scholarly journals Carbon dioxide quantified by the infrared in evaluation of respiratory activity of wheat seeds

Revista CERES ◽  
2017 ◽  
Vol 64 (5) ◽  
pp. 507-515
Author(s):  
João Alexandre Lopes Dranski ◽  
Marlene de Matos Malavasi ◽  
Ubirajara Contro Malavasi ◽  
Ivan Schuster ◽  
Norma Lazaretti
Keyword(s):  
Carbon Dioxide ◽  
Triticum Aestivum ◽  
Respiratory Activity ◽  
Carbon Dioxide Concentration ◽  
Correlation Coefficients ◽  
Reference Method ◽  
Triticum Aestivum L ◽  
Simple Correlation ◽  
Precision And Accuracy ◽  
Different Levels

ABSTRACT The objective of this study was to develop and validate the methodology of carbon dioxide concentration in the evaluation of vigor of Triticum aestivum L. seeds based on infrared spectroscopy. The proposed method quantifies CO2 content using a drag system and exhaustion to the gas released by the seeds. Samples of 50 seeds of six lots of cultivar CD 123 were incubated at temperatures of 15, 25 and 40 °C. The CO2 content released after 1, 3, 6, 9, 12 and 24 h of incubation were quantified. Additionally, the percentage of normal seedlings emerged in the field were evaluated. The simple correlation coefficients were evaluated among tests. After determining the reading conditions, the precision and accuracy of the proposed method were evaluated, using 15 lots of seeds. For the evaluation of the respiratory activity in Triticum aestivum seeds, a sample of 25 seeds, incubated at 25 °C for a minimum of 12 h is recommended since it allows to classify lots with different levels of vigor and predict the establishment of seedlings in the field, being the appropriate method for measuring CO2 as it externalizes precision between successive measurements and agreement with the reference method.

scholarly journals Carbon dioxide quantified by the infrared in respiratory activity evaluation in corn seeds

2017 ◽  
Vol 38 (3) ◽  
pp. 1115
Author(s):  
João Alexandre Lopes Dranski ◽  
Marlene De Matos Malavasi ◽  
Ubirajara Contro Malavasi ◽  
Ivan Schuster ◽  
Norma Schlickmann Lazaretti
Keyword(s):  
Carbon Dioxide ◽  
Respiratory Activity ◽  
Carbon Dioxide Concentration ◽  
Correlation Coefficients ◽  
Reference Method ◽  
Accuracy And Precision ◽  
Physiological Quality ◽  
Detection Chamber ◽  
Different Levels

The respiratory activity is one of the first biological manifestations of vigor loss and detecting it can help the monitoring and quality control of seed production by seed industries. This research aimed to develop and validate the methodology of the carbon dioxide concentration in the evaluation of physiological quality of Zea mays (L.) seeds. The proposed method is grounded on the measurement of the CO2 content by infrared through a drag system and exhaustion of the gas released by the seed maintained in a closed system up to the detection chamber of the gas meter. Samples of 15, 20 and 25 seeds of 6 lots of cultivar CD 384 Hx were incubated at temperatures of 15, 25 and 40 °C. The CO2 content released after 1, 3, 6, 9, 12 and 24 h of incubation were quantified. In parallel, the percentage of normal seedlings emerged in the field were evaluated. The simple correlation coefficients among tests were calculated. After determining the reading conditions, the accuracy and precision of the proposed method were evaluated, using 15 seed lots. For the evaluation of the respiratory activity in Z. mays seeds, we recommend a sample of 25 seeds, incubated at 15 °C for a maximum of 12 h, which allows to classify lots with different levels of vigor and predict the establishment of seedlings in the field, being the appropriate method for measuring CO2 as it externalizes precision between successive measurements and agreement to the reference method.

scholarly journals The Effect of Applying the Bat Guano of Some Yield Traits of Wheat Triticum aestivum L.

2018 ◽  
Vol 7 (1) ◽  
pp. 42-48
Author(s):  
Sameer Sarhan Khaleel
Keyword(s):  
Triticum Aestivum ◽  
Winter Season ◽  
Triticum Aestivum L ◽  
College Of Education ◽  
Yield Traits ◽  
Field Environment ◽  
Experimental Treatments ◽  
Different Levels ◽  
Better Than ◽  
Bat Guano

Pot experiment is carried out at the greenhouse belongs to the college of Education-university of Al-Anbar during Winter season 2013/2014 to investigate the effect of application of different levels of bat guano (0, 4 and 8gm) on some yield  traits for two bread wheat Triticum aestivum L. Cvs, one is local cv. (Aliz) another one is imported from Australia (Eratom). The experimental treatments are distributed according factorial experiment arrangement using completely randomized blocks with three replicates. Some traits are measured as spikes no per plant, spike length, spike weight, grains nos. per spike and grains weight per pot. Results reveal that bat guano application of 8gm is significantly superior in the average of. It thus could be concluded that the application of bat guano at 8gm alone is the better than 4gm in some traits. However, the genetic affinity of local cv is dominated with 4gm application and of imported cv is to 8gm application. Therefore, it could be recommended to test the application of bat guano on the two cultivars across field environment

Shoot Growth Curve Analysis of Wheat (Triticum aestivum L.) Receiving Different Levels of Boron and Iron

2001 ◽  
Vol 1 (1) ◽  
pp. 47-48
Author(s):  
Khair Mohammad Kakar ◽  
Muhammad Tariq . ◽  
M. Raza Tareen . ◽  
Wasi Ullah .
Keyword(s):  
Triticum Aestivum ◽  
Growth Curve ◽  
Shoot Growth ◽  
Triticum Aestivum L ◽  
Curve Analysis ◽  
Growth Curve Analysis ◽  
Different Levels

scholarly journals Variation of grain growth of wheat cultivars

1970 ◽  
Vol 34 (3) ◽  
pp. 351-359
Author(s):  
SK Adhikary ◽  
MZ Alam ◽  
NK Paul
Keyword(s):  
Triticum Aestivum ◽  
Linear Regression ◽  
Grain Growth ◽  
Growth Pattern ◽  
Correlation Coefficients ◽  
Triticum Aestivum L ◽  
Grain Weight ◽  
Regression Coefficients ◽  
Cultivar Differences ◽  
Wheat Cultivars

An experiment was carried out to study the grain growth pattern of wheat (Triticum aestivum L.) cultivars and to find out association and linear regression of spike weight and grain weight with time. Spike characters indicated that cultivar differences were significant in all the cases with a few exceptions. Linear regression and correlation coefficients revealed that the association between both spike weight and grain weight with time were highly positively significant among the cultivars but their regression coefficients were non- significant. Key Words: Grain growth, correlation, regression, wheat. DOI: 10.3329/bjar.v34i3.3960 Bangladesh J. Agril. Res. 34(3) : 351-359, September 2009

SELECTION FOR YIELD, KERNEL WEIGHT AND PROTEIN CONTENT IN EARLY GENERATIONS OF SIX WHEAT CROSSES

1988 ◽  
Vol 68 (3) ◽  
pp. 641-649 ◽  
Author(s):  
H. GEBRE-MARIAM ◽  
E. N. LARTER ◽  
L. E. EVANS
Keyword(s):  
Triticum Aestivum ◽  
Protein Content ◽  
Selection Index ◽  
Correlation Coefficients ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
High Protein ◽  
Selection Indices ◽  
Different Populations ◽  
Relative Potential

Early generation data consisting of F1 heterosis, F1, F2 and F3 mean performances, parent-offspring regression, and F2–F3 intergeneration correlation were used to identify potentially promising spring wheat (Triticum aestivum L. em Thell) crosses in terms of yield, kernel weight and protein content. The F1 test identified one high-yielding cross out of six showing significant level of higher parent (38%) and mid-parent (70%) heterosis for yield, respectively. The top yielding cross, viz. Glenlea × NB505, in F1 was also the second highest yielding population in F2 and the best yielder in F3 based on two locations. Hence, although F2 single plant productivity measurements misplaced the rankings of some of the crosses, F1 and F3 performances indicated the relative potential of the different populations. Most crosses showed nonsignificant F2–F3 regression and correlation coefficients for yield but significant coefficients for kernel weight. For protein content highly significant F2–F3 regression and correlation coefficients were observed only for crosses involving the high protein parent. The use in F1 of weight-free selection indices involving yield, kernel weight and protein content ranked Glenlea × NB505 as the best of six populations whereas in F3 the same cross had the best aggregate merit when only yield and kernel weight were considered in the index. The inclusion of protein content in the index favored a high protein cross, Sinton × Glenlea.Key words: Wheat, Triticum aestivum, heterosis, parent-offspring regression, intergeneration correlation, selection index

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