scholarly journals The optimal germination substratum for tomato (Lycopersicon lycopersicum(L.) Karst, ex Farw.) seed testing

1990 ◽  
Vol 7 (3) ◽  
pp. 201-204 ◽  
Author(s):  
W. A. Loubser ◽  
H. A. van de Venter
Keyword(s):  
Seed Testing ◽  
Lycopersicon Lycopersicum

APLIKASI METODE OVEN SUHU TINGGI TETAP DAN BENIH UTUH DALAM PENGUJIAN KADAR AIR BENIH KELAPA SAWIT (Elaeis guineensis L. Jacq.)

2018 ◽  
Vol 26 (3) ◽  
pp. 153-159
Author(s):  
Mohamad Arif ◽  
Nur Muhammad Akbar Illahi
Keyword(s):  
Elaeis Guineensis ◽  
Seed Testing

Kadar air (KA) benih merupakan salah satu faktor penting yang menentukan tingkat viabilitas selama penyimpanan maupun pengecambahan benih. Oleh karena itu, kemampuan untuk menduga KA benih dengan tepat merupakan kebutuhan dasar bagi produsen kecambah. Bagi benih-benih berukuran besar seperti benih kelapa sawit, International Seed Testing Association (ISTA) mensyaratkan penggunaan oven suhu tinggi dan suhu rendah serta penerapan pemecahan benih untuk penentuan KA yang lebih tepat, sedangkan produsen menggunakan benih utuh untuk proses penentuan parameter tersebut. Hasil percobaan memperlihatkan bahwa benih-benih yang diuji dengan oven suhu rendah konstan memberikan nilai KA yang lebih tinggi dibanding KA yang diperlihatkan oleh metode oven suhu tinggi. Selain itu, benih yang dianalisis secara utuh memberikan nilai KA yang tidak berbeda nyata dengan KA benih yang dianalisis dengan metode pemecahan benih. Berdasar komponen penyusun, inti benih memiliki KA yang secara nyata lebih tinggi dibanding KA pada cangkang, baik menggunakan metode oven suhu rendah ataupun suhu tinggi. Percobaan lebih lanjut dibutuhkan mengingat luasnya keragaman ketebalan cangkang benih kelapa sawit.

A needle in a seedstack: an improved method for detection of rare alleles in bulk seed testing through KASP

2021 ◽  
Author(s):  
Anthony Brusa ◽  
Eric L Patterson ◽  
Todd A Gaines ◽  
Kevin Dorn ◽  
Philip Westra ◽  
...  
Keyword(s):  
Improved Method ◽  
Seed Testing ◽  
Rare Alleles

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.

scholarly journals EFFECT OF FERTILIZER FACTORY WASTES ON SEED GERMINATION, PLANT GROWTH AND ROOT-KNOT DISEASE DEVELOPMENT IN TOMATO (Lycopersicon lycopersicum L.) PLANTS

2017 ◽  
Vol 2 (2) ◽  
pp. 151
Author(s):  
Gopal Dixit
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Meloidogyne Incognita ◽  
Research Paper ◽  
Shoot Length ◽  
Disease Development ◽  
Root And Shoot Length ◽  
Percent Germination ◽  
Lycopersicon Lycopersicum

In the present research paper studies have been made on fertilizer factory wastes on percent seed germination, root and shoot length of plants and development of root-knot galls by Meloidogyne incognita in five cultivars of tomato. Though all the cultivars showed almost similar impact of fertilizer wastes on seed germination, plant growth and resistance for root-knot disease with little variation. Percent germination of seeds and plant growth was found decreased while the root-knot index was increased along with the increase in concentration of fertilizer wastes.

scholarly journals CONDUTIVIDADE ELÉTRICA EM SEMENTES DE TOMATE (Lycopersicon lycopersicum L.)

1999 ◽  
Vol 56 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Marco Eustáquio de Sá
Keyword(s):  
De Se ◽  
Lycopersicon Lycopersicum

Sementes de tomate, sendo dois lotes comerciais do cultivar Petomech e dois lotes do cultivar Santa Clara, foram estudados com o objetivo de se avaliar as variações nos resultados de teste de condutividade elétrica, em função do período de embebição (6, 12, 18 e 24 horas) e do número de sementes utilizadas no teste (25, 50 e 100), procurando-se relacionar os resultados com a emergência das plântulas e o desempenho das sementes em outros testes, em tres épocas de avaliação. Os resultados obtidos mostraram comportamento diferenciado dos cultivares, com valores mais altos de condutividade elétrica para as sementes do cultivar Petomech. Observaram-se também diferenças acentuadas entre os dois lotes do cultivar Petomech em termos de condutividade. Os acréscimos dos valores de condutividade com o decorrer da embebição corresponderam a queda no vigor das sementes independentemente do cultivar.

scholarly journals Effect of colour and size grading of China aster (Callistephus chinensis Nees) seeds on their germination

2012 ◽  
Vol 62 (2) ◽  
pp. 187-191 ◽  
Author(s):  
Agnieszka Rosińska ◽  
Grzegorz Rosiński ◽  
Roman Hołubowicz
Keyword(s):  
Seed Testing ◽  
Royal Horticultural Society ◽  
China Aster ◽  
Colour Chart ◽  
Size Grading ◽  
Better Than

Seeds of 3 commercial China aster (<i>Callistephus chinensis</i> Nees) lots were divided by hand into 3 grades with different colours: dark brown, brown and light brown, and 2 grades with a different size: length below 3.9 mm (small) and above 3.9 mm (large). The colour grading was done based on the Royal Horticultural Society Colour Chart and size grading was done by hand for each seed. Then, seeds were routinely germinated based on the International Seed Testing Association (ISTA) rules. The size of seeds had no effect on their germination. The dark brown seeds germinated better than the light brown ones. Removing light brown seeds from the China aster seed lot improved their germination.

scholarly journals Gasified Rice Hull Biochar Affects Nutrition and Growth of Horticultural Crops in Container Substrates

2013 ◽  
Vol 31 (4) ◽  
pp. 195-202 ◽  
Author(s):  
James C. Locke ◽  
James E. Altland ◽  
Craig W. Ford
Keyword(s):  
Nutrient Deficiency ◽  
Potassium Phosphate ◽  
Rice Hull ◽  
Horticultural Crops ◽  
Helianthus Annus ◽  
Lycopersicon Lycopersicum ◽  
Foliar Concentrations ◽  
The Difference ◽  
Phosphorus And Potassium ◽  
Soilless Substrate

This research was conducted to determine if gasified rice hull biochar (GRHB), inherently high in phosphorus and potassium content, could be used as an amendment to container substrates to eliminate the need for other phosphorus and potassium fertilizers. Geranium (Pelargonium xhortorum ‘Maverick Red’), pansy (Viola xwittrockiana ‘Mammoth Blue Deep Dazzle’), sunflower (Helianthus annus ‘Pacino Gold’), zinnia (Zinnia elegans ‘Oklahoma White’), and tomato (Lycopersicon lycopersicum ‘Mega Bite’) were grown in a standard commercial soilless substrate composed of sphagnum peat moss:perlite (85:15, by vol) and amended with 0, 5, or 10% GRHB (by vol). A group of plants labeled as NPK-fertilized controls were fertilized with 7.1 mM nitrogen (N), 0.7 mM phosphorus (P), and 1.4 mM potassium (K) derived from ammonium nitrate (NH4NO3) and potassium phosphate (K2HPO4). Other treatments received 0, 5, or 10% GRHB and fertilized with 7.1 mM N using NH4NO3. Gasified rice hull biochar had little effect on substrate pH over the course of the experiment. While pH was higher with 10% GRHB than NPK-fertilized controls by 6 weeks after potting (WAP), the difference was only 0.19 pH units. The GRHB used in this study provides a source of readily available phosphate and potassium when incorporated at 5 or 10%. While the five crops grown in this study were of similar size and lacked any signs of nutrient deficiency when amended with GRHB, foliar concentrations of P and K were low when their only source was from pre-incorporated GRHB.

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