299 ELECTROLYTE LEAKAGE FROM INDIVIDUAL MAIZE AND WHEAT SEEDS TO PREDICT GERMINATION PERCENTAGE AND RADICLE LENGTH

Multiple electroconductivity readings (μAmps) of leachates from individual seeds during the first 6 hr of imbibition was examined as a possible predictor of seed quality. Readings from each sample of 100 seeds were formed into frequency distributions and the mean, median. and internal slope were calculated using an automated computer retrieval system. Internal slope is a non-central tendency measure based on the slope of a line tangent to the inflection point of the S-shaped cumulative frequency distribution (CFD) of μAmps. Radicle lengths (3 days) and germination (7 days) percentages were regressed on each of the two measures of central tendency and also the CFD shape indicator, internal slope. None of the three predictors were satisfactory for estimating seed vigor (root lengths) of maize (Zea mays L.) or wheat (Triticum aestivum L.) or germination of wheat seed lots. Internal slope was useful in estimating viability of artificially aged maize seeds (r2= 0.91), which compared favorably with our previous results using naturally aged red clover (Trifolium pratense L.) seed lots. Overall the seed quality of the unaged wheat lots was fairly high and the electrolyte leakage test was not sensitive enough to detect differences within these lots.

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A Comparative Analysis of the Hybrid Maize (Zea mays L.) Seed Quality in China from 2013 to 2018

Agronomy ◽

10.3390/agronomy9100625 ◽

2019 ◽

Vol 9 (10) ◽

pp. 625

Author(s):

Heqin Li ◽

Haiwang Yue ◽

Li Li ◽

Chengfu Su ◽

Xiaowen Zhang ◽

...

Keyword(s):

Comparative Analysis ◽

Seed Quality ◽

Starch Content ◽

Seedling Emergence ◽

Principal Component ◽

Germination Percentage ◽

Seed Vigor ◽

Maize Seed ◽

The Past ◽

Hybrid Maize

In this study, a comparative analysis of seed quality indicators of 1196 hybrid maize seed samples from the main maize-producing areas in China from 2013 to 2018 was carried out. The results showed that the maize seed quality in China had changed obviously in the past six years, and was mainly as follows: The percentage of samples with coated seed in 2015–2018 was higher than 62.8% in 2013 and all exceeded 97%; the sample rate of packaging according to seed number was from 24.5% in 2013 to 58.6% in 2018, and the percentage of samples which met the prescribed quality standards was from 89.2% in 2013 to 98.4% in 2018. Principal component analysis indicated that standard germination energy (SGE), standard germination percentage (SGP), cold test germination percentage (CTGP), accelerated aging test germination percentage (AATGP), and mean field seedling emergence (FSE) were the primary predictors of seed germination and seedling emergence. Meanwhile, combining other statistical methods, regression models of SGE, SGP, CTGP, and AATGP were established to predict the field seedling emergence. Furthermore, seed bulk density and total starch content were correlated with seed vigor, which needs to be further studied. This study offered a theoretical basis and data support to better understand the changes of maize quality in China over the past six years, and provided an important reference to further improve the maize seed quality in the future.

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A Novel Method to Overcome Coat-Imposed Seed Dormancy in Lupinus albus L. and Trifolium pratense L.

Journal of Botany ◽

10.1155/2014/647469 ◽

2014 ◽

Vol 2014 ◽

pp. 1-6 ◽

Cited By ~ 3

Author(s):

Iskender Tiryaki ◽

Mustafa Topu

Keyword(s):

Seed Dormancy ◽

Trifolium Pratense ◽

Germination Rate ◽

Lupinus Albus ◽

Red Clover ◽

Treatment Method ◽

Germination Percentage ◽

Hot Water ◽

White Lupin ◽

Novel Method

We have developed a novel method to overcome coat-imposed seed dormancy in legume plants. Seeds of Lupinus albus L. and Trifolium pratense L. were stored in a freezer at −80°C for a period of time and then immediately treated with or without hot water at 90°C for 5 seconds. Germination tests were carried out in darkness at 20±1.0°C with four replications in a completely randomized design. Final germination percentage (FGP), germination rate, and synchrony of seeds were evaluated. The results showed that new approach of freeze-thaw scarification provided high percentage of germinations in white lupin (84.16%) and red clover (74.50%) seeds while control seeds had FGPs of 3.3% and 26.0%, respectively. The immediate thawing of frozen seeds in hot water for 5 seconds was found not only an effective and reliable but also the quickest seed treatment method to prevail against coat-imposed seed dormancy in legume species and may become operationally applicable to other plant species.

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Effect of PEG and mannitol to induce drought stress on seed quality and stand establishment in wheat (Triticum aestivum L.) genotypes

INTERNATIONAL JOURNAL OF AGRICULTURAL SCIENCES ◽

10.15740/has/ijas/17.2/469-475 ◽

2021 ◽

Vol 17 (2) ◽

pp. 469-475

Author(s):

S. B. Patil ◽

Jitendra Kumar S. Hilli

Keyword(s):

Triticum Aestivum ◽

Drought Tolerance ◽

Root Length ◽

Seed Quality ◽

Block Design ◽

Triticum Aestivum L ◽

Germination Percentage ◽

Shoot Length ◽

Seedling Vigour ◽

Wheat Genotypes

An experiment was conducted to study the screening of wheat (Triticum aestivum L.) genotypes for drought tolerance under laboratory condition during2018 at Department of Seed Science and Technology, College of Agriculture, Vijayapura. The experiment was carried out in a factorial Complete Randomized Block Design with seven treatments replicated three times. Twenty six wheat genotypes were screened for drought tolerance using 0, 15, 30, 60 per cent polyethylene ethylene glycol 6000 (PEG6000) and 1, 2, 5 per cent mannitol solutions. Data were recorded on various seedling parameters like germination percentage, root length, shoot length, seedling dry weight and seedling vigour index. The seedling traits showed a decreasing trend in response to increased concentrations of PEG6000 and mannitol. Wheat genotype DBW-110 (98.70 %) and C-306 (92.50 %) were found to be the best genotype for screened based on germination percentage at 15 per cent PEG6000 and 5 per cent mannitol. Wheat genotypes HI-1620 (6.7 cm) and NIAW-3212 (4.5 cm) produced maximum root length, respectively at higher concentrations of PEG6000 and mannitol. The genotype HI-1620 (6.4 cm, @ 15 %; 5.4 cm, @ 5 % mannitol) showed maximum shoot length. The genotype HD-2733, DBW-14, DBW-88 showed highest reduction of seedling parameters observed at increase in osmotic stress condition.

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Influence of corn (Zea mays L) seed processing with a locally produced sheller on seed quality and their damage

International Journal of Applied Sciences and Biotechnology ◽

10.3126/ijasbt.v1i2.8198 ◽

2013 ◽

Vol 1 (2) ◽

pp. 67-70

Author(s):

Pratima Pandey ◽

Jwala Bajrachrya ◽

S. Pokharel

Keyword(s):

Zea Mays ◽

Seed Quality ◽

Germination Percentage ◽

Seed Vigor ◽

Tetrazolium Salt ◽

Seed Moisture Content ◽

Seed Processing ◽

Root And Shoot Length ◽

Quality Assessments ◽

Maize Kernels

Maize (Zea mays dis.L.) is one of the most important staple crops in the world. Sindhupalchok, Kavre and Nuwakot were the three districts selected for the maize CBSP groups under the respective Agriculture Development Offices identified by CDD for the present study. Altogether 2x6x3 samples for the study were collected. Seed damage as broken seeds, damages on embryo, seed quality assessments like seed moisture content, pure seed percentage, seed vigor measured by root and shoot length, seed germination, and embryo damages were carried in seed testing laboratory in Seed Science & Technology Division (SSTD) Khumaltar following the ISTA Rules, 2007. For the embryo damage test, tetrazolium salt test (TZ) was conducted following the procedures prescribed for maize seed in ISTA Rules, 2007. All the samples possessed of 99 % of pure seed. It ranged from 99.51 % in Nuwakot to 99.96 % in Kavre for samples using corn sheller. They were found within the standards for pure seed and were of acceptable range. The corn sheller was found as efficient as that of hand shelling. There was not found the effect on the quality of seed that they were within the standard values. The germination percentage decreased from initial 96 to 85 (Kavre); 94 to 87 (Sindhupalchwok) and 91 to 83 (Nuwakot). This study concludes that the corn sheller techniques offer Wooden corn sheller is a simple but traditional device made locally for shelling the maize kernels and distributed to Community based seed production (CBSP) farmers contribute to minimizing the impacts of hand sheller on agricultural systems.DOI: http://dx.doi.org/10.3126/ijasbt.v1i2.8198 Int J Appl Sci Biotechnol, Vol. 1(2): 68-71

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Muskmelon seed priming in relation to seed vigor

Scientia Agricola ◽

10.1590/s0103-90162004000100019 ◽

2004 ◽

Vol 61 (1) ◽

pp. 114-117 ◽

Cited By ~ 20

Author(s):

Warley Marcos Nascimento ◽

Fernando Antônio Souza de Aragão

Keyword(s):

Low Temperature ◽

Interaction Effect ◽

Cucumis Melo ◽

Seed Quality ◽

Germination Rate ◽

Seed Priming ◽

Germination Percentage ◽

Seed Vigor ◽

Cucumis Melo L ◽

Aged Seeds

A number of important factors may affect seed priming response, including seed quality. Effects of seed vigor on seed priming response were investigated using seed lots of two muskmelon (Cucumis melo L.) cultivars. Seeds of muskmelon, cvs. Mission and Top Net SR were artificially aged at 43°C for 0, 20 and 40 hours. Seeds were primed for six days in darkness at 25°C in KNO3 (0.35 mol L-1) aerated solution. Aged seeds germinated poorly at 17°C. Priming increased germination rate at 17 and 25°C and germination percentage at 17°C. An interaction effect on germination performance between vigor and priming was observed, especially at low temperature. Priming increased germination performance in seeds of low vigor, and the response was cultivar dependent.

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Underseeded clover as a nitrogen source for spring wheat on a Gleysol

Canadian Journal of Soil Science ◽

10.4141/s99-060 ◽

2001 ◽

Vol 81 (1) ◽

pp. 93-102 ◽

Cited By ~ 9

Author(s):

M J Garand ◽

R R Simard ◽

A F MacKenzie ◽

C. Hamel

Keyword(s):

Spring Wheat ◽

Trifolium Pratense ◽

Wheat Yield ◽

Red Clover ◽

Triticum Aestivum L ◽

Yield Response ◽

Wheat Crop ◽

Catch Crop ◽

Eastern Canada ◽

Nutritional Effect

Although there is a potential to substantially reduce N fertiliser inputs by cropping spring cereals with an interseeded legume, the agronomic value and the nitrate catch-crop effect associated with this practice are not documented under the conditions of eastern Canada. This 3-yr study estimated N credits and non-N nutritional effects for interseeded clover (Trifolium pratense L. 'Arlington') in spring wheat production (Triticum aestivum L. 'Algot') and assessed fall and spring nitrate (NO3−) in soil. The soil is a St. Urbain clay (Orthic Gleysol) located in the St. Lawrence lowlands. Ammonium nitrate (NH4NO3) was applied at 0, 40, 80, 120 and 160 kg N ha-1 with or without red clover as a companion crop. Clover was incorporated as a green manure crop in mid-November. Clover significantly (P = 0.05) influenced wheat yield response to N fertilisation for 2 of the 3 yr. Clover did not reduce wheat grain yield through competition between the two plant species. Higher wheat yields with clover were attributed to N supplied by clover through mineralisation of residues incorporated in the soil the previous fall. Nitrogen fertiliser replacement value of clover was approximately 80 kg N ha-1 for 1994 and 1995. Clover occasionally increased NO3−-N measured in the soil profile in late fall and in spring. Interseeded red clover may provide most of the N needs of a companion spring wheat crop in fine-textured gleysolic soils, but is an inefficient N catch-crop. Key words: N credits, non-N nutritional effect, N catch-crop

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Effect of intercropping wheat with forage legumes on wheat production and ground cover

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2001000300010 ◽

2001 ◽

Vol 36 (3) ◽

pp. 465-471 ◽

Cited By ~ 4

Author(s):

Gilberto Omar Tomm ◽

Robert Kerry Foster

Keyword(s):

Grain Yield ◽

Trifolium Pratense ◽

Wheat Yield ◽

Red Clover ◽

Ground Cover ◽

Soil Surface ◽

Triticum Aestivum L ◽

First Year ◽

Forage Legumes ◽

Trifolium Pratense L

The use of winter legumes in southern Brazil is hindered by the slow growth of these species during establishment exposing soil surface to erosion. Introduction of these species along with spring wheat (Triticum aestivum L.) was studied as a means of increasing ground cover during their initial establishment period, without reducing wheat grain yield. Two experiments were conducted in nearby areas, one in each year. Birdsfoot trefoil (Lotus corniculatus L.), red clover (Trifolium pratense L.) cultivar Quiñequelli, white clover (T. repens L.), and arrowleaf clover (T. vesiculosum Savi) did not reduce cereal yield in either year. Wheat yield was reduced by intercropped red clover cultivar Kenland and by subclover (T. subterraneum L.) in the first year. No grain yield differences due to intercropping with any legume were detected in the second year, when rainfall was below normal. Intercropping with wheat showed to be a practical alternative to enhance ground cover at establishing forage legumes.

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Influence of seed priming on germination characteristics of sorghum (Sorghum bicolor L. Moench)

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/911/1/012086 ◽

2021 ◽

Vol 911 (1) ◽

pp. 012086

Author(s):

Ramlah Arief ◽

Fauziah Koes ◽

Oom Komalasari ◽

Fatmawati

Keyword(s):

Seed Quality ◽

Germination Rate ◽

Primary Root ◽

Dry Weight ◽

Seed Priming ◽

Germination Percentage ◽

Quality Parameters ◽

Seed Vigor ◽

Germination Characteristics ◽

Positive Effect

Abstract Seed priming or invigoration is presowing treatments of improving germination aimed to reduce the time from sowing to emergence and improving emergence uniformity. Research on seed priming was conducted Indonesian Cereal Research Institute (ICERI) seed laboratory from January until March 2021 to evaluate the effect of seed priming on sorghum seed vigor. Seed quality parameters includes germination percentages, germination rate, shoot and primary root length, seedling dryweight, Sorghum seed variety of Suri 4 were used as seed material. Results showed that among the priming treatments that give positive effect on germination percentage, germination rate, seedling dry weight were priming treatment with KNO3 1.5%.

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Seed vigor of Katepwa Wheat: Interaction of kernel water content and threshing cylinder speed

Canadian Journal of Plant Science ◽

10.4141/cjps91-093 ◽

1991 ◽

Vol 71 (3) ◽

pp. 619-627

Author(s):

Martin H. Entz ◽

Jack Moes ◽

Elmer H. Stobbe

Keyword(s):

Triticum Aestivum ◽

Water Content ◽

Seed Quality ◽

Wheat Plant ◽

Triticum Aestivum L ◽

Seed Vigor ◽

Wheat Seed ◽

Important Goal ◽

Seed Damage ◽

Field Emergence

An important goal in seed production is the maintenance of seed vigor. Breakage of wheat seed (Triticum aestivum L.) during threshing can be reduced by threshing at relatively high kernel water content (KWC) and low cylinder speed. The purpose of this study was to investigate the interacting effects of KWC and threshing cylinder speed on seed vigor and field emergence of Katepwa wheat. Wheat plants were harvested at approximately 250 g kg−1 (dry basis) KWC and allowed to dry for varying lengths of time, then were threshed at cylinder speeds of 450, 850, and 1250 rpm using a Vogel thresher. At threshing, KWC averaged 89, 121, 156 and 231 g kg−1. Significant KWC × cylinder speed interactions occurred for seed yield per plot and various seed vigor indicators. Threshing at 850 rpm gave the highest yield of uncracked seeds regardless of KWC. Threshing at 450 rpm was incomplete, especially at high KWC, while threshing at 1250 rpm caused high levels of external seed damage, especially at low KWC. Vigor of uncracked seed was measured by cold germination tests. Increasing cylinder speed reduced cold germination, especially at high KWC. The incidence of abnormal seedlings and leachate conductivity increased with cylinder speed but increased only slightly as KWC decreased. Field emergence decreased with increasing cylinder speed, but was not affected by KWC at threshing. The number of abnormal seedlings in cold germination tests and leachate conductivity were the best indicators of field emergence. Threshing cylinder speed had a greater influence than KWC on seed damage, vigor, and field emergence. The results of this study are of greatest direct interest to plant breeders who use Vogel threshers regularly. Key words: Seed quality, seed vigor, seed damage, threshing, wheat, plant breeding, Triticum aestivum L.

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