Download or read book Mechanical Damage Resistance of Two Isogenic Lines and a Commercial Cultivar of Snap Bean Phaseolus Vulgaris L Seeds written by Admir Pancas Mahomed Bay and published by . This book was released on 1994 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 1000 Doctoral Theses by Mozambicans or about Mozambique written by Paulus Gerdes and published by Lulu.com. This book was released on 2013 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The books presents in historical order information (author, year, title, university, country) about 535 doctoral theses written by Mozambicans and about 544 doctoral theses about Mozambique written by foreigners. Universities of 33 countries have awarded these doctoral degrees. Includes alphabetic and thematic indices, and various tables (2013, 236 pp.)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1994 with total page 458 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 1996 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1994 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1993 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyramiding Quantitative Trait Loci Conditioning Partial Resistance to Sclerotinia Sclerotiorum in Bush Blue Lake Green Beans Phaseolus Vulgaris written by Miles Andrew Barrett and published by . This book was released on 2010 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sclerotinia sclerotiorum (Lib.) de Bary is a necrotrophic pathogen capable of causing white mold, a severe disease in common bean. White mold is of particular concern to the Oregon snap bean processing industry, where processors allow less than 3% incidence in harvested shipments. Breeding for white mold resistance in beans has been difficult due to quantitative inheritance and low heritability. We combined two quantitative trait loci (QTL) for physiological resistance to white mold: a QTL located on linkage group 7 from G122 and a B8 QTL from NY6020. The B7 QTL is linked to phaseolin for which a sequence characterized amplified region (SCAR) marker phaseolin has been used successfully to transfer the QTL in dry bean. The transfer in snap bean is more challenging because this QTL is also linked to the p locus which conditions the white-seeded trait. While most snap beans have T phaseolin seed protein, the OSU bush blue lake (BBL) materials have the S form of phaseolin, facilitating the use of T phaseolin as a selectable marker in breeding for white mold resistance. Thus, transfer of this QTL has to be coupled with breaking the linkage between colored seed and the resistance QTL. The B8 QTL is linked to the SS181650 SCAR and AW191200 random amplified polymorphic DNA (RAPD) markers. Oregon State University BBL bean germplasm originally developed with single QTL were crossed to pyramid the two resistance QTL. The assumptions made in combining these two sources of resistance are that the QTL are non-allelic and are additive. OSU 6229, OSU 6230, and OSU 6241 are advanced breeding lines that have the SS181650 allele from NY6020 and show statistically significant higher levels of resistance in the field and greenhouse (straw) test compared to susceptible cultivars. White-seeded, T phaseolin types were selected from a OR 91G x G122 BC2F3 population. The selected lines showed levels of resistance significantly better than the susceptible check cultivars in the straw test. The two sources were crossed and the progeny were subjected to three or more generations of phenotypic selection in the straw test. One hundred and forty eight families were planted in a randomized complete block design (RCBD). All families had been previously genotyped using the PHAS and SS181650 SCAR molecular markers. Plants were inoculated using actively growing mycelium of S. sclerotiorum and scored using a modified straw test to test for genetic additivity among marker classes. None of the lines were statistically more resistant than G122, a QTL donor and standard resistant check. In a separate study, data collected in NY6020-5 x OR 91G and NY6020-5 x OSU 5613 populations suggest that NY6020-5 has a B7 QTL equivalent to G122. Other researchers have presented evidence that G122 has a B8 QTL equivalent to NY6020. Finally in a mixed linear model study we identified two markers, B181500 and C81200, which should prove useful in breeding for white mold resistance. While the material that we developed does not show significantly higher levels of resistance than the resistant parents, we have transferred the resistance QTL into a bush blue lake background, and the lines derived from this work should have significantly higher levels of resistance than existing commercial cultivars. We also present evidence of a QTL not previously identified in NY6020-5.
Download or read book Combining Common Bean Rust Resistance and Heat Tolerance in Snap Beans Phaseolus Vulgaris L for Eastern Africa written by Charles Juma Wasonga and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Common bean rust caused by Uromyces appendiculatus (Per.:Pers) Unger, and heat stress limit snap bean production in many tropical and temperate regions. Snap beans that combined broad-spectrum rust resistance with heat tolerance in the same genetic backgrounds were developed and selected for tropical agroecosystems. Eight breeding populations were developed from combination of 'BelJersey-RR-15' and 'BelFla-RR-1' (each containing the Ur-4 and Ur-11 rust resistance genes) and heat tolerant snap bean breeding lines 'HT601', 'HT603', 'HT608' and 'HT611'. Three heat tolerant F5 lines which were homozygous for the Ur-4 and Ur-11 genes were selected. The three selected F5 lines and a rust resistant but heat sensitive control were together with 12 cultivars evaluated in 2009 for reaction to natural rust infection and yield at six contrasting field sites in East Africa and response to heat stress verified in Puerto Rico. Rust incidence and severity was high at three sites. Three of the four breeding lines and only two of the 12 cultivars were rust resistant. The breeding lines showed stable yields in East Africa compared to cultivars currently grown in the region. Yield in Puerto Rico strongly correlated (R2=0.71, P[LESS THAN]0.001) with that of the hottest site in East Africa, highlighting similarity in genotypic response to high temperatures at the two distinct sites. This research demonstrated the effectiveness of Ur-4 and Ur-11 rust gene combinations in tropical environments, and effective selection for heat tolerance correlating across multiple environments. The three breeding lines with proven rust resistance and heat tolerance were utilized in crosses with cultivars currently grown in East Africa with the aim of improving snap beans for the region for the two traits. Twenty breeding lines were selected from the populations developed, evaluated and selected at four distinct field sites in East Africa in 2010. Four high yielding breeding lines ('L5', 'L9', 'L13' and 'L17') that showed high promise with rust resistance and heat tolerance in desired plant types were selected. Advancement and subsequent release of these selections as cultivars and utilization in breeding programs will improve production of snap bean in eastern Africa and other tropical environments with similar production constraints.
Download or read book Bruchid Resistance and Agronomic Traits of Cultivated Bean Lines Phaseolus Vulgaris L Containing Arcelin Seed Protein Alleles from Wild Beans written by Rhea Louisa Howard Harmsen and published by . This book was released on 1989 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response of Certain Varieties of Snap Bean Phaseolus Vulgaris to Seed Treatments written by Adah Elisabeth Polak Cohn and published by . This book was released on 1949 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inheritance of Yield Yield Components Number of Days to Flowering Plant Height and Incidence of Interlocular Cavitation of Pods in Snap Beans Phaseolus Vulgaris L written by Ibnouf Ali Hamad and published by . This book was released on 1975 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of the study presented herein were: 1) to use the diallel cross analysis to determine the genetic basis of yield (as total pod weight, number of days to first flower, plant height, height of attachment of the highest and lowest pod and incidence of interlocular cavitation of pods in five selected cultivars of snap bean, Phaseolus vulgaris L.; 2) To determine the inheritance of seed yield per plant (as total number of seeds per plant), number of pods per plant, 100-seed wight and number of seeds per pod; 3) To determine the correlations between seed yield and each component of yield and the correlations among yield components.
Download or read book Resistance in Snap Beans Phaseolus Vulgaris L to Adult Western Spotted Cucumber Beetle Diabrotica U Indecimpunctata Mann written by Elameen M. A. Eltoum and published by . This book was released on 1979 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies to evaluate resistance in snap beans, Phaseolus vulgaris L. to adult western spotted cucumber beetles, Diabrotica u. undecimpunctata Mann. were conducted in greenhouse cages, field cages, field plots, and in temperature controlled cabinet in the laboratory. Results showed that there were differences in susceptibility to adult feeding injury between 12 selected snap bean cultivars. Spartan Arrow, Green Isle, Resistant Cherokee Wax, Itasca, and Oregon 1604 showed a higher level of resistance, whereas Blue Crop, Blue Max, Green Ruler, Bush Blue Lake, and Bush Hort. #4 were most susceptible. Beetle injury affected bean grades and damage by beetles exceeded the one percent level accepted by processors for grade A beans in all cultivars tested. Adult beetles preferred young succulent leaves of the cotyledonous stage. In all cultivars studied more than 5O% of the seedlings were damaged, however damage during the cotyledonous stage had the least effect on yield except when complete defoliation and death of seedling occurred.
Download or read book Effect of Variety Planting Date and Plant Population on Yield and Quality of Snap Bean Phaseolus Vulgaris L Seed written by Tarciso de Sousa Filgueiras and published by . This book was released on 1977 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of these experiments were to determine the feasibility of saving seed from snap bean fields in the Willamette Valley that have been bypassed for canning and freezing, and to study the effects of different seed production methods on yield and quality of snap bean (Phaseolus vulgaris L.). Field experiments were conducted over a period of two years at the Oregon State University Vegetable Research Farm at Corvallis. The cultivars OSU 1604 and Asgrow 290 were used in these trials. Planting dates in 1975 were May 17, June 20, and July 3, and in 1976 were April 29, May 13, June 4, and June 22. Seeding rates of 165,000, 330,000 and 495,000 seeds/ha were used in both years. The quality of the harvested seed was assessed in terms of germination, seed size, protein content, seedling root length, seedling dry weight, halo blight infection, and field performance. The data indicate that technically it is feasible to produce snap bean seed in the Willamette Valley with yield and quality equal to those produced in traditional seed production areas. It is also suggested that high quality bean seed can be harvested from fields that have been bypassed for processing, provided they have been planted. The seed production methods tested affected nearly all aspects of the crop. Early plantings provided greater yields and delayed plantings decreased yields up to 62%. When planting was delayed until July 3, no seed was harvested because the crop did not mature before the fall rains. The three seeding rates tested did not affect total seed yield appreciably. Laboratory evaluations in 1975 showed no appreciable effects of planting date and seeding rate on seed quality. Field evaluation, however, showed that for Asgrow 290, seeds from the second planting had better stands and produced 20% more pods than seeds from the first planting. Likewise, seeds grown at low density produced 10% and 23% more pods than seeds grown at medium and high densities, respectively. OSU 1604 was not affected by cultural practices. In 1976, yield and seed quality of both cultivars were affected by planting date and seeding rate in the following ways: early plantings and low seeding rates produced greater yields, larger and heavier seeds and heavier seedlings. Late plantings and high seeding rates depressed yields, seed size and seedling weight. Protein content of seed was not affected by either of these variables.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1996 with total page 2376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1993 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Common Bean Genome written by Marcelino Pérez de la Vega and published by Springer. This book was released on 2017-12-20 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides insights into the genetics and the latest advances in genomics research on the common bean, offering a timely overview of topics that are pertinent for future developments in legume genomics. The common bean (Phaseolus vulgaris L.) is the most important grain legume crop for food consumption worldwide, as well as a model for legume research, and the availability of the genome sequence has completely changed the paradigm of the ongoing research on the species. Key topics covered include the numerous genetic and genomic resources, available tools, the identified genes and quantitative trait locus (QTL) identified, and there is a particular emphasis on domestication. It is a valuable resource for students and researchers interested in the genetics and genomics of the common bean and legumes in general.
