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Book Screening of Soybean Glycine Max L Merrill Genotypes for Resistance to Rust Yellow Mosaic and Pod Shattering

Download or read book Screening of Soybean Glycine Max L Merrill Genotypes for Resistance to Rust Yellow Mosaic and Pod Shattering written by M. H. Khan and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Screening of Soybean (Glycine Max (L.) Merrill) Genotypes for Resistance to Rust, Yellow Mosaic and Pod Shattering.

Book Stability Analysis in Some Soybean Glycine Max L Merrill Genotypes

Download or read book Stability Analysis in Some Soybean Glycine Max L Merrill Genotypes written by Onkar Singh and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Evaluation of Soybean Glycine Max L Merr Root Development in Greenhouse Solution Culture and the Relationship to Drought Tolerance in the Field

Download or read book Evaluation of Soybean Glycine Max L Merr Root Development in Greenhouse Solution Culture and the Relationship to Drought Tolerance in the Field written by Lynn Liane Scherbert and published by . This book was released on 1985 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Resistance of Soybean Glycine Max L Merr to Fusarium Solani F Sp Glycines Causal Agent of Sudden Death Syndrome

Download or read book Resistance of Soybean Glycine Max L Merr to Fusarium Solani F Sp Glycines Causal Agent of Sudden Death Syndrome written by Austeclinio Lopes de Farias Neto and published by . This book was released on 2005 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Sudden death syndrome (SDS) caused by the soilborne fungus Fusarium solani f. sp. glycine (FSG) is a major disease in soybean [Glycine max (L.) Merr.]. Slecetion for SDS resistance in the field is difficult because of the impact of the environment on disease development. The objective of my first study was to evaluate the effect of field inoculation methods, soil compaction, and irrigation timing on the occurrence of SDS symptons. Six treatments which included FSG infested grain of white sorghum [Sorghum bicolor (L.) Moench], popcorn (Zea mays everta) or oat (Avena sativa L.) were planted in the furrow with the soybean seed, broadcasted and incorporated into the soil prior to planting or placed below the soybean seed just prior to planting. Three experiments were also conducted to evaluate the effect of compaction and irrigation on SDS symptom occurrence. Irrigation treatments that included water application at V3, V7, R3, R4 and/or R5 growth stages were applied. In all experiments disease incidence (DI) and disease severity (DS) ratings were taken to evaluate foliar SDS symptom and a disease index (DX) was determined. The inoculation methods that produced the most severe foliar symptom included placing infested sorghum below the seed prior to planting (DX=36.1) and planting infested popcorn in the furrow with the soybean seed (DX=28.7). No significant effects of soil compaction on SDS foliar symptom development were observed. The irrigation treatments during mid to late reproductive growth stages resulted in the greatest increases in SDSfoliar symptom development. Evaluation of a great number of lines for SDS resistance in the field is time consuming and expensive. The objective of the second study was to evaluate two SDS greenhouse screening methods and determine which best correlates with field resistance of soybean genotypes. Three sets of genotypes were previously evaluated for field reaction to SDS. All three sets were evaluated with the greenhouse cone method and two sets were evaluated with the greenhouse tray method ...

Book Evaluation of Disease Resistance of Transgenic and Conventional Soybean Glycine Max L Merrill Varieties and Determination of Associated Pod and Seed Mycoflora in Mississippi

Download or read book Evaluation of Disease Resistance of Transgenic and Conventional Soybean Glycine Max L Merrill Varieties and Determination of Associated Pod and Seed Mycoflora in Mississippi written by Dorgelis Antonio Villarroel and published by . This book was released on 2001 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Selecting Soybean Glycine Max L Merrill Genotypes for Resistance to the Root knot Nematode Meloidogyne Javanica

Download or read book Selecting Soybean Glycine Max L Merrill Genotypes for Resistance to the Root knot Nematode Meloidogyne Javanica written by Amelio Dall'Agnol and published by . This book was released on 1978 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Inheritance Studies of Two Characteristics in Soybeans Glycine Max L Merrill

Download or read book Inheritance Studies of Two Characteristics in Soybeans Glycine Max L Merrill written by Romeu Afonso de Souza Kiihl and published by . This book was released on 1976 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 Soybean mosaic virus. Inheritance of resistance to soybean mosaic virus (strain SMV-1) was studied using eight resistant and three susceptible genotypes. One hundred twenty-seven F1 plants, 174 BCF1 plants, and 20 F2 populations of crosses between resistant and susceptible and between resistant types were mechanically inoculated in the field with an air brush. Seven F2 populations had plants progeny tested. Two resistant types D73-7725 (carries the allele from PI 96983), and Ogden; two susceptible types (Lee and Hill), and F1's Lee X Ogden, Lee X D73-7725, and Hill X Ogden were graft-inoculated with SMV-1. There F2 populations: Hill X PI 96983, Hill X Ogden, and PI 96983 X Ogden were inoculated in the greenhouse with SMV-1-B which is a mutant strain isolated from and F1 plant of Lee X (Lee X Ogden). It was found that there exists a multiple allelic series Rsv, rsv1, and rsv. Rsv is carried by PI 96983, and is dominant to rsv1 and rsv. It gives resistance to SMV-1 and SMV-1-B. Ogden (and probably D71-9966 and D72-7842) carries rsv1, which is dominant to rsv and gives resistance to SMV-1 but shows necrosis with SMV-1-B by mechanical inoculation. Susceptible types carry rsv. II Late flowering under short-day conditions. Two genotypes were used in this study: D72-7842, which flowered in 63 and 31 days when emergence occurred on May 25, (long photoperiod - 15 h 15 min) and on September 1 (short photoperiod 13 h 30 min), respectively, at Stoneville, Mississippi, (33o 30 min LN) and Santa Maria which flowered in 75 ...

Book Use of Molecular Markers Agronomical and Related Attributes on Diversity Analysis of Soybean Glycine Max Genotypes

Download or read book Use of Molecular Markers Agronomical and Related Attributes on Diversity Analysis of Soybean Glycine Max Genotypes written by Keitumetse Kujane and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean (Glycine max (L.) Merrill) is one of the most important leguminous crops grown globally for food, oil and animal feed. It is undoubtedly of a great economic and social importance worldwide. Soybean provides about 64 percent of the world’s oilseed meal supply and is the major source of oil, accounting for about 28 percent of total production. Studies have revealed that South Africa is the leading producer of soybean in Africa and very few small-holder farmers practice soybean production. The characterisation of diverse soybean genotypes using agronomic, molecular markers and nutritional quality traits have not been fully utilised in order to achieve breeding, conservation and management goals. The objectives of the study were to: (i) determine the presence of genetic diversity among the soybean genotypes using agro-morphological traits; (ii) assess the level of genetic diversity present among the soybean genotypes using nutritional quality traits; and (iii) to determine the presence of genetic diversity among the soybean genotype making use of simple sequence repeat (SSR) markers. Thirty soybean genotypes were randomly selected from the Agricultural Research Council-Grain Crop (ARC) gene bank and were grown in a growth chamber until they reached the 4th leaf stage. The leaves were then collected and freeze-dried, then subjected to genotyping using 20 polymorphic SSR markers. The SSR analysis revealed extensive variation among the soybean genotypes. The genotypes Santa Rosa and PR 165-52 had the closest distance (similarity), whereas B 66 S 31, 69 S 7 and R-5-4-2 M showed the highest dissimilarity index. The number and size of alleles rangedfrom 4 to 22bp and 2 to 33bp, respectively. The polymorphic information content (PIC) variedbetween 0.46 and 0.85; while the heterozygosity data points ranged between 0.50 and 0.87.The second trial was carried out with 30 single lines of soybean of 3m each in row lengthwere planted in a non-controlled environment and replicated 3 times using a completerandomized block design. The soybean genotypes were subjected to characterization usingagro-morphological traits. Principal component analysis revealed that the three mostimportant components contributed 21.3%, 14.9% and 9.1% to the total variation in the fieldtrial where 30 lines of soybean were evaluated for agro-morphological traits and nutritional quality. The traits that contributed most to the variation were pod weight before threshing, number of branches per plant, pod number per plant, and yield per plant. These were further analysed for nutritional quality using near-infrared spectroscopy (NIR). The genotypes that had a higher protein and oil contents were Columbia M8A (37.54%) and B 66 S 256 (17.83%). Overall, the study found considerable levels of genetic variability among the soybean germplasm found at the Agricultural Research Council-Grain Crop gene bank using agro-morphological, SSR markers and nutritional quality traits. The selected lines should be useful for future breeding programmes while the knowledge of the genetic diversity can be used to direct efforts to conserve the diversity of soybean germplasm present locally and globally.

Book Genetic Study of Pod Shattering Resistance in Soybean Glycine Max L Merrill Plant Populations Derived from Exotic X Local Germplasm

Download or read book Genetic Study of Pod Shattering Resistance in Soybean Glycine Max L Merrill Plant Populations Derived from Exotic X Local Germplasm written by Khuliso Marline Nevhudzholi and published by . This book was released on 2016 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Studies on Leaf Spot and Blight of Soybean Glycine Max L Merrill Caused by Alternaria Tenuissima Kunze Ex Pers Wilt and Its Chemical Management

Download or read book Studies on Leaf Spot and Blight of Soybean Glycine Max L Merrill Caused by Alternaria Tenuissima Kunze Ex Pers Wilt and Its Chemical Management written by BHASKAR NAIK and published by . This book was released on 1996 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Climate Change Modelling Planning and Policy for Agriculture

Download or read book Climate Change Modelling Planning and Policy for Agriculture written by Anil Kumar Singh and published by Springer. This book was released on 2015-03-16 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well known that the impacts of climate change are tangible and hence there can be no debate about the need for appropriate adaptation measures, on a priority basis. However, it is equally important to recognize the fact that adaptation measures actually represent a dynamic synthesis of interventions pertaining to multiple systems. These are particularly of water, soil characteristics, genotypic and phenotypic variations and their expressions, age-correlated biochemical changes aligned with planting schedules and favorable weather/climate conditions. Nutrients, occurrence and distribution of associated vegetation including crop mixes also influence productivity. The overarching aspect of farming practice wields significant influence on the outcome and hence it is important to be clear about the particular focus of the investigations being carried out and reported in a suitable manner. It is essential to recognize that scientific research in agriculture in India has always produced valuable results of direct relevance to her people. Importantly, preparedness to tackle disasters due to inclement weather system has prominently featured on the agenda. The recent focus on climate change and impacts has provided the necessary impetus to reorganize the framework of investigation to capture the specifics of such impacts. In this context, the importance of micro climate variations too viz-a-viz the larger scales of impacts cannot be overemphasized. It will be useful to also help characterize natural variations versus artificially induced variations, helping us understand the complexities of individual and synergistic impacts too. Obviously, the limits and limitations of models could determine the spread and depth of the outcomes of investigations. Empirical evidences to reinforce assumptions have to also be documented with utmost care; guided by an understanding of the limits of tolerance, limiting factors, and the precautionary principle especially in the public policy interface. The present volume therefore, showcases these strands with the fond hope that they will stimulate further thinking and enable appropriate action.