scholarly journals SELECTION OF GENETICALLY MARKED CORN LINES FOR ABILITY TO PARTHENOGENESIS

2021 ◽  
Author(s):  
S.А. Apanasova ◽  
◽  
N.V. Apanasova ◽  
Keyword(s):  
Reproductive Biology ◽  
Laboratory Conditions ◽  
Corn Breeding ◽  
Spontaneous Frequency ◽  
Task Oriented ◽  
Field And Laboratory Conditions ◽  
Selection Of ◽  
And Task

Haploids are the value initial materials in corn breeding. However, spontaneous frequency of their appearance is about 0.01%. Due to selection and task-oriented breeding, researchers of the Genetic Department and the Department of Genetic and Reproductive Biology of the Saratov StateUniversity obtained homozygotic lines predisposed to parthenogenesis, autonomous endospermogenesis, androgenesis, polyembriony: АТ-1; АТ-3 (АТ – Apomictic Tyrnova); АPО-3 (line obtained from matriclinous haploid of a line АТ-3). We developed new genetically marked corn lines АТТМ using lines АТ-1 and ТM. Estimation of haploidy frequency was conducted in the field and laboratory conditions. There were conducted caryological and cytoembryologic analyses of the newly developed lines.

scholarly journals Distortion Effects in Equal Area Unit Maps

2021 ◽  
Author(s):  
Jochen Schiewe
Keyword(s):  
Hot Spots ◽  
Extreme Values ◽  
Generation Process ◽  
Equal Area ◽  
Topological Relationships ◽  
Area Unit ◽  
Task Oriented ◽  
Local Topology ◽  
Selection Of ◽  
Local Extreme

AbstractMaps that correctly represent the geographic size and shape of regions, taking into account scaling and generalization, have the disadvantage that small regions can easily be overlooked or not seen at all. Hence, for some map use tasks where small regions are of importance, alternative map types are needed. One option is the so-called equal area unit maps (EAUMs), where every enumeration unit has the same area size, possibly also the same basic shape such as squares or hexagons. The geometrical distortion of EAUMs, however, leads to a more difficult search for regions as well as a falsification of topological relationships and spatial patterns. To describe these distortions, a set of analytical measures is proposed. But it turns out that the expressiveness of these measures is rather limited. To better understand and to model the influence of distortions, two user studies were conducted. The study on the search in EAUMs (also with the aim of reconstruct the search strategies of the users) revealed how important it is to consider the local topology (e.g. corner or border positions of regions) during the generation process. With regard to pattern identification, it could be shown that EAUMs significantly increase the detection rate of local extreme values. On the other hand, global lateral gradients or geostatistical hot spots often get blurred or even lost. As a consequence, a task-oriented selection of map types and further developments are recommended.

Architecture for Decision-Making and Task-Oriented Reasoning for the Web of Trust

2009 ◽  
Author(s):  
Stanislav Ustymenko ◽  
Daniel G. Schwartz ◽  
George Maroulis ◽  
Theodore E. Simos
Keyword(s):  
Decision Making ◽  
Web Of Trust ◽  
Task Oriented ◽  
The Web ◽  
And Task

Heavy metal depuration in flat tree oystersisognomon alatusunder field and laboratory conditions

2004 ◽  
Vol 86 (3) ◽  
pp. 171-179 ◽  
Author(s):  
Katayon Saed ◽  
Ahmad Ismail ◽  
Hishamuddin Omar ◽  
Misri Kusnan
Keyword(s):  
Heavy Metal ◽  
Laboratory Conditions ◽  
Field And Laboratory Conditions

scholarly journals The Impact of Relationship-Oriented and Task-Oriented Management Styles on Organizational Climate in Tehran's High Schools

2016 ◽  
Vol 6 (3) ◽  
Author(s):  
Zahra Gholami
Keyword(s):  
High Schools ◽  
Data Collection ◽  
Organizational Climate ◽  
Management Style ◽  
Equation Modeling ◽  
Management Styles ◽  
Statistical Population ◽  
Task Oriented ◽  
The Impact ◽  
And Task

<p>The present study was aimed to examine the effect of relationship-oriented and task-oriented management styles on organizational atmosphere in Tehran's high schools in 2016. Research method was practical in terms of objective; and it was survey-descriptive in terms of data collection. The statistical population consisted of all high school managers in Tehran, from which 322 individuals were selected as sample size, using Cochran Formula and Stratified Cluster Sampling Method. Data collection was done based on Halpin and Croft's Organizational Climate questionnaire, and Bardtz and Matenkas's management Style questionnaire. After collecting the questionnaires, data were examined and analyzed using Structural Equation Modeling method and Smart PLS software in two sections: 1) measurement model and 2) structural section. In the first section, technical features of the questionnaires included reliability, convergent validity, divergent validity, which were examined through PLS. In the second section, the software's significance coefficients were used for examining research hypotheses. Finally, findings approved of the effect of relationship-oriented and task-oriented management styles on organizational climate in Tehran's high schools. </p>

scholarly journals Electrical conductivity of the seed soaking solution and soybean seedling emergence

2004 ◽  
Vol 61 (2) ◽  
pp. 164-168 ◽  
Author(s):  
Roberval Daiton Vieira ◽  
Angelo Scappa Neto ◽  
Sonia Regina Mudrovitsch de Bittencourt ◽  
Maristela Panobianco
Keyword(s):  
Electrical Conductivity ◽  
Water Content ◽  
Seedling Emergence ◽  
Soybean Seed ◽  
Accelerated Aging ◽  
Seed Vigor ◽  
Soybean Seedling ◽  
Seed Soaking ◽  
Laboratory Conditions ◽  
Field And Laboratory Conditions

Vigor of soybean [Glycine max (L.) Merrill] seeds can be evaluated by measuring the electrical conductivity (EC) of the seed soaking solution, which has shown a satisfactory relationship with field seedling emergence, but has not had aproper definition of range yet. This work studies the relationship between EC and soybean seedling emergence both in the field and laboratory conditions, using twenty two seed lots. Seed water content, standard germination and vigor (EC, accelerated aging and cold tests) were evaluated under laboratory conditions using -0.03; -0.20; -0.40 and -0.60 MPa matric potentials, and field seedling emergence was also observed. There was direct relationship between EC and field seedling emergence (FE). Under laboratory conditions, a decreasing relationship was found between EC and FE as water content in the substrate decreased. Relationships between these two parameters were also found when -0.03; -0.20 and -0.40 MPa matric potentials were used. EC tests can be used successfully to evaluate soybean seed vigor and identify lots with higher or lower field emergence potential.

scholarly journals Selección para calidad fisiológica de la semilla y rendimiento en líneas S2 derivadas de cuatro poblaciones tropicales de maíz (Zea mays L.)

2016 ◽  
Vol 7 (1) ◽  
pp. 58
Author(s):  
Enrique Navarro ◽  
Cristina Vega ◽  
Fernando Narváez ◽  
Hugo Córdova
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Recurrent Selection ◽  
Zea Mays L ◽  
Agronomic Traits ◽  
Reciprocal Recurrent Selection ◽  
Laboratory Conditions ◽  
Flower Plant ◽  
Ear Height ◽  
Field And Laboratory Conditions

This study was carried out in 1993 to evaluate S2 lines from four maize tropical populations improved by reciprocal recurrent selection. These lines were evaluated under field and laboratory conditions, the latter one to determine physiology quality. The main goal was to measure genetic variability within and among populations for traits such as grain yield, vigor and germination and to select the best lines under field and laboratory conditions. The combined analysis of variance showed great genetic variability among the S2 lines within and among populations for grain yield, days to flower, plant and ear height, among others. The maximum genetic variability was observed on the lines from population 43 and pool 23 for most of the traits, although the latter showed a greater genetic variability for grain yield. Besides, it is important to mention that the above populations included the best genotypes for grain yield, germination and vigor. Taking into account the above mentionel agronomic traits, fifteen lines were selected; 2 belong to population 43* pool 20, 2 from pool 19* pool 23, 8 from population 43, and 3 from pool 23. These results confirm the genetic superiority of the lines from populations 43 and pool 23, so that these populations should be recommended for future genetic improvement by reciprocal recurrent procedures.

scholarly journals An Innovative Optimization Design Procedure for Mechatronic Systems with a Multi-Criteria Formulation

2021 ◽  
Vol 11 (19) ◽  
pp. 8900
Author(s):  
Cuauhtémoc Morales-Cruz ◽  
Marco Ceccarelli ◽  
Edgar Alfredo Portilla-Flores
Keyword(s):  
Optimization Design ◽  
Optimization Problem ◽  
Heuristic Algorithms ◽  
Design Procedure ◽  
Concurrent Design ◽  
Mechatronic Systems ◽  
Design Variables ◽  
One Step ◽  
Task Oriented ◽  
And Task

This paper presents an innovative Mechatronic Concurrent Design procedure to address multidisciplinary issues in Mechatronics systems that can concurrently include traditional and new aspects. This approach considers multiple criteria and design variables such as mechanical aspects, control issues, and task-oriented features to formulate a concurrent design optimization problem that is solved using but not limited to heuristic algorithms. Furthermore, as an innovation, this procedure address all considered aspects in one step instead of multiple sequential stages. Finally, this work discusses an example referring to Mechatronic Design to show the procedure performed and the results show its capability.

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