resistance in all market classes of common bean.
Download or read book A Monographic Study of Bean Diseases and Methods for Their Control written by William John Zaumeyer and published by . This book was released on 1957 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pathogenic Variation in Common Xanthomonas Phaseoli and Fuscous Xanthomonas Phaseoli Var Fuscans Bacterial Blights of Bean Phaseolus Vulgaris L written by Ephraim J. A. Ekpo and published by . This book was released on 1975 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Host pathogen Interaction of the Tepary Bean Phaseolus Acutifolius with the Common Bean Blight Pathogen Xanthomonas Campestris PV phaseoli written by Mildred Zapata and published by . This book was released on 1989 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of an Improved Semi selective Medium for Xanthomonas Campestris Pv Phaseoli and Its Use in Characterizing Resistant Bean Germplasm written by Robert Bandoma Mabagala and published by . This book was released on 1987 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inheritance of Resistance of Phaseolus Vulgaris L dry Beans to Xanthomonas Phaseoli Dows common Blight written by Antonio Sidney Pompeu and published by . This book was released on 1971 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transcriptome Analysis of Common Bean Phaselous Vulgaris in Response to Infection by Bacterial Bight Pathogen Xanthomonas Axonopodis Pv Phaseoli written by Laura Cox and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most devastating diseases affecting common bean (Phaseolus vulgaris L.) production is common bacterial blight (CBB) caused by the bacterium Xanthomonas axonopodis pv. phaseoli (Xap). Breeding for resistant cultivars represents the best strategy for CBB immunity, but the molecular mechanisms underlying the interaction between P. vulgaris and CBB are little understood. A transcriptome analysis was undertaken to elucidate this plant-pathogen interaction in a CBB-resistant recombinant inbred line (RIL) and a CBB-susceptible RIL. A total of 800 differentially expressed genes were identified following Xap inoculation, with the majority upregulated in the CBB-resistant RIL 48 hours after inoculation. Upregulated genes included isoflavonoid biosynthesis genes. A metabolite analysis revealed that the isoflavonoids daidzein and genistein, and the phytoalexins coumestrol and phaseollinisoflavan accumulated in the CBB-resistant RIL. These findings are important for targeted breeding approaches aiming to enrich these phytoalexins in P. vulgaris as a strategy to enhance resistance to CBB.
Download or read book Abstracts on Field Beans Phaseolus Vulgaris L written by and published by . This book was released on 1978 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts on Field Beans Phaseolus Vulgaris L written by Centro Internacional de Agricultura Tropical. Bean Information Center and published by . This book was released on 1980 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantification and Transmission of Seed borne Xanthomonas Campestris Pv Phaseoli written by Lee Alan Rossmaessler and published by . This book was released on 1989 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bacterial Blights of Common Bean written by Michael Lennon O'Leary and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Common bean is a genetically diverse crop that is a staple food in many regions of the world. However, common bean is affected by numerous diseases that can negatively impact production. There are three major bacterial diseases of common bean: halo blight, caused by Pseudomonas syringae pv. phaseolicola (Psp), bacterial brown spot, caused by P. syringae pv. syringae (Pss), and common bacterial blight, caused by Xanthomonas axonopodis pv. phaseoli (Xap) and X. fuscans subsp. fuscans (Xff). Disease symptoms caused by Psp and Pss can be difficult to distinguish in certain common bean genotypes and under certain environmental conditions. Precise pathogen identification is important in terms of potential yield loss and the need for disease management. Symptoms with characteristics of both halo blight and bacterial brown spot were observed on a newly developed cultivar of dark red kidney beans in Wisconsin, and pseudomonads were recovered from all samples. To determine the etiology of this disease, a method of identification was developed that involved 1) PCR with primers specific for toxin genes utilized by Psp and Pss, 2) the ability to induce a hypersensitivity response in tobacco leaves, and 3) symptoms induced on common bean. When applied to the unusual disease phenotype on this dark red kidney variety most of these were atypical symptoms of halo blight. This method was then successfully applied to identify bacterial brown spot in disease samples from Oregon, and halo blight and bacterial brown spot in disease samples from Turkey. Xap and Xff strains induce identical symptoms on common bean but are genetically distinct species. Strains of Xap and Xff can be differentiated in culture by the production of a brown diffusible pigment by Xff strains. However, some Xap strains, particularly those that originate from East Africa, are more genetically related to Xff strains than to the globally predominant Xap strains, and show pathogenic variability on certain cultivars, e.g., Andean versus Middle American. To better understand the genetic diversity among Xap and Xff strains, the complete genome sequences of three globally predominant Xap strains, two East African Xap strains, three Xff strains, and one Xanthomonas spp. strain that is associated with common bean but not pathogenic were determined using long-read sequencing technology. Whole-genome alignment revealed differences in chromosome organization between Xap strains, East African Xap strains, and Xff strains; additionally, mobile element content is variable among these strains. Conserved genetic factors, e.g. conserved plasmids and type III secreted effector proteins, some of which may have been horizontally acquired by Xap and Xff strains, were identified. The brown diffusible pigment produced by Xff strains is the result of an oxidation product of homogentisic acid, which is referred to as pyomelanin. In the tyrosine catabolism pathway, homogentisic acid is produced by 4-hydroxyphenylpyruvate dioxygenase (HPPD) and converted to 4-maleylacetoacetate by homogentisate dioxygenase (HmgA). The complete genome sequences of Xap and Xff strains revealed that Xff strains have a conserved mutation in the hmgA gene, whereas Xap strains have an intact hmgA gene. HPPD deletion mutants in an Xff strain resulted in loss of pyomelanin (brown pigment) production, whereas deletion of hmgA in two Xap strains resulted in brown pigment production, making Xap colonies resemble those of wild-type Xff strains. Additionally, complementing a wild-type Xff strain with a functional hmgA gene eliminated visible pyomelanin accumulation. Finally, virulence of a Xff HPPD and a Xap hmgA deletion mutant was assessed on twelve bean cultivars, including both Andean and Middle American gene pools, with different levels of disease resistance to common bacterial blight. There was no significant differences in virulence between brown pigment mutants and wild-type strains.
Download or read book Bean Production Problems in the Tropics written by Howard F. Schwartz and published by Bernan Press(PA). This book was released on 1989 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Trends and Seed Transmission of Pseudomonas Phaseolicola in Susceptible and Tolerant Bean Genotypes written by Sara J. Stadt and published by . This book was released on 1980 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1980 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbiology Abstracts written by and published by . This book was released on 1981-05 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1981 with total page 1358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
