scholarly journals Analysis of the Effectiveness of Existing Niger Seed Market Channels in Selected Primary Agricultural Multipurpose Cooperatives in Horo Guduru Wollega Zone, Oromia (page 43—60)

2021 ◽  
Keyword(s):  
Seed Market ◽  
Niger Seed

scholarly journals Monitoring Current-Season Spread of Potato virus Y in Potato Fields Using ELISA and Real-Time RT-PCR

Plant Disease ◽  
2013 ◽  
Vol 97 (5) ◽  
pp. 641-644 ◽  
Author(s):  
Manphool S. Fageria ◽  
Mathuresh Singh ◽  
Upeksha Nanayakkara ◽  
Yvan Pelletier ◽  
Xianzhou Nie ◽  
...  
Keyword(s):  
Real Time ◽  
Potato Virus ◽  
Potato Virus Y ◽  
Enzyme Linked Immunosorbent Assay ◽  
Rt Pcr ◽  
Pcr Assay ◽  
Current Season ◽  
Seed Market ◽  
Polymerase Chain ◽  
Time Of Harvest

The current-season spread of Potato virus Y (PVY) was investigated in New Brunswick, Canada, in 11 potato fields planted with six different cultivars in 2009 and 2010. In all, 100 plants selected from each field were monitored for current-season PVY infections using enzyme-linked immunosorbent assay (ELISA) and real-time reverse-transcription polymerase chain reaction (RT-PCR) assay. Average PVY incidence in fields increased from 0.6% in 2009 and 2% in 2010 in the leaves to 20.3% in 2009 and 21.9% in 2010 in the tubers at the time of harvest. In individual fields, PVY incidence in tubers reached as high as 37% in 2009 and 39% in 2010 at the time of harvest. Real-time RT-PCR assay detected more samples with PVY from leaves than did ELISA. A higher number of positive samples was also detected with real-time RT-PCR from growing tubers compared with the leaves collected from the same plant at the same sampling time. PVY incidence determined from the growing tubers showed a significant positive correlation with the PVY incidence of tubers after harvest. Preharvest testing provides another option to growers to either top-kill the crop immediately to secure the seed market when the PVY incidence is low or leave the tubers to develop further for table or processing purposes when incidence of PVY is high.

Innovation in the Seed Market: The Role of IPRs and Commercialization Rules

2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Marc Baudry ◽  
Adrien Hervouet
Keyword(s):  
Product Differentiation ◽  
Economic Consequences ◽  
Vertical Product Differentiation ◽  
Legal Rules ◽  
Sequential Innovation ◽  
Seed Market ◽  
Second Category ◽  
The Impact ◽  
Compulsory Registration

AbstractThis article deals with the impact of legal rules on incentives in the seeds sector to create new plant varieties. The first category of rules consists in intellectual property rights and is intended to address a problem of sequential innovation and R&D effort. The second category concerns commercial rules that are intended to correct a problem of adverse selection. We propose a dynamic model of market equilibrium with vertical product differentiation that enables us to take into account the economic consequences of imposing either Plant Breeders’ Rights (PBRs) or patents as IPRs and either compulsory registration in a catalog or minimum standards as commercialization rules. The main result is that the combination of catalog registration and PBRs adopted in Europe is hardly supported by the model calibrated on data for wheat in France.

Estimating the Wheat Seed Market in Afghanistan

2007 ◽  
Vol 8 (2) ◽  
pp. 45-56 ◽  
Author(s):  
Sam Kugbei
Keyword(s):  
Wheat Seed ◽  
Seed Market

Optimal Market-Integration Decisions by Policymakers: Modeling and Analysis of Agriculture Market Data

2021 ◽  
Author(s):  
Shivam Gupta ◽  
Saurabh Bansal
Keyword(s):  
Operations Management ◽  
Market Integration ◽  
Relative Size ◽  
Relative Price ◽  
The European Union ◽  
Demand Model ◽  
Modeling And Analysis ◽  
Complete Integration ◽  
Seed Market ◽  
Social Surplus

Policymakers often seek to integrate markets as a way to maximize social welfare. In this article, the authors consider the spectrum of all possible integration policies, from full isolation to complete integration, and characterize the socially optimal market integration, under general demands. They identify market conditions under which social surplus is indeed maximized at partial market integration. For the linear price-responsive demand model that is used extensively in the operations management literature, these conditions are identified as thresholds on (i) the relative size of the markets being integrated, and (ii) the relative price sensitivity of consumers in these markets. The authors then apply the model to the commercial seed market in the European Union (EU). Their analysis shows that socially optimal market integration for these countries provides a further improvement in the social surplus for the EU by 2.80%, relative to complete integration. Results show that policymakers should exercise caution in determining the extent to which markets are integrated.

scholarly journals Use of molecular marker techniques in seed testing by Brazilian seed companies

1998 ◽  
Vol 55 (spe) ◽  
pp. 79-82 ◽  
Author(s):  
P.T. Della Vecchia ◽  
C.A.R. da Silva ◽  
P. Terenciano-Sobrinho
Keyword(s):  
Molecular Marker ◽  
New Technologies ◽  
Seed Quality ◽  
Genetic Purity ◽  
Process Step ◽  
Seed Testing ◽  
Routine Basis ◽  
Seed Market ◽  
Key Issues ◽  
High Quality Seed

Seed market is becoming global and globalization is growing very fast. To compete favourably in this new global seed world, quality and cost are and will be certanly the key issues. High seed quality can only be obtained by a thorough control of the entire seed production process, step by step from planning to final delivery. That requires science, technology, expertise, experience, good management and certanly, the most important, an absolute and unconditional commitment with quality. Seed testing for quality assurance is one important step in the process of production of high quality seed. In the late years a considerable amount of research has been published, particularly on the use of some Polymerase Chain Reaction DNA based new technologies (RAPD, microsatelites, AFLP) for genetic purity determinations in seed testing. As far as we know, no Brazilian seed company is using, on regular basis, RAPD or other molecular marker techniques in the determination of genetic purity in seed testing. Most of these are using morphological or physiological traits expressed by seed, seedling or mature plant and/or electrophoresis of seed or seedling proteins/isoenzymes for that purpose. Main reasons for that are: DNA molecular marker techniques are relatively new; lack of specialized personnel to run DNA molecular marker assays on routine basis; higher cost/sample when compared to proteins/isoenzymes electrophoresis.

The impact of seed market access and transaction costs on potato biodiversity and yields in Bolivia

2012 ◽  
Vol 17 (5) ◽  
pp. 633-661 ◽  
Author(s):  
Lina Salazar ◽  
Paul Winters
Keyword(s):  
Transaction Costs ◽  
Market Access ◽  
Market Participation ◽  
Market Choice ◽  
Crucial Effect ◽  
Negative Effect ◽  
Seed Market ◽  
Using Data ◽  
The Impact

AbstractUsing data from Bolivia, this paper analyzes seed market participation and how transaction costs in these markets influence intracrop biodiversity and the influence of biodiversity on yields. Results indicate that seed market attributes such as distance and market-level biodiversity have a crucial effect on a farmer's market choice, suggesting that farmers are willing to sacrifice time and income to travel further distances in order to reach markets with a broader range of varieties. This study finds that farmers from this sample who have access to seed markets are more likely to have higher levels of intracrop biodiversity. In addition, for market-integrated farmers, intracrop biodiversity does not seem to have a negative effect on yields, which suggests that improved market access does not threaten biodiversity in contexts with similar characteristics to the study site.

scholarly journals Agronomic Performance of a Spanish and Runner Cultivar Harvested at Six Different Digging Intervals1

1985 ◽  
Vol 12 (1) ◽  
pp. 50-54 ◽  
Author(s):  
A. C. Mixon ◽  
W. D. Branch
Keyword(s):  
Arachis Hypogaea ◽  
Coastal Plain ◽  
Market Value ◽  
Growth Period ◽  
Agronomic Performance ◽  
Experiment Station ◽  
Arachis Hypogaea L ◽  
Seed Market ◽  
Short Season

Abstract In a three year study (1980–1982) at the Georgia Coastal Plain Experiment Station, Tifton, Georgia, the full-season Florunner and the short-season Pronto cultivars were harvested at six 10-day intervals beginning 90 days after planting. For the 3-year average, peanut (Arachis hypogaea L.) plants from Florunner harvested at 110 and each succeeding 10-day growth period up to 140 days produced greater pod yields, sound-mature kernels, large and jumbo seed, and greater calculated market value than Pronto. However, seed market grade components and maturity indexes reflecting quality and maturity were impaired when peanuts were dug too early and varied among years and growth periods.

scholarly journals Application of ITAP-PCR Techniques to Assess the Genetic Variability of Selected Cultivars of Winter Triticale (× Triticosecale Wittmack)

2019 ◽  
Vol 47 (3) ◽  
pp. 947-953
Author(s):  
Izabela SZUĆKO ◽  
Anna MĄDRACH
Keyword(s):  
Genetic Variability ◽  
Genetic Similarity ◽  
Group Method ◽  
Fast Method ◽  
Winter Triticale ◽  
Pair Group ◽  
Cereal Plant ◽  
Seed Market ◽  
Polymorphism Rate ◽  
Triticosecale Wittmack

The increasing use of triticale (× Triticosecale Wittmack) indicates that its position on the seed market is constantly strengthening; therefore, the research on its genetic variability is necessary to improve breeding process of new cultivars. The aim of the study was to assess the possibility of using the ITAP-PCR technique to analyse the genetic similarity of nine cultivars of winter triticale cultivated in Poland. Primers designed on the basis of 6 DNA transposon sequences commonly found in cereal plant genomes were used for the study. The average polymorphism rate in the genotypes used in the study was determined as 95.24%; in total, 75 bands were obtained, of which 73 were polymorphic. The PIC value ranged between 0.27 and 0.44, and was highest for the Hamlet primer. The lowest PIC value was observed for the Mutator primer. The average DI value was 0.34, MI - 4.08, AEI - 12.17 and IPI - 4.40. SI ranged from 36.7% to 1.7%. A dendrogram was created according to the unweighted pair group method with arithmetic mean (UPGMA), which in terms of genetic similarity divided the analysed winter triticale cultivars into two main similarity groups.We confirmed that ITAP technique of transposon-based marker is efficient and fast method to detect genetic variability between different winter triticale cultivars. In addition, the presence of analyzed transposon families in hexaploid triticale has not been studied earlier.

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