Different statistical procedures for selection of salt tolerant barley genotypes at germination stage

2017 ◽  
Vol 51 (05) ◽  
Author(s):  
Hossein Askari ◽  
Seiyed Kamal Kazemitabar ◽  
Hamid Najafi Zarrini ◽  
Mohammd Hossein Saberi
Keyword(s):  
Geometric Mean ◽  
High Yield ◽  
Growth Stages ◽  
Salt Tolerant ◽  
Statistical Procedures ◽  
Matter Production ◽  
Productivity Indices ◽  
High Level ◽  
Tolerance Indices ◽  
Barley Genotypes

Growing of salt tolerant crops is a good option to obtain economical yields from saline areas and screening salt tolerant plants, particularly in early growth stages as one of the most important determinants of high yield, is important. So a laboratory experiment was performed to assess several indices for identifying barley genotypes with better performance under saline conditions. The effect of salinity stress was studied through an analysis of the dry matter production, that yielding results showed significant differences among genotypes. The multiple statistical procedures which have been used in this study showed that mean productivity and geometric mean productivity indices could be a useful indicator of desirable genotypes in both stress and non-stress conditions at this stage especially in high level of salinity. The majority of used tolerance indices indicated that MBS8715 was the best barley genotype showing the highest stress resistance for the most salt concentration.

scholarly journals Effect of Irrigation and N-fertigation Levels on Broccoli Performance in a Polynet House

2021 ◽  
pp. 261-267
Author(s):  
Sathyamurthy Naik ◽  
K. S. Kumar ◽  
Sai Kumar Rondla ◽  
K. Kishan
Keyword(s):  
Drip Irrigation ◽  
Block Design ◽  
Climatic Conditions ◽  
High Yield ◽  
Growth Stages ◽  
Green Colour ◽  
Randomized Block Design ◽  
Matter Production ◽  
Npk Uptake ◽  
Set Up

The purpose of this study is to see how the microclimate of the polynet house, irrigation, and fertigation levels affect broccoli output. The experiment was set up in a randomized block design within bounds beneath a polynet house with 320 m2 floor area covered with 50% perforated green colour net. Plant height, dry matter production yield, and its attributes were found to be maximum in drip irrigation (1.0Epan) + 125 % N at all growth stages, as per effect of scheduled irrigation and fertigation levels on crop biometric performance. Drip irrigation (1.0Epan) + 125% N resulted in a high higher yield (22.02 t ha-1); while treatments drip irrigation (1.5 Epan) + 75% N resulted as in lowest yield (18.02 t ha-1).The treatment drip irrigation (1.0Epan) + 125% N had a maximum NPK uptake. Polynet house covered with 50% perforation of green colour is suitable for realizing favorable microclimate for broccoli cultivation. Drip irrigation scheduled at 1.0 E pan with 125%N in the poly net house is recommended for broccoli production in central Telanganaagro-climatic conditions as it maintained high yield and water use efficiency.

scholarly journals Salt tolerance assessment of barley (Hordeum vulgare L.) genotypes at germination stage by tolerance indices

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Hossein Askari ◽  
Seiyed Kamal Kazemitabar ◽  
Hamid Najafi Zarrini ◽  
Mohammd Hossein Saberi
Keyword(s):  
Stress Tolerance ◽  
Geometric Mean ◽  
Germination Percentage ◽  
Tolerance Index ◽  
Hordeum Vulgare L ◽  
Randomized Design ◽  
Stress Susceptibility ◽  
Tolerance Indices ◽  
Barley Genotypes ◽  
Germination Stage

AbstractThis study was performed to assess several indices for identifying genotypes at germination stage with the best performance in salinity conditions. In order to evaluate the seed germination of barley genotypes in different levels of salt conditions, an experiment was conducted as factorial arrangement with a completely randomized design with 3 replications. The effect of salinity treatments was studied through an analysis of the germination, yielding results that show significant differences among genotypes. Stress tolerance index, stress tolerance, stress susceptibility index, germination reduction ratio, mean productivity and geometric mean productivity were used. The majority of used indices indicated that ESBYTM8910, 4 Shori and MBS8715 were the best barley genotypes showing the highest stress resistance for the greatest NaCl concentration. This result was similar to those obtained from the analysis of variance and statistical comparison of means of genotypes germination percentages. There were positive and strong correlations of germination percentage in normal and stress condition with STI in high levels of salinity. Thus, this correlation seems to be a useful indicator of tolerant genotypes at this stage.

scholarly journals Assessment of Barley Genotypes Response to Salinity Stress at Early Seedling Growth Stage

2020 ◽  
Vol 63 (3) ◽  
pp. 179-186
Author(s):  
Hossein Askari ◽  
Seyed Kamal Kazemitabar ◽  
Hamid Najafi Zarrini ◽  
Mohammd Hossein Saberi
Keyword(s):  
Dry Matter ◽  
Growth Stage ◽  
Early Growth ◽  
Stability Parameters ◽  
Early Seedling Growth ◽  
Matter Production ◽  
Nacl Concentration ◽  
Early Seedling ◽  
Tolerance Indices ◽  
Barley Genotypes

 This study was performed to assess several indices for identifying barley genotypes at early growth stage with the best performance in salinity conditions. The effect of salinity treatments was studied through an analysis of the dry matter production, results showed significant differences among genotypes. The majority of used tolerance indices indicated that ESBYTM8910, 4 Shori and MBS8715 were the best barley genotypes showing the highest stress resistance for the greatest NaCl concentration. It is based on used stability parameters that the genotypes MBS8712 and Jo torsh were the most phenotypically stable. In general, the tolerant genotypes showed the least stability based on mostly of stability parameters  

scholarly journals ASSESSMENT OF TOLERANCE AND STABILITY IN BARLEY (HORDEUM VULGARE L.) GENOTYPES AT EARLY SEEDLING GROWTH STAGE UNDER SALINE CONDITION

2018 ◽  
Vol 78 ◽  
pp. 69-81
Author(s):  
Hossein Askari ◽  
Seiyed Kamal Kazemitabar ◽  
Hamid Najafi Zarrini ◽  
Mohammd Hossein Saberi
Keyword(s):  
Growth Stage ◽  
Hordeum Vulgare L ◽  
Stability Parameters ◽  
Early Seedling Growth ◽  
Matter Production ◽  
Nacl Concentration ◽  
Early Seedling ◽  
Tolerance Indices ◽  
Barley Genotypes ◽  
Better Than

This study was performed to assess several indices for identifying genotypes at early growth stage with thebest performance in salinity conditions. In order to evaluate the biomass production of barley genotypes indifferent levels of salt conditions, an experiment was conducted as factorial arrangement with a completelyrandomized design with 3 replications. The effect of salinity treatments was studied through an analysis of thedry matter production, yielding results that show significant differences among genotypes. The majority ofused tolerance indices indicated that ESBYTM8910, 4 Shori and MBS8715 were the best barley genotypesshowing the highest stress resistance for the greatest NaCl concentration. Based on used stability parametersthe genotypes MBS8712 and Jo torsh were the most phenotypically stable. Result of cluster analysis revealedthat tolerant genotypes showed the least stability based on mostly of stability parameters. In general, resultsshowed the WB7910, ESBYTM8910 and MBS8715 genotypes appeared better than others across the salinitylevels.

scholarly journals Assessment of watermelon accessions for salt tolerance using stress tolerance indices

2017 ◽  
Vol 41 (6) ◽  
pp. 616-625 ◽  
Author(s):  
Ercan Ekbic ◽  
Cagri Cagıran ◽  
Kursat Korkmaz ◽  
Malik Arsal Kose ◽  
Veysel Aras
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Stress Tolerance ◽  
Geometric Mean ◽  
Principal Component ◽  
Saline Stress ◽  
Tolerance Index ◽  
Salt Tolerant ◽  
Starting Point ◽  
Tolerance Indices

ABSTRACT Salt stress is the most significant constraint for agricultural production in arid and semi-arid regions. Thus, genetically improved stress-tolerant varieties are needed for the future. The identification of salt-tolerant genotypes is the starting point for such breeding studies. This study was conducted to determine and assess the tolerance of different watermelon genotypes under saline conditions. Twenty-two watermelon genotypes and accessions were grown in pots with 3 kg of soil in four saline stress conditions (0 mmol kg-1 as the control, 25, 50 and 100 mmol kg-1 NaCl). The detrimental effects of salt stress on the plants were evident with increasing doses of NaCl. Stress indices calculated over the plant dry weights under the 100 mmol kg-1 salinity level were used to assess the salt tolerance of the genotypes. Stress intensity was calculated as 0.76. Such a value indicated that the highest dose of salt exerted severe stress on the plants. The G04, G14 and G21 genotypes were considered to be salt tolerant, since these genotypes showed the highest values of K/Na and Ca/Na ratios in the plant tissue. The losses in dry mass at severe salt stress reached 75.48%. In principal component analyses, the genotypes had positive correlations with stress tolerance indices of MP (mean productivity), GMP (geometric mean productivity) and STI (stress tolerance index). The GMP and STI indices indicated that G04 (a member of Citrullus colocynthis), G14 and G21 could be prominent sources to develop salt tolerance.

scholarly journals Early Growth Stage Characterization and the Biochemical Responses for Salinity Stress in Tomato

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 712
Author(s):  
Md Sarowar Alam ◽  
Mark Tester ◽  
Gabriele Fiene ◽  
Magdi Ali Ahmed Mousa
Keyword(s):  
Salt Tolerance ◽  
Salinity Tolerance ◽  
Salinity Treatment ◽  
Salt Tolerant ◽  
Improvement Program ◽  
Biochemical Basis ◽  
Elevated Salinity ◽  
Tolerance Indices ◽  
Promising Source ◽  
Tomato Genotypes

Salinity is one of the most significant environmental stresses for sustainable crop production in major arable lands of the globe. Thus, we conducted experiments with 27 tomato genotypes to screen for salinity tolerance at seedling stage, which were treated with non-salinized (S1) control (18.2 mM NaCl) and salinized (S2) (200 mM NaCl) irrigation water. In all genotypes, the elevated salinity treatment contributed to a major depression in morphological and physiological characteristics; however, a smaller decrease was found in certain tolerant genotypes. Principal component analyses (PCA) and clustering with percentage reduction in growth parameters and different salt tolerance indices classified the tomato accessions into five key clusters. In particular, the tolerant genotypes were assembled into one cluster. The growth and tolerance indices PCA also showed the order of salt-tolerance of the studied genotypes, where Saniora was the most tolerant genotype and P.Guyu was the most susceptible genotype. To investigate the possible biochemical basis for salt stress tolerance, we further characterized six tomato genotypes with varying levels of salinity tolerance. A higher increase in proline content, and antioxidants activities were observed for the salt-tolerant genotypes in comparison to the susceptible genotypes. Salt-tolerant genotypes identified in this work herald a promising source in the tomato improvement program or for grafting as scions with improved salinity tolerance in tomato.

Echinoderm skeletal crystallography and paleobiological applications

1997 ◽  
Vol 3 ◽  
pp. 191-204 ◽  
Author(s):  
B. E. Bodenbender
Keyword(s):  
Skeletal Structure ◽  
Growth Stages ◽  
Full Potential ◽  
Initial Growth ◽  
Developmental Sequence ◽  
Coarse Scale ◽  
Common Pattern ◽  
Plate Morphology ◽  
Oriented Parallel ◽  
High Level

The crystallographic orientations of echinoderm skeletal elements can supplement standard morphological comparisons in the exploration of echinoderm evolution. At a coarse scale, many echinoderms share a crystallographic pattern in whichcaxes radiate away from the axis of pentaradial symmetry. Within this common pattern, however,caxes of different taxa can differ dramatically in their degree of variability, angles of inclination, and relationships to the external morphology of skeletal elements. Crystallographic data reflect a variety of taxon-specific influences and therefore reveal different information in different taxa. In echinoids, orientations ofcaxes in coronal plates correlate well with high-level taxonomic groupings, whilecaxes of apical plates record modes of larval development. In blastoids,caxes of radial plates have a structural interpretation, with thecaxis oriented parallel to the orientation of the surface of the radial plate during its initial growth stages. In crinoids,caxes do not correlate with taxonomic group, plate morphology, or developmental sequence, but instead correlate with relative positions of skeletal elements on the calyx. Although their full potential has yet to be explored, the varied crystallographic patterns in echinoderms have been used to clarify skeletal structure, characterize developmental anomalies, and infer homologies of skeletal plates both within specimens and between groups. A axes are less constrained in their orientations thancaxes and offer less promise of revealing novel paleobiological information.

scholarly journals Multi-curie production of gallium-68 on a biomedical cyclotron and automated radiolabelling of PSMA-11 and DOTATATE

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Helge Thisgaard ◽  
Joel Kumlin ◽  
Niels Langkjær ◽  
Jansen Chua ◽  
Brian Hook ◽  
...  
Keyword(s):  
Radiochemical Purity ◽  
High Yield ◽  
Clinical Use ◽  
Automated Production ◽  
Automated Method ◽  
Gallium 68 ◽  
High Yields ◽  
High Level ◽  
Mev Protons ◽  
Very High

Abstract Background With increasing clinical demand for gallium-68, commercial germanium-68/gallium-68 ([68Ge]Ge/[68Ga]Ga) generators are incapable of supplying sufficient amounts of the short-lived daughter isotope. In this study, we demonstrate a high-yield, automated method for producing multi-Curie levels of [68Ga]GaCl3 from solid zinc-68 targets and subsequent labelling to produce clinical-grade [68Ga]Ga-PSMA-11 and [68Ga]Ga-DOTATATE. Results Enriched zinc-68 targets were irradiated at up to 80 µA with 13 MeV protons for 120 min; repeatedly producing up to 194 GBq (5.24 Ci) of purified gallium-68 in the form of [68Ga]GaCl3 at the end of purification (EOP) from an expected > 370 GBq (> 10 Ci) at end of bombardment. A fully automated dissolution/separation process was completed in 35 min. Isolated product was analysed according to the Ph. Eur. monograph for accelerator produced [68Ga]GaCl3 and found to comply with all specifications. In every instance, the radiochemical purity exceeded 99.9% and importantly, the radionuclidic purity was sufficient to allow for a shelf-life of up to 7 h based on this metric alone. Fully automated production of up to 72.2 GBq [68Ga]Ga-PSMA-11 was performed, providing a product with high radiochemical purity (> 98.2%) and very high apparent molar activities of up to 722 MBq/nmol. Further, manual radiolabelling of up to 3.2 GBq DOTATATE was performed in high yields (> 95%) and with apparent molar activities (9–25 MBq/nmol) sufficient for clinical use. Conclusions We have developed a high-yielding, automated method for the production of very high amounts of [68Ga]GaCl3, sufficient to supply proximal radiopharmacies. The reported method led to record-high purified gallium-68 activities (194 GBq at end of purification) and subsequent labelling of PSMA-11 and DOTATATE. The process was highly automated from irradiation through to formulation of the product, and as such comprised a high level of radiation protection. The quality control results obtained for both [68Ga]GaCl3 for radiolabelling and [68Ga]Ga-PSMA-11 are promising for clinical use.

708 A NEW DIAGNOSTIC PARADIGM FOR LARYNGOPHARYNGEAL REFLUX DISEASE: CORRELATION OF IMPEDANCE-PH MONITORING AND DIGITAL REFLUX SCINTIGRAPHY RESULTS

2021 ◽  
Vol 34 (Supplement_1) ◽  
Author(s):  
Jin-soo Park ◽  
Oleksandr Khoma ◽  
Hans Van Der Wall ◽  
Gregory Falk
Keyword(s):  
Laryngopharyngeal Reflux ◽  
Ph Monitoring ◽  
Acid Reflux ◽  
High Rate ◽  
High Yield ◽  
Time Activity ◽  
Proximal Esophagus ◽  
Laryngopharyngeal Reflux Disease ◽  
High Level ◽  
No Gold Standard

Abstract   No gold-standard investigation exists for laryngopharyngeal reflux (LPR). Multichannel intraluminal impedance (MII)-pH testing has uncertain utility in LPR. Meanwhile, reflux scintigraphy allows immediate and delayed visualisation of tracer reflux in the esophagus, pharynx, and lungs. The present study aimed to correlate MII-pH and scintigraphic reflux results in patients with primary LPR. Methods Consecutive patients with LPR underwent MII-pH and scintigraphic reflux studies. Abnormal values for MII-pH results were defined from existing literature. MII-pH and scintigraphic data were correlated. Results 105 patients with LPR (31 males (29.5%), median age 60 years (range: 20–87)) were studied. Scintigraphic reflux was seen in the pharynx in 94 (90.4%), and in the proximal esophagus in 94 (90.4%). Delayed scintigraphic contamination of the pharynx was seen in 101 patients (96.2%) and in the lungs of 56 patients (53.3%). Abnormal reflux was seen in the distal esophagus in 12.4%, proximal esophagus in 25.7%, and in the pharynx in 82.9%. Patients with poor scintigraphic clearance had higher Demeester scores (p = 0.043), more proximal reflux episodes (p = 0.046), more distal acid reflux episodes (p = 0.023), and longer bolus clearance times (p = 0.002). Conclusion Reflux scintigraphy has a high yield in LPR patients. Scintigraphic time-activity curves correlated with validated MII-pH results. A high rate of pulmonary microaspiration was found in LPR patients. This study demonstrated a high level of pharyngeal contamination by scintigraphy and MII-pH, which supports the use of digital reflux scintigraphy in diagnosing LPR.

scholarly journals Screening of Salt Tolerant CIP Potato Germplasm for Saline Areas

2013 ◽  
Vol 11 (1) ◽  
pp. 95-102 ◽  
Author(s):  
MH Rahman ◽  
MM Alam Patwary ◽  
H Barua ◽  
M Hossain ◽  
MM Hasan
Keyword(s):  
Soil Salinity ◽  
Agricultural Research ◽  
Saline Soil ◽  
The Other ◽  
Salt Tolerant ◽  
Agricultural Research Institute ◽  
International Potato ◽  
Local Variety ◽  
Potato Germplasm ◽  
High Level

Fifteen salt tolerant CIP (International Potato Centre) Potato genotypes along with BARI (Bangladesh Agricultural Research Institute) Alu 7 (Diamant) and one local variety viz., Dohazari Sada were evaluated at Bashkhali, Chittagong during 2011-12 to screen the suitable genotypes for cultivation in saline areas of Bangladesh. Diamant and Dohazari Sada and all of the CIP genotypes were found to grow well up to 60 DAP (Days After Planting) at saline areas having healthy plants and no senescence was noticed but after that 61-100% plants died due to high level of soil salinity (6.41dS/m) depending on genotypes. Genotype CIP 112 gave the highest yield (21.07 t/ha) and CIP 102 was comparatively less affected by soil salinity than the other genotypes. However, all the salt tolerant CIP genotypes were found to be promising in the saline soil. DOI: http://dx.doi.org/10.3329/agric.v11i1.15249 The Agriculturists 2013; 11(1) 95-102

Sign in / Sign up

Export Citation Format

Share Document