Download or read book The Relationship Between Resistance to a Severe Strain BYMV S and the Type Strain BYMV of Bean Yellow Mosaic Virus in Phaseolus Vulgaris L written by Sara Patterson Tatchell and published by . This book was released on 1978 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty-eight bean breeding lines and cultivars were classified for resistance to bean yellow mosaic virus type strain 7634 (BYMV) and severe strain Gilbert 6 (BYMV-S). 'Great Northern U.I. 31' (G.N. 31) and breeding lines (S-lines) selected from a cross between G.N. 31 and O.S.C. 21 were chosen as parents for their resistance to one or both virus strains. Additional susceptible parents included 'Medford, ' 'Romano 1461,' and 'Dwarf Horticultural.' F1, F2, and F3 progeny were screened for resistance to BYMV and BYMV-S. F1 tests indicated resistance to be recessive for each virus strain. Possible complementary effects of genes from two resistant parents with similar genetic backgrounds were observed on susceptible F1, F2, and F3 plants for both virus strains. Modifying genes apparently obscured or reduced symptom expression in crosses involving the S-lines, G.N. 31, and 'Medford.' F3 tests were conducted on only five of the crosses. With crosses between 'Dwarf Horticultural' and G.N. 31 F3 tests indicated that two recessive genes controlled resistance as a 15/1 ratio susceptible: resistant was found for both virus strains. Although modifier effects and complementary gene action were proposed for the cross between the resistant parents, G.N. 31 and Sl-5-1, a two gene system was also suggested in the F3 as an acceptable nine: seven ratio was obtained in most cases. In addition, reciprocal differences were observed with Sl-5-1, 'Medford, ' and 'Dwarf Horticultural' as female parents. F3 tests were also used to determine the relationship of inheritance of resistance between the two virus strains. A partial relationship in the inheritance of resistance was found using chi square tests relating family classification of both strains and parental reactions. Using additional chi square tests and correlation coefficients a stronger relationship was found in the classification of families for severity of expression. In crosses where a positive relationship was not indicated, differences were attributed to possible cytoplasmic effects and complementary modifiers.

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 Genetic Relationship Between the Reaction of Dry Bean Genotypes Phaseolus Vulgaris L to Bean Common Mosaic Virus and Bean Yellow Mosaic Virus written by Martin Nyololani Mbewe and published by . This book was released on 1989 with total page 206 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 1994-08 with total page 1222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic and Molecular Basis of Resistance in Phaseolus Vulgaris Cv Othello to the Geminivirus Bean Dwarf Mosaic Virus BDMV written by Young-Su Seo and published by . This book was released on 2003 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book O S U Theses and Dissertations 1978 1982 written by Oregon State University and published by . This book was released on 1983 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the American Phytopathological Society written by American Phytopathological Society and published by . This book was released on 1974 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes abstracts of papers presented at the annual and divisional meetings of the society.

Download or read book Bean Production Problems in the Tropics written by Howard F. Schwartz and published by CIAT. This book was released on 1989 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first section reviews trends of bean production and constraints in Latin America and Africa. The second section covers fungal diseases. The third section, bacterial diseases. The fourth section, viral and mycoplasma diseases. The fifth section, insect pests. The last section, other bean production constraints, that is, nutritional disorders, nematodes, seed pathology, and additional problems.

Download or read book Applied Ecology Abstracts written by and published by . This book was released on 1979 with total page 724 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 Microbiology Abstracts written by and published by . This book was released on 1984 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Viruses and Virus Diseases of Vegetables in the Mediterranean Basin written by Gad Loebenstein and published by Academic Press. This book was released on 2012-06-25 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of Advances in Virus Research focuses on mycoviruses. The authors and reviews represent the most current and cutting-edge research in the field. A broad range of research is presented from research experts. Contributions from leading authorities Informs and updates on all the latest developments in the field

Download or read book Mechanism of Resistance to Bean Common Mosaic Virus Conferred by the I Locus in Phaseolus Vulgaris L written by Molly Melinda Cadle-Davidson and published by . This book was released on 2005 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determining the Mechanism of the Recessive Resistance to Bean Common Mosaic Virus BCMV Conferred by the Bc 1 and Bc 2 Recessive Genes in Common Bean and Biological and Molecular Characterization of a New Strain of BCMV written by Gardenia Edith Orellana Arreaga and published by . This book was released on 2019 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bean common mosaic virus (BCMV) is an important pathogen affecting common bean and other legumes. BCMV is an aphid-transmitted virus, which can also be seed-transmissible in common bean with efficiencies of up to 80%, depending on virus strain and bean cultivar. The virus belongs to the genus Potyvirus (family Potyviridae), having an approximately 10-kb single-stranded, positive-sense RNA genome. BCMV resistance in common bean is governed by one dominant (I) gene and four recessive (bc-u, bc-1, bc-2, and bc-3) genes which are deployed by breeders in different combinations to protect commercial bean cultivars against the virus. The dominant I gene confers extreme resistance or immunity against all strains of BCMV when the temperature stays below 30°C, and variable types of local and systemic necrosis when temperature exceeds 30°C. The bc-3 gene was identified as an eIF4E translation initiation factor gene mediating resistance through disruption of the interaction between this protein and the VPg protein of the virus. The mode of action of bc-1 and bc-2 in expression of BCMV resistance was unknown until this work. To investigate the possible role of both bc-1 and bc-2 genes in replication, cell-to-cell, and long distance movement of BCMV in P. vulgaris, we tested virus spread of eight BCMV isolates representing pathogroups I, IV, VI, VII, and VIII, in a set of bean differentials expressing different combinations of six resistance alleles including bc-u, bc-1, bc-12, bc-2, bc-22, and bc-3. The data suggest that bc-1 and bc-2 recessive resistance genes have no effect on the replication and cell-to-cell movement of BCMV, but affect systemic spread of BCMV in common bean. The BCMV resistance conferred by bc-1 and bc-2 and affecting systemic spread was found only partially effective when these two genes were expressed singly. The efficiency of the restriction of the systemic spread of the virus was greatly enhanced when the alleles of bc-1 and bc-2 genes were combined together.Beside common bean, there are other crop legumes that are susceptible to BCMV, such as peanut, soybean, and azuki bean. In this thesis, I described a new strain of BCMV from lima bean with distinct biological and molecular characteristics found in Honolulu, HI. This new BCMV strain, BCMV-A1, was able to partially overcome resistance to the virus conferred by bc-1 and bc-2 alleles in common bean, establishing an asymptomatic systemic infection in some common bean cultivars. Later, two BCMV isolates were found in commercial common bean samples in Idaho exhibiting 99% identity to BCMV-A1 in partial genome sequence. This new BCMV strain from lima bean, BCMV-A1, may present a threat for the common bean production.

Download or read book Virology Abstracts written by and published by . This book was released on 1979-07 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agrindex written by and published by . This book was released on 1995 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seed borne plant virus diseases written by K. Subramanya Sastry and published by Springer Science & Business Media. This book was released on 2013-01-05 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seeds provide an efficient means in disseminating plant virus and viroid diseases. The success of modern agriculture depends on pathogen free seed with high yielding character and in turn disease management. There is a serious scientific concern about the transmission of plant viruses sexually through seed and asexually through plant propagules. The present book provides the latest information along with the total list of seed transmitted virus and viroid diseases at global level including, the yield losses, diagnostic techniques, mechanism of seed transmission, epidemiology and virus disease management aspects. Additional information is also provided on the transmission of plant virus and virus-like diseases through vegetative propagules. It is also well known that seed transmitted viruses are introduced into new countries and continents during large-scale traffic movements through infected germplasm and plant propogules. The latest diagnostic molecular techniques in different virus-host combinations along with disease management measures have been included. The book shall be a good reference source and also a text book to the research scientists, teachers, students of plant pathology, agriculture, horticulture, life sciences, green house managers, professional entrepreneurs, persons involved in quarantines and seed companies. This book has several important features of seed transmitted virus diseases and is a good informative source and thus deserves a place in almost all university libraries, seed companies and research organizations.