Download or read book Inheritance of Resistance to Septoria Leaf Blotch in Selected Spring Bread Wheat Genotypes Triticum Aestivum L written by Guillermo Ariel Briceno Felix and published by . This book was released on 1992 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Septoria leaf blotch of wheat is a major biotic factor limiting the grain yield. To determine the nature of inheritance involving selected genotypes, three resistant semidwarf spring wheat lines exhibiting durable global resistance and one susceptible cultivar were crossed in all possible combinations, excluding reciprocals. Parents, Fl, F2, and F3 generations were inoculated with one pathogenic strain of Septoria tritici and evaluated under field conditions. Data were collected on an individual plant basis. F2 and F3 frequency distributions were computed to determine the nature of inheritance. Combining ability analysis of the 4x4 diallel cross and narrow-sense heritability were employed to estimate the nature of gene action. Phenotypic correlations were obtained to examined the possible association between disease severity traits and their relationship with heading date and plant height. The continuous distribution of the F2 and F3 populations among crosses made it impossible to classify plants into discrete classes in crosses between resistant x susceptible genotypes. Mean values of the disease traits Septoria progress coefficient, Relative coefficient of infection, and Septoria severity of flag leaf among the segregating populations were similar to the midparent values. Transgressive segregation was also observed in the F2 and F3 suggesting that parents had different resistance genes. Additive gene effects were found to be the major component of variation although nonadditive gene action played an important role in the expression of all three disease traits. The resistant parents Bobwhite"S" and Kavkaz /K4500 L.A.4 were found to have the largest negative general combining ability effects for the disease traits suggesting that these parents would be the best source for resistance to Septoria leaf blotch. High general combining ability and high narrow sense heritability estimates in the F3 population, indicated that substantial progress for resistance to Septoria tritici would be effective selecting in this generation. Of the three disease measures it would appear that selection for the lowest percentage of Septoria infection on the flag leaf would provide the most progress in developing resistant cultivars. Moderate and low negative phenotypic correlations were found among generations for the disease traits with heading date and plant height. From the results of this study the selection of early maturing short stature progeny would be possible within the genetic materials employed in this study.
Download or read book Plant Breeding written by H.K. Jain and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 813 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Indian Society of Genetics and Plant Breeding was established in 1941 in recognition of the growing contribution of improved crop varieties to the country's agriculture. Scientific plant breeding had started inIndia soon after the rediscovery of Mendel's laws of heredity. The Indian Agricultural Research Institute set up in 1905 and a number of Agricultural Colleges in different parts of the country carried out some of the earliest work mostly inthe form of pure-line selections. In subsequent years, hybridization programmes in crops like wheat, rice, oilseeds, grain legumes, sugarcane and cotton yielded a large number of improved cultivars with significantly higher yields. A turning point came in the 1960s with the development of hybrids in several crops including inter-specific hybrids in cotton. And when new germplasm with dwarfing genes became available in wheat and rice from CIMMYT and IRRI, respectively,Indian plant breeders quickly incorporated these genes into the genetic background of the country's widely grown varieties with excellent grain quality and other desirable traits. This was to mark the beginning of modem agriculture in India as more and more varieties were developed, characterized by a high harvest index and response to modem farm inputs like the inorganic fertilizers . India's green revolution which has led to major surpluses offood grains and othercommodities like sugar and cotton has been made possible by the work of one of the largest groups of plant breeders working in a coordinated network.
Download or read book A checklist of academic theses produced with support from CIMMYT 1966 2000 written by John E. Woolston and published by CIMMYT. This book was released on 2000 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inheritance of Resistance to Septoria Tritici Blotch in Wheat written by Oscar Arturo Somasco and published by . This book was released on 1990 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bread Wheat written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2002 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat is the most widely grown cereal crop in the world, with an ever increasing demand. It plays a fundamental role in food security, and a major challenge is to meet the additional requirements with new cultivars and improved cropping technologies. This book covers information from a number of international experts on the current status of research on wheat improvement and production (wheat breeding programs and genetics), as well as on other aspects (including wheat diseases), from its evolutionary origins to seed production technologies. [from the FAO website]
Download or read book Inheritance of Resistance to Septoria Leaf Blotch in Triticum Aestivum Cv Carifen 12 written by Tae Soo Lee and published by . This book was released on 1979 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetics and Genomics to Enhance Crop Production Towards Food Security written by Ajay Kumar and published by Frontiers Media SA. This book was released on 2022-01-17 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy News written by and published by . This book was released on 1995 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Download or read book A Checklist of Academic Theses Produced with Support from CIMMYT 1966 1996 written by John E. Woolston and published by . This book was released on 1996* with total page 88 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 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1990 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Barley and Wheat Reference Sequences Downstream Applications in Breeding Gene Isolation GWAS and Evolution Volume II written by Dragan Perovic and published by Frontiers Media SA. This book was released on 2022-11-30 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biotechnology and Plant Disease Management written by Zamir K. Punja and published by CABI. This book was released on 2007-01-01 with total page 589 pages. Available in PDF, EPUB and Kindle. Book excerpt: Punja (biological sciences, Simon Fraser University, Canada) collects studies on key approaches to managing each group of plant pathogens within the context of recent developments in the field. Broad themes include microbe-plant interactions, molecular diagnostics of plant pathogens, and enhancement of plant resistance. Chapters are in sections on investigating microbe-plant interactions for applications to disease management, molecular diagnostics of plant pathogens, enhancing resistance of plants to pathogens, and understanding microbial interactions. Some specific topics include molecular diagnostics of soilborne fungal pathogens, application of cationic antimicrobial peptides for management of plant diseases, and potential disease control strategies revealed by genome sequencing and functional genetics of plant pathogenic bacteria. B&w images and a few color illustrations are included. The readership for the book includes academics and government organizations involved in the agriculture and biotechnology sectors.
Download or read book Breeding Major Food Staples written by Manjit Kang and published by John Wiley & Sons. This book was released on 2008-02-04 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the world’s population increases the need to produce greater quantities of major staple crops such as wheat, rice, maize, potato, cassava, soybean, sweet potato, barley, and banana in order to sufficiently feed the people of the world continues to grow. Breeding Major Food Staples covers improving yields and quality of these crops through breeding and the use of molecular biology tools such as gene transfer, genome mapping, biofortification, and bioinformatics. This book will be an important reference for anyone working in crop breeding.
Download or read book Inheritance of Septoria Leaf Blotch Resistance and the Possible Influence of Heading Date and Plant Height on the Disease Expression in a Winter Wheat Cross written by Miguel Alfonso Camacho Casas and published by . This book was released on 1989 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parental lines, Fi's and segregating populations (F2, F3 and BC's) including reciprocals were evaluated under field conditions to determine if genetic resistance per se exists for Septoria Leaf Blotch in a selected winter wheat cross. The experiment was conducted over a three year period with both natural infection and artificial inoculations being employed. Data were collected on an individual plant basis. The mode of inheritance was determined using the generation mean analysis. Phenotypic correlations and path coefficient analyses were employed to determine if possible associations of plant height and heading date were influencing disease severity. Differences for all variables were observed for the parents and all generations each year. Based on the frequency distribution of the F2 population, all variables measured appeared to be quantitatively inherited. Information from the generation mean analyses showed that both additive and nonadditive genetic effects were involved in the expression of disease resistance. Dominance and epistasis effects were more important in influencing disease resistance. That genetic resistance per se was involved was evidenced by the consistent difference observed within and between generations. As observed from the phenotypic correlations and path coefficient analysis, a significant amount of variation in disease expression could not be accounted for by variation in plant height and heading date. In addition, F3 lines with similar maturity and plant height differed in their level of disease resistance. It does appear however, that a compromise will be necessary in both plant height and heading date if acceptable levels of resistance are to be achieved, as no progeny was found to be as early and short as the susceptible parent with acceptable levels of disease resistance.
Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1999 with total page 1664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inheritance of Resistance to Septoria Tritici Blotch in the Winter Wheat Doubled Haploid Population Solit r X Mazurka written by Christiane Kosellek and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a doubled haploid population of the two winter wheat cultivars Solitär (resistant) and Mazurka (susceptible) inheritance of Septoria tritici blotch (STB) resistance was analyzed. In the seedling stage isolate-specific quantitative trait loci (QTL) were mapped on chromosomes 3A, 1B, 4A, 3B, 3D und 6B. QTL specific for necrotization of leaf area and pycnidia production were localized on chromosomes 1A, 4B and 3B, 6B, respectively. Under natural infection in the field plant height correlated negative with disease severity. With plant height as co-variable five QTL specific for resistance were identified on chromosomes 5A, 6D and 7D. Although, the contributions of QTL x QTL interactions to the total variance were generally low a complex inheritance of STB resistance can be assumed. None of the isolate-specific QTL detected in the seedling stage were verified in the field trials under natural infection.
