Download or read book Studies on the Inheritance of Resistance to Fusarium Root Rot in Beans written by Alonso Martinez Bravo and published by . This book was released on 1967 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inheritance of Resistance to Fusarium Root Rot in Phaseolus Vulgaris L and Phaseolus Coccineus L written by Hassan Ahmed Azzam and published by . This book was released on 1957 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progenies of two bean crosses were studied for inheritance of resistance to dry root rot caused by Fusarium solani f. phaseoli. O.S.C. 22 (P. vulgaris) was used in both crosses as the susceptible parent. A Mexican line (P. vulgaris) and a line 2014 of the runner bean (P. coccineus) were used as the tolerant (partially resistant) parents. Artificial inoculation was accomplished by dipping seeds in a thick emulsion of macerated agar media. A disease rating system of 0-5 was used, with 0 indicating no infection and 5 very severe infection. The disease average of all plants within a given seed lot was taken as the best indication for tolerance or susceptibility. The parents and their progenies were tested in both greenhouse and field. Differences between the reciprocal crosses of 22 x Mexican were not observed. The reciprocal cross of 22 x 2014 was not maintained due to the difficulty of securing seeds when 2014 was used as the female parent. In both crosses the F1 showed that tolerance was recessive. The observed ratios in the backcross generation of the cross 22 x Mexican fit the theoretical ratio of 1 tolerant to 7 susceptible indicating the action of three major genes. The F2 generation, in both crosses, showed a wider spread of disease ratings than either parent and occupied most, if not all, disease classes. The F2 generation of the cross 22 x 2014 indicated the possible action of two major recessive genes conditioning tolerance. The F2 of the cross 22 x Mexican exhibited no close fit to definite genetic ratios. Analysis of F3 data for the interspecific cross 22 x 2014 indicated that two or three major recessive genes conditioned the tolerance of P. coccineus. Difficulties of obtaining definite genetic ratios in this cross may be due to modifying genes, as well as to lack of exact control of environment in the various tests. The F3 progeny of 22 x Mexican indicated the possible action of three major recessive genes, or perhaps fewer major genes and several modifiers conditioning resistance. It is recognized that the results reported in this study represent an approximation for the inheritance of resistance to Fusarium root rot. There was no significant relation between root vigor of P. coccineus and resistance to root rot. Pigmentation in the cross 22 x Mexican indicated a simple inheritance of one dominant gene for pigmented over green. Seed color inheritance in the same cross indicated the interaction of two major genes and gave in the F2 a ratio of 9 black: 3 brown: 4 white. A very high association was observed between seed color and plant color. No clear relation between pigmentation and resistance to root rot was found. The recessive nature of resistance, the approximate estimation of genes involved, and the apparent freedom from serious linkage problems form a basis upon which to develop a breeding program designed to incorporate tolerance to root rot with horticulturally desirable characters in present day varieties of beans.
Download or read book Transmission of Fusarium and Pythium Root Rot Resistance in Beans written by Patrick O. Ongom and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fusarium root rot, caused by the fungus Fusarium solani f. sp Phaseoli is an important soil-borne disease affecting common bean (Phaseolus vulgaris L.) production in Uganda and many other countries. This pathogen exists in complexe with with Pythium ultimum var. ultimum, and resistance to these pathogens were thought to be linked. A study was initiated to elucidate the inheritance of F.solani resistance and to determine if this resistance is associated with P.ultimum resistance gene. This book uniquely enumirates the surprising outcome the study. Mostly few additive genes with epistatic modofications were found. Fusarium and Pythium resistance genes lacked co-inheritance.The book also displays important genetic principles that guide breeding decisions, and is quite handy for those in academia as well as practical plant geneticsts and breeders.
Download or read book Root Rots of Beans in Latin America and Africa written by George Samuel Abawi and published by CIAT. This book was released on 1990 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Major root rots of beans in Latin America and Africa; Minor root rots of beans in Latin America and Africa; Unreported root rots of beans in Latin America and Africa; Diagnosis of root rots in beans; Selected methodologies and techniques for research on root rots of beans; Management strategies for control of root rots of beans.
Download or read book Techniques for Evaluating Beans for Multiple Disease Resistance and Inheritance of Resistance to Uromyces and Fussarium in Sequential Inoculations written by Josias Correa de Faria and published by . This book was released on 1982 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Breeding for Resistance to Fusarium Root Rot in Bean Phaseolus Vularis L written by Kristin Ann Schneider and published by . This book was released on 1999 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inheritance of Resistance to Fusarium Solani F Phaseoli and Thielaviopsis Basicola in Phaseolus Vulgaris L written by Ahmed Abdel-Moneim Hassan and published by . This book was released on 1970 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book QTL Analysis of Resistance to Fusarium Root Rot in Andean Bean Populations and the Influence of Root Architecture on Disease Development written by Belinda Román Avilés and published by . This book was released on 2004 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigating the Genetic Control of Fusarium Root Rot Resistance in Snap Beans written by Abigail R. Huster and published by . This book was released on 2016 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Root rot diseases are a major constraint to bean (Phaseolus vulgaris L.) production around the world. Both snap beans and dry beans are affected. Root rot diseases can be caused by a variety of pathogens; however, Fusarium solani is a common causal agent. Fusarium root rot is a primary yield limitation of snap bean production in Oregon. Cultural control methods are ineffective and the pathogen will be present at the end of one season of production on previously clean land, indicating the need for genetic resistance. In order to address this need, a diversity panel of 148 snap bean varieties (the BeanCAP Snap Bean Diversity Panel) was evaluated for resistance to Fusarium root rot in Oregon. Morphological traits potentially involved in root rot resistance were also evaluated. Genome-wide association studies were conducted to locate SNPs associated with Fusarium root rot resistance, aboveground biomass, adventitious roots, taproot diameter, basal root diameter, deepest root angle, shallowest root angle, root angle average, root angle difference, and root angle geometric mean. Significant associations were located for all traits evaluated, including associations with root rot resistance on Pv02, Pv08, Pv09, and Pv10. Genomic estimated breeding values based on BLUPs and BLUEs were generated for each variety and trait. In order to investigate the genetic architecture of the diversity panel principal component analysis, a kinship heat map, and a neighbor-joining phylogenetic tree were generated. The first principal component axis separated varieties by center of domestication, while the second principal component axis separated European extra-fine beans from other Mesoamerican varieties. Kinship analysis demonstrated an average similarity coefficient between varieties of 0.67. The phylogenetic tree indicated two separate derivations of snap beans with extensive subsequent recombination. In this study we also converted previously published SNP markers associated with resistance to root rot diseases in snap bean into user-friendly INDEL and KASP markers to aid in the implementation of marker-assisted selection for resistance to root rot in snap bean.
Download or read book Inheritance of Disease Resistance on the Common Bean written by Gordon Peter McRostie and published by . This book was released on 1921 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inheritance of Resistance to Pythium Ultimum Trow in Snap Beans Phaseolus Vulgaris L written by David William York and published by . This book was released on 1975 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book QTL Analysis and Candidate Genes Identification Associated with Fusarium Root Rot Resistance in Common Beans Phaseolus Vulgaris written by Weijia Wang and published by . This book was released on 2016 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A I D Research and Development Abstracts written by and published by . This book was released on 1977 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Bulletin written by Virginia Agricultural Experiment Station and published by . This book was released on 1924 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Techniques for Evaluating Beans for Multiple Disease Resistance and Inheritance of Resistance to Uromyces and Fusarium in Sequential Inoculations written by J. C. Faria and published by . This book was released on 1982 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large populations of bean (Phaseolus vulgaris L.) plants were tested simultaneously or sequentially for resistance to up to three pathogens: Fusarium solani f. sp. phaseoli, Xanthomonas campestris pv. phaseoli and Uromyces phaseoli var. typica, or Xanthomonas campestris pv. phaseoli, Uromyces phaseoli var. typica and Isariopsis griseola.
Download or read book Genetic Resources of Phaseolus Beans written by Paul Gepts and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: The period following the second world war has witnessed an expanding commitment to incr~ased food production in tropical countries. Public and private initiatives at the national and international levels have led to the creation of programs geared specifically towards the improvement of food crops in tropical conditions. Examples of this increased commitment are the network of international agricultural research centers and numerous bilateral aid projects. As a consequence, crop improvement has become a truly worldwide endeavor, relying on an international network of institutions and collaborators. This holds also for Phaseolus beans. Following the discovery of the Americas, Phaseolus beans became distributed on all six continents. Yet, until not so long ago, most of the research on Phaseolus improvement took place in developed countries. In recognition of the nutritional importance of Phaseolus beans in developing countries, this has changed considerably in the last years, principally perhaps through the activities of the Centro Internacional de Agricultura Tropical (CIAT) and the International Board for Plant Genetic Resources (IBPGR). Consequently, the scope of the research on Phaseolus has broadened considerably and the number of Phaseolus researchers is larger than ever before.
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:
