scholarly journals Planting Materials Seed Systems of Finger Millet, Rice and Taro in Jumla, Kaski and Bara Districts of Nepal

1970 ◽  
Vol 6 ◽  
pp. 10-22 ◽  
Author(s):  
Bimal K Baniya ◽  
Radha K Tiwari ◽  
Pashupati Chaudhary ◽  
Surendra K Shrestha ◽  
Pushpa R Tiwari
Keyword(s):  
Seed Production ◽  
Finger Millet ◽  
Rice Seed ◽  
Seed Selection ◽  
Seed Supply ◽  
Millet Seed ◽  
Seed System ◽  
Rice Seeds ◽  
Planting Materials ◽  
Informal Seed Supply

Formal and informal seed supply systems of rice (Jumla, Bara and Kaski), finger millet and taro(Kaski) were studied in three ecosites of Nepal during 1999-2001 to understand the processes ofseed flow, seed production, seed selection and storage systems. A survey was conducted at 48 to96 households. Informal seed supply was the only system in Jumla and Kaski and formal systemexisted only in Bara. The main sources of seed were farmer's own saved seed (67-91%), seedfrom neighbors and relatives. Exchange of germplasm was the main basis of fulfillment fromother sources. All farmers obtained seed from their own village, while farmers introducedmaterials occasionally from outside village. Most of the farmers followed seed selection beforeor after crop harvest. Rice field selection and plant selection based on a fixed set of criteria wasthe common practice. Non lodged plants with more grain per panicle, bold grains, well-maturedand uniform plants, long panicle, true to type, good looking grains, free from diseases andinsects were the main rice seed selection criteria. All farmers from both sites stored rice seeds bylocal methods in the locally available containers. Mor and Mudkothi are the special strawcontainers to store rice seed in Bara. Dhara is a special mud structure used to store rice seeds inJumla. Finger millet seed supply system was mostly similar to that of rice seed system. Ninetyone percent farmers saved seed for their own use; however, many of them changed finger milletseeds lots or varieties regularly for their particular plot. Ears selection during harvest by setcriteria for seed purpose was the common practice. Farmers stored finger millet seed carefully insmall locally available containers and tried their best to maintain the quality of seed duringdifferent stage of seed production. Taro has diverse planting materials: cormels, corms witheyes, suckers and corm with small cormels. Taro planting materials management is totallyinformal and almost 89% farmers saved these materials for their use and replaced them mostlyafter 3 years. Farmers had fixed criteria of corms and cormels selection for planting purpose andfocus and more on disease free. Storage of planting materials was locally by using localmaterials and methods. Understanding of seed system in various crops helps to developconservation strategy.Key words: Seed flow; seed production; seed selection; seed storage; seed systemDOI: 10.3126/narj.v6i0.3343Nepal Agriculture Research Journal Vol.6 2005 pp.39-48

scholarly journals Rice Seed Production Under Conditions of Salinity Stres

2018 ◽  
Vol 48 (9) ◽  
Author(s):  
Fabio Schaun Harter ◽  
Leticia dos Santos Holbig Harter ◽  
Geri Eduardo Meneghello
Keyword(s):  
Seed Production ◽  
Salinity Stress ◽  
Irrigation Water ◽  
Saline Stress ◽  
Rice Seed ◽  
Rice Cultivars ◽  
Physiological Quality ◽  
Crop Cycle ◽  
Rice Seeds

ABSTRACT: In the present study, the objective was to evaluate the production and quality of rice seeds of four cultivars under conditions of saline stress caused by irrigation water. The work was carried out at the EliseuMaciel Agronomy College of the Universidade Federal de Pelotas, with four rice cultivars, IRGA 417, Avaxi CL, Inov CL and IAS 12-9 (Formosa). In the experiment, the following saline concentrations were used: 0; 12.5; 25; 37.5; 50; 75 and 100mM. After completing the crop cycle, the following agronomic characteristics were evaluated in each of the plants: number of panicles, total weight of panicles, percentage of full seeds, percentage of seedlings and weight of a thousand seeds. The physiological quality of the seeds harvested from the plants maintained under conditions of salinity stress was evaluated by germination and first count tests. Saline stress reduced the productivity and physiological quality of rice seeds, with different responses from the four cultivars used.

scholarly journals Paradox of Rice Seed System in India

2020 ◽  
Vol 3 (1) ◽  
pp. 29-35
Author(s):  
S.K. Mosharaf Hossain ◽  
Swati Nayak
Keyword(s):  
Seed Production ◽  
Secondary Data ◽  
Rice Seed ◽  
Replacement Rate ◽  
Yield Increase ◽  
Agrarian Economy ◽  
Development Agenda ◽  
Seed Security ◽  
Seed System ◽  
Staple Crop

Importance of rice in agrarian economy of India is enormous. In order to meet demand of this staple crop for increasing population, productivity enhancement is a key research and development agenda. Improving seed replacement rate is widely held as a critical area to boost rice productivity in the country. This study based on secondary data revealed merely sowing quality seeds may not result in desired level of yield increase unless quality seeds of a good and appropriate variety is sown. Punjab, with its 38% SRR, registers 3.97 ton per ha yield whereas it is just 1.51 ton per ha in Chattisgarh where SRR is 44%. There are many varieties, quite older than stipulated 10 years, that are largely indented and grown due to lack of substitutes and poor varietal awareness. Because of this slow varietal awareness and replacement, rice yield still stagnates despite seeds are of assured quality. This shows varietal replacement rate is as important as seed replacement rate. The available studies also indicate that current seed system further needs to rationalize variety selection, production and multiplication of breeder seeds for ensuring seed security of farmers and this should be supplemented by measures taken to promote varietal promotion and replacement, quality seed production interventions at farmers’ level, and decentralized seed production system.

scholarly journals Kapasitas Petani Penangkar Benih Padi di Kabupaten Majalengka: Peran Penyuluhan dan Kelompok Tani

2021 ◽  
Vol 17 (2) ◽  
pp. 258-273
Author(s):  
Atang Muhammad Safei ◽  
Siti Amanah ◽  
Anna Fatchiya
Keyword(s):  
Seed Production ◽  
Partial Least Square ◽  
Least Square ◽  
Extension Agents ◽  
Rice Seed ◽  
Path Modeling ◽  
Farmer Groups ◽  
Rice Seeds ◽  
Use Of Social Media

The availability of certified rice seeds is still limited because the limited number of rice seed breeder farmers.The capacity of farmers in seed assessment and seed production determine the succes of the rice seed breeding. The research using the census method (112 breeder farmers) was conducted in Majalengka Regency. Interviews and observations were carried out to obtain data on extension and breeding of rice seeds by farmers. Partial Least Square (PLS-Path Modeling) was used to analyze the data. The results showed that the suitability of the materials, extension methods and ability of the extension agents were in the medium category, the intensity of extension was still low. Extension officers visit farmer groups once a month. The role of farmer groups and farmer capacity is in the medium category. Farmer groups are able to carry out the learning process and seed production even though the marketing is not continuous. The implementation of extension services and farmer groups has a positive effect on the farmer capacity. The use of social media by breeder farmers for seed marketing and obtaining marketing partners and business capital can be increased through increasing the intensity of extension by involving farmer groups.

scholarly journals LAMP-based foldable microdevice platform for the rapid detection of Magnaporthe oryzae and Sarocladium oryzae in rice seed

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
M. K. Prasannakumar ◽  
P. Buela Parivallal ◽  
Devanna Pramesh ◽  
H. B. Mahesh ◽  
Edwin Raj
Keyword(s):  
Magnaporthe Oryzae ◽  
Plant Pathogens ◽  
Point Of Care ◽  
Lamp Assay ◽  
Rice Seed ◽  
Highly Sensitive ◽  
Polymerase Chain ◽  
Rice Seeds ◽  
Template Dna ◽  
Assay Conditions

AbstractRice blast (caused by Magnaporthe oryzae) and sheath rot diseases (caused by Sarocladium oryzae) are the most predominant seed-borne pathogens of rice. The detection of both pathogens in rice seed is essential to avoid production losses. In the present study, a microdevice platform was designed, which works on the principles of loop-mediated isothermal amplification (LAMP) to detect M. oryzae and S. oryzae in rice seeds. Initially, a LAMP, polymerase chain reaction (PCR), quantitative PCR (qPCR), and helicase dependent amplification (HDA) assays were developed with primers, specifically targeting M. oryzae and S. oryzae genome. The LAMP assay was highly efficient and could detect the presence of M. oryzae and S. oryzae genome at a concentration down to 100 fg within 20 min at 60 °C. Further, the sensitivity of the LAMP, HDA, PCR, and qPCR assays were compared wherein; the LAMP assay was highly sensitive up to 100 fg of template DNA. Using the optimized LAMP assay conditions, a portable foldable microdevice platform was developed to detect M. oryzae and S. oryzae in rice seeds. The foldable microdevice assay was similar to that of conventional LAMP assay with respect to its sensitivity (up to 100 fg), rapidity (30 min), and specificity. This platform could serve as a prototype for developing on-field diagnostic kits to be used at the point of care centers for the rapid diagnosis of M. oryzae and S. oryzae in rice seeds. This is the first study to report a LAMP-based foldable microdevice platform to detect any plant pathogens.

scholarly journals Detection of QTLs for Outcrossing-Related Traits in CSSL Population Derived from Primitive Japonica Accession Ludao in the Genetic Background of O. sativa spp. Japonica Restorer C-bao Using RSTEP-LRT Method

Agronomy ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 28
Author(s):  
Lal Bux ◽  
Dalu Li ◽  
Muhammad Faheem ◽  
Nour Ali ◽  
Muzafar Hussain Sirohi ◽  
...  
Keyword(s):  
Seed Production ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Flag Leaf ◽  
Leaf Angle ◽  
Ratio Test ◽  
Phenotypic Variance ◽  
Rice Seed ◽  
Hybrid Seed Production ◽  
Cms Line

The outcrossing traits in rice (Oryza sativa L.) affect the yield of hybrid seed production. Using a cytoplasmic male sterile (CMS) line with good outcrossing traits, such as short flag leaf length (FLL), narrow flag leaf width (FLW), wide flag leaf angle (FLA), and elongated panicle neck length (PNL), for hybrid rice seed production, it is possible to avoid the procedure of cutting flag leaves and make the supplementary pollination feasible by machine. In this study, a japonica restorer C-bao as the receptor parent and a primitive japonica accession Ludao as the donor parent were used to construct a chromosome segment substitution line (CSSL) population. The CSSL population was used to detect quantitative trait loci (QTLs) for the four outcrossing traits using a likelihood ratio test based on the stepwise regression (RSTEP-LRT) method. The CSSL population constructed consisted of 163 lines covering 90.7% of the donor genome. Among the seven QTLs detected in the CSSL population, four QTLs were detected in both years. qFLL-4 explained 6.70% of the two-year-averaged phenotypic variance, and the alleles from Ludao decreased FLL 5.1 cm. qFLA-1.1 and qFLA-1.2 explained 7.85% and 21.29% of the 2-year-averaged phenotypic variance respectively, and the alleles from Ludao increased FLA 17.38° and 31.50°. qPNL-8 explained 8.87% of the 2-year-averaged phenotypic variance, and the alleles from Ludao increased PNL 4.44 cm. These favorable alleles identified could be used to improve the outcrossing traits of parents for hybrid rice seed production in rice.

scholarly journals Socio-economic Factors Influencing Profitability of Rice Seed Production in Selected Areas of Bangladesh

2014 ◽  
Vol 12 (1) ◽  
pp. 33-40
Author(s):  
MZ Hoque ◽  
ME Haque
Keyword(s):  
Seed Production ◽  
Crop Production ◽  
Information Sources ◽  
Economic Benefits ◽  
Influential Factor ◽  
Farm Size ◽  
Economic Factors ◽  
Rice Seed ◽  
The Government ◽  
Socio Economic Factors

Seed is the foundation of agriculture for enhancing crop production. The economic benefits from the improved quality seed production help scaling up the livelihood standard as well as nutritional status of the common people. The study was carried out in three districts namely Jamalpur, Gazipur and Manikganj to identify the socio-economic dimensions of the government seed production project beneficiaries persuading profitability of rice seed production. Data were collected through intensive survey of randomly selected 211 sample respondents using pre-tested interview schedule. To examine the profitability of rice seed production, the gross margin and cost benefit analysis were carried out. Co-efficient of correlation and multiple stepwise regressions were employed to find out the determinants of profitability in rice seed production. Rice seed production was not found to be so profitable as investment in rice seed cultivation can produce average BCR of only up to 1.44, where highest BCR was found in Jamalpur (1.58) compared to Manikganj (1.48) and Gazipur (1.26). The results revealed that socio-economic factors have a profound influence on profitability of rice seed production as these factors combined explained 54.9 percent variation. Farm size, contact with information sources, knowledge on quality rice production and age of the respondents were identified as significant contributors in profitability of rice seed production, whereas contact with information sources was the single most influential factor (24.6%). Therefore, steps may be taken so that the seed-growers could directly be linked with more information sources dealing with seed production and marketing through the government initiatives to boost up the production as well as to ensure appropriate price of the farmers’ home grown seed. DOI: http://dx.doi.org/10.3329/agric.v12i1.19578 The Agriculturists 2014; 12(1) 33-40

scholarly journals Peningkatan Produksi Padi Melalui Penguatan Kelembagaan Perbenihan Padi Di Nagari Lubuk Pandan, Kecamatan 2 X 11 Enam Lingkung

2018 ◽  
Vol 3 (1) ◽  
pp. 33
Author(s):  
Ivonne Ayesha
Keyword(s):  
Community Leaders ◽  
Rice Seed ◽  
Policy Recommendations ◽  
Assistance Program ◽  
Informal Institution ◽  
Institutional Strengthening ◽  
Low Education ◽  
Rice Seeds ◽  
The Government

This study aims to identify the institutions that play a role in the procurement of rice seeds, describe the role of each institution, and develop policy recommendations for institutional strengthening of rice seed. The research was conducted in Nagari Lubuk Pandan, District 2x11 Six Lingkung, Padang Pariaman District, West Sumatera Province. The respondents' farmers were deliberately determined by 35 people based on the guidance of Wali Nagari and community leaders. Data were analyzed descriptively and presented in table and diagram. The results showed that 1) Institutional of rice seed in Nagari Lubuk Pandan consist of formal and informal institution. The formal institutions are Gapoktan "Lubuk Pandan Sejahtera" and Saprodi Kiosk. Informal institutions are groups of other farmers who lend rice seeds. More than half of the farmers of the respondents obtained rice seed from other farmers, because it was more efficient, 2) Gapoktan "Lubuk Pandan Sejahtera", played a role in channeling seeds to its members if there is a seed assistance program from the government. Saprodi Kiosk provides high quality rice seeds at all times, but very few farmers can afford them, and 3) Farmers' structural weaknesses (low education and knowledge, narrow land, technological mastery and low group manageability), cause they are unable to integrate the provision of seed input with the farm, so that production tends to decrease. This condition needs to be improved through institutional strengthening and empowerment of farmers through concepts acceptable to farmers

scholarly journals Seed bio-priming with phosphate solubilizing bacteria strains to improve rice (Oryza sativa L. var. FARO 44) growth under ferruginous ultisol conditions

2021 ◽  
Author(s):  
Musa Ibrahim Saheed ◽  
Beckley Ibrahim Ikhajiagbe
Keyword(s):  
Bacillus Cereus ◽  
Proteus Mirabilis ◽  
Rice Plant ◽  
Bacterial Colonization ◽  
Rrna Gene ◽  
Rice Seed ◽  
Phosphate Solubilizing Bacteria ◽  
Growth Properties ◽  
Rice Seeds ◽  
Phosphate Solubilizing

The research investigated the possibility of phosphate solubilizing bacteria (PSB) with plant growthpromoting (PGP) capabilities to improve growth properties of rice plant under ferruginous ultisol (FU) condition through bio-priming strategy. The PSB with PGP properties used in this research were Bacillus cereus strain GGBSU-1, Proteus mirabilis strain TL14-1 and Klebsiella variicola strain AUH-KAM-9 that were previously isolated and characterized following the 16S rRNA gene sequencing. Biosafety analysis of the PSB isolates was conducted using blood agar. The rice seeds were then bio-primed with the PSBs at 3, 12 and 24 hours priming durations and then sown in a composite FU soil sample. Differences in germination bioassay involving SEM, morphology, physiology and biomass parameters were investigated for 15 weeks after bio-priming. The composite FU soil used in the study had high pH, low bioavailable phosphorus, low water holding capacity and high iron levels which has led to a low growth properties of rice seeds without bio-priming in FU soil. Germination parameters was better in seeds bio-primed with the PSBs, especially at 12h priming duration as against seeds without priming. SEM showed more bacterial colonization in the PSB bioprimed seeds. Seed bio-priming of rice seed with Bacillus cereus strain GGBSU-1, Proteus mirabilis strain TL14-1 and Klebsiella variicola strain AUH-KAM-9 under FU soil condition significantly improved seed microbiome, rhizocolonization and soil nutrient properties, thereby enhancing growth properties of the rice plant. This suggest the ability of PSB to solubilize and mineralize soil phosphate and improve its availability and soil property for optimum plant usage in phosphate stressed and iron toxic soils.

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