Comparison of inoculation methods for selection of plants resistant to Leptosphaeria maculans in Brassica napus

1993 ◽  
Vol 73 (4) ◽  
pp. 1199-1207 ◽  
Author(s):  
W. M. McNabb ◽  
C. G. J. van den Berg ◽  
S. R. Rimmer
Keyword(s):  
Brassica Napus ◽  
Key Words ◽  
Correlation Coefficient ◽  
Leptosphaeria Maculans ◽  
Inoculation Methods ◽  
Inoculation Techniques ◽  
Large Populations ◽  
Disease Rating ◽  
The Relationship ◽  
Selection Of

The relationship between ratings following four inoculation techniques and field ratings and the usefulness of these techniques for screening large populations was determined. Plants of Brassica napus ’Westar,’ ’Wesroona’, ’Topas’, ’Hanna’ and ’R8314’ were inoculated with L. maculans using four techniques: cotyledon inoculation with cotyledon rating, leaf inoculation with leaf and stem rating, stem inoculation with stem rating and inoculation using infested oat kernels with stem rating. Plants from each combination of cultivar and technique were self-pollinated for evaluation of disease rating in the field. The highest precision was obtained with cotyledon rating following cotyledon inoculation. The correlation coefficient between the rating of inoculated plants and the field rating of their progeny ranged from 0.50** for oat kernel inoculation to 0.72** for cotyledon inoculation. Considerable variation for field rating was associated with each rating following artificial inoculation. Selection of resistant plants using low cotyledon reaction was a more efficient technique than leaf or stem inoculation; it was rapid, required less labour and space and correlated well with the field ratings. Key words: Leptosphaeria maculans, Brassica napus, blackleg, oilseed rape, inoculation methods, canola

IMPROVEMENT OF SPRING DURUM WHEAT SELECTION METHODOLOGIES UNDER CLIMATE CHANGE CONDITIONS

1970 ◽  
pp. 33-36
Author(s):  
А. I. Grabovets ◽  
V. P. Kadushkina ◽  
S. А. Kovalenko
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Correlation Coefficient ◽  
Harvest Index ◽  
Unit Area ◽  
Correlation Coefficients ◽  
Chemical Mutagenesis ◽  
Main Method ◽  
The Relationship ◽  
Selection Of

With the growing aridity of the climate on the Don, it became necessary to improve the methodology for conducting the  breeding of spring durum wheat. The main method of obtaining the source material remains intraspecific step hybridization. Crossings were performed between genetically distant forms, differing in origin and required traits and properties. The use of chemical mutagenesis was a productive way to change the heredity of genotypes in terms of drought tolerance. When breeding for productivity, both in dry years of research and in favorable years, the most objective markers were identified — the size of the aerial mass, the mass of grain per plant, spike, and harvest index. The magnitude of the correlation coefficients between the yield per unit area and the elements of its structure is established. It was most closely associated with them in dry years, while in wet years it decreased. Power the correlation of the characteristics of the pair - the grain yield per square meter - the aboveground biomass averaged r = 0.73, and in dry years it was higher (0.91) than in favorable ones (0.61 - 0.70) , between the harvest and the harvest index - r = 0.81 (on average). In dry years, the correlation coefficient increased to 0.92. Research data confirms the greatest importance of the mass of grain from one ear and the plant in the formation of grain yield per unit area in both dry and wet years. In dry years, the correlation coefficient between yield and grain mass per plant was on average r = 0.80; in favorable years, r = 0.69. The relationship between yield and grain mass from the ear was greater — r = 0.84 and r = 0.82, respectively. Consequently, the breeding significance of the aboveground mass and the productivity of the ear, as a criterion for the selection of the crop, especially increases in the dry years. They were basic in the selection.

scholarly journals On the Assessment of Homogeneity in a Uniform Regression Model

2020 ◽  
pp. 115-118
Author(s):  
T.P. Makhaeva ◽  
I.V. Ponomarev
Keyword(s):  
Regression Model ◽  
Correlation Coefficient ◽  
Probabilistic Approach ◽  
Geometric Interpretation ◽  
Functional Dependencies ◽  
Initial Stage ◽  
Correlation Component ◽  
Sample Data ◽  
The Relationship ◽  
Selection Of

When conducting an exploratory analysis of the data and the subsequent construction of functional dependencies between the observed phenomena, it is often necessary to assess the degree of dependence between the studied data. The basis for obtaining such criteria with a probabilistic approach usually includes the correlation component of the sample. The choice of the used indicator directly depends on the methods of studying the sample, as well as the tools for constructing the model. In most cases, at the initial stage of modeling, it is precisely the homogeneity estimates of the sample that are studied, a good selection of which can reduce the complexity of constructing the relationship between the data.In this paper, we study a method for assessing  the uniformity of sample data when constructing a uniform regression model. The first part of the paper describes the correlation coefficient for the L∞ regression, studies the interval of its change, describes the geometric interpretation and the algorithm for constructing this indicator. In the second part of the paper, we study the method of constructing an indicator of "concentration" of the sample. For this, formulas are derived that relate the correlation coefficient to the magnitude of the original sample. In conclusion, a description is given of the algorithms for constructing the considered indicators, and conclusions are drawn about the complexity of these algorithms.

scholarly journals PERANAN SUASANA KERJA TERHADAP KEINGINAN PINDAH KERJA PADA KARYAWAN PT HASNUR JAYA UTAMA

Jurnal Ecopsy ◽  
2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Maya Irka Anggriani ◽  
Hemy Heryati Anward ◽  
Rooswita Santia Dewi
Keyword(s):  
Job Satisfaction ◽  
Correlation Coefficient ◽  
Random Sampling ◽  
Linear Regression Analysis ◽  
Coefficient Of Determination ◽  
Simple Linear Regression ◽  
Close Relationship ◽  
The Relationship ◽  
Selection Of

Penelitian ini bertujuan untuk mengetahui ada tidaknya peranan suasana kerja terhadap keinginan pindah kerja karyawan. Populasi pada penelitian ini yaitu seluruh karyawan PT. Hasnur Jaya Utama. Jenis pengambilan sampel yang dilakukan pada penelitian ini adalah Purposive Random Sampling yaitu pemilihan sampel secara acak sesuai dengan karakteristik yang ditentukan berdasarkan tujuan penelitian yang berjumlah 60 orang.  Sedangkan metode pengumpulan data dengan menggunakan skala suasana kerja, skala kepuasan kerja dan kuesioner keinginan pindah kerja. Dalam penelitian ini analisis data menggunakan analisis regresi linear sederhana. Hasil analisis peranan suasana kerja terhadap kepuasan kerja, diperoleh koefisien korelasi R sebesar 0,759 artinya hubungan suasana kerja dan kepuasan kerja erat. Ditemukan juga koefisien determinasi (R2) yang menunjukkan peranan suasana kerja terhadap kepuasan kerja sebesar 57,5% dan untuk analisis t observasi (8,882) > t tabel (1,672) menunjukkan  ada peranan suasana kerja terhadap kepuasan kerja. Kemudian, hasil analisis peranan kepuasan kerja terhadap keinginan pindah kerja ditemukan koefisien regresi R (0,680) artinya kepuasan kerja dan keinginan pindah kerja memiliki hubungan yang cukup erat. Selanjutnya, diperoleh juga (R2) yang menunjukkan peranan kepuasan kerja terhadap keinginan pindah kerja sebesar 46,3%  dan   untuk  analisis   t   observasi (-7,069) t tabel (1,672) menunjukkan ada peranan kepuasan kerja terhadap keinginan pindah kerja dengan signifikan negatif. Berdasarkan hasil penelitian tersebut maka dapat ditarik kesimpulan bahwa suasana kerja dan kepuasan kerja pada karyawan perlu diperhatikan oleh perusahaan agar dapat meminimalkan keinginan pindah kerja karyawan. Kata Kunci: Suasana kerja, kepuasan kerja, keinginan pindah kerjaThis study purposed to determine whether there is the influence of the working atmosphere to intention turnover on employees. The population in this study are all employees of PT. Hasnur Jaya Utama. Type of sampling conducted in this study is Purposive Random Sampling is the selection of a random sample according to the characteristics that are determined based on the research goals of 60 people. The methods of data collection by using the scale of the working atmosphere, the scale of job satisfaction and intention turnover questionnaire. In this study analyzes the data using simple linear regression analysis. The results of the analysis of the influence of working atmosphere to job satisfaction, the correlation coefficient R of 0.759 means that the relationship working atmosphere and job satisfaction is quite close. Also found the coefficient of determination (R2) which indicates the role of working conditions on job satisfaction at 57.5% and for the analysis of observation (8.882) > t table (1.672) which indicates means that the influence of the atmosphere to job satisfaction. Then, the results of the analysis of the influence of job satisfaction to intention turnover a correlation coefficient R (0.680) means that job satisfaction and intention turnover to have a close relationship. Furthermore, also obtained (R2 ) which indicates the role of job satisfaction to intention turnover of 46,3% and for the analysis of t observation (-7.069) > t table (1.672) which indicates means that the influence of job satisfaction to intention turnover with a significant negative . Based on these results it can be concluded that the working atmosphere and job satisfaction in employees need to be considered by the company in order to minimize intention turnover ob the employees. Keywords: The working atmosphere, job satisfaction, intention turnover.

scholarly journals Hormonal Responses to Susceptible, Intermediate, and Resistant Interactions in the Brassica napus–Leptosphaeria maculans Pathosystem

2021 ◽  
Vol 22 (9) ◽  
pp. 4714
Author(s):  
Cunchun Yang ◽  
W. G. Dilantha Fernando
Keyword(s):  
Brassica Napus ◽  
Plant Defense ◽  
Fungal Pathogen ◽  
Durable Resistance ◽  
Leptosphaeria Maculans ◽  
Hormone Signaling ◽  
Hormonal Responses ◽  
Microbe Interactions ◽  
Quantitative Analyses ◽  
The Relationship

Hormone signaling plays a pivotal role in plant–microbe interactions. There are three major phytohormones in plant defense: salicylic acid (SA), jasmonic acid (JA), and ethylene (ET). The activation and trade-off of signaling between these three hormones likely determines the strength of plant defense in response to pathogens. Here, we describe the allocation of hormonal signaling in Brassica napus against the fungal pathogen Leptosphaeria maculans. Three B. napus genotypes (Westar, Surpass400, and 01-23-2-1) were inoculated with two L. maculans isolates (H75 8-1 and H77 7-2), subsequently exhibiting three levels of resistance: susceptible, intermediate, and resistant. Quantitative analyses suggest that the early activation of some SA-responsive genes, including WRKY70 and NPR1, contribute to an effective defense against L. maculans. The co-expression among factors responding to SA/ET/JA was also observed in the late stage of infection. The results of conjugated SA measurement also support that early SA activation plays a crucial role in durable resistance. Our results demonstrate the relationship between the onset patterns of certain hormone regulators and the effectiveness of the defense of B. napus against L. maculans.

Sentence Intelligibility as a Function of Key Word Selection

1974 ◽  
Vol 17 (4) ◽  
pp. 631-637 ◽  
Author(s):  
Joseph R. Duffy ◽  
Thomas G. Giolas
Keyword(s):  
Key Words ◽  
Careful Selection ◽  
Key Word ◽  
Low Pass ◽  
Sentence Intelligibility ◽  
Word Predictability ◽  
Word Selection ◽  
The Relationship ◽  
Selection Of

The purpose of this study was to investigate the relationship between word predictability and sentence intelligibility. This relationship was examined by comparing intelligibility scores obtained with frequency-filtered sentences (CID Sentence Lists B and D and Revised List C) which were scored using key words empirically determined to be representative of three different degrees of predictability. We hypothesized that the scores obtained would be a function of the predictability status of the key words used in scoring. Results indicated significant differences between the three scoring procedures for each sentence list under two filtering conditions (420-Hz and 360-Hz low pass) and these differences were in the hypothesized direction. The results suggest that use of “easy-to-predict” words for scoring purposes will increase sentence intelligibility scores, while use of “difficult-to-predict” words will depress scores. We concluded that word predictability is a factor influencing sentence intelligibility and that careful selection of key words, based on their predictability status, is a method of controlling or influencing the intelligibility of sentences.

scholarly journals Kaedah Pengukuran Indek Kebolehsenggaraan Produk atau Sistem Berdasarkan Kriteria Pemasangan

2012 ◽  
Author(s):  
Ahmad Baharuddin Abdullah ◽  
Zaidi Mohd. Ripin
Keyword(s):  
Key Words ◽  
Critical Path ◽  
Life Time ◽  
Physical Structure ◽  
Product Performance ◽  
Water Pump ◽  
The Relationship ◽  
Selection Of

Kertas kerja ini membincangkan perhubungan antara penyelenggaraan dan pemilihan pengikat bagi meningkatkan prestasi sesuatu produk dari segi jangka hayat dan struktur fizikal. Di dalam kertas kerja ini, indek kebolehsenggaraan diukur berdasarkan digraf peleraian yang dinilai bergantung kepada jenis pengikat yang digunakan dan kriteria pemasangan. Laluan kritikal digunakan untuk mewakili laluan terpendek untuk mencapai komponen atau bahagian yang dikehendaki untuk kerja penyelenggaraan. Selain itu kekerapan penyelenggaraan sesuatu komponen atau bahagian turut diambil kira. Untuk itu satu kajian kes mengenai sistem pam akan dijalankan. Hasil kajian menunjukkan bahawa melalui penukaran jenis sambungan, indek kebolehsenggaraan dapat ditingkatkan dengan banyak. Kata kunci: Jenis sambungan, digraf pemasangan, indek penyelenggaraa This paper discusses the relationship between maintenance and the selection of fastener in order to enhance product performance in terms of life time and physical structure. In this study, maintainability index was measured using a disassembly digraph, which was evaluated due to the fastener used and the assembly criteria. The critical path was used to represent the shortest and simplest way to achieve the targeted component or part. Additionally, the rate of maintenance was also taken into consideration. To clarify the method developed, a case study of water pump was carried out. Result indicates that by changing the type of fastener, maintainability index can be increased tremendously. Key words: Assembly type, assembly digraph, maintainability index

Establishing the relationship of ascospore loads with blackleg (Leptosphaeria maculans) severity on canola (Brassica napus)

2004 ◽  
Vol 55 (8) ◽  
pp. 849 ◽  
Author(s):  
A. D. Wherrett ◽  
K. Sivasithamparam ◽  
M. J. Barbetti
Keyword(s):  
Brassica Napus ◽  
Crop Residues ◽  
Leptosphaeria Maculans ◽  
Disease Index ◽  
Adult Plant ◽  
Exponential Relationship ◽  
Glufosinate Ammonium ◽  
Highly Correlated ◽  
Relationship Of ◽  
The Relationship

A study was carried out to determine the relationship of blackleg (Leptosphaeria maculans) to ascospore loads from infested canola residue, and also to determine whether effects of chemicals on L. maculans development and ascospore discharge from residues would be reflected in subsequent disease on a freshly sown crop. Residues were dipped in a water-only control or solutions of flutriafol or glufosinate-ammonium and placed in the field prior to early winter rains where they remained through the growing season. Canola (Brassica napus cv. Dunkeld) was seeded adjacent to residues. Early seedling lesion and adult plant crown canker development were monitored. A significant exponential relationship between numbers of ascospores discharged from residues and seedling percentage disease index (SPDI; range 0–100%) and adult plant percentage disease index (APDI; range 0–100%) was evident. In particular, large variations in SPDI and APDI were evident in relation to changes in level of inoculum where less than 25 × 105 ascospores/stem (approx.) were discharged. A reduction in ascospore numbers discharged from 25 × 105 ascospores/stem to 5 × 105 ascospores/stem resulted in a significant reduction of SPDI and APDI. Above this ascospore/stem threshold, responses to inoculum increases were minimal, with relatively little further increase in SPDI or APDI. Our study established, for the first time, a clear response of disease severity to numbers of ascospores discharged. SPDI was lower in plots containing flutriafol- or glufosinate-ammonium-treated residues compared with water-only control plots. Nearly all seedlings remained symptom-free in flutriafol-treated plots compared with only 20% in the water-only control plots. Crown canker measurement on adult plants indicated significantly lower APDI in plots containing flutriafol- or glufosinate-ammonium-treated residues compared with the untreated control plots. SPDI was highly correlated to APDI.

scholarly journals Organizational Commitment Ditinjau dari Psychological Ownership pada Karyawan PT Capella Dinamik Nusantara Medan

PSYCHE 165 ◽  
2020 ◽  
pp. 88-94
Author(s):  
Jovian Julius Julius ◽  
Diny Atrizka ◽  
Rianda Elvinawanty
Keyword(s):  
Organizational Commitment ◽  
Correlation Coefficient ◽  
Significant Relationship ◽  
Sampling Method ◽  
Employee Commitment ◽  
Psychological Ownership ◽  
Purposive Sampling ◽  
Permanent Employees ◽  
The Relationship ◽  
Selection Of

The purpose of this study is to find out about the relationship between organizational commitment and psychological ownership. The hypothesis that the researchers propose in this study is that there is a positive and significant relationship between organizational commitment and psychological ownership, assuming that the higher the organizational commitment, the higher the psychological ownership and conversely. The selection of participants for this study used a sampling method, namely purposive sampling. The sample of this research is 141 employees who are permanent employees who have more than 1 year of service at PT. Capella Dinamik Nusantara Medan. Data collected by researchers, comes from the collection results with a scale that has been prepared with reference to the theoretical dimensions used by researchers to measure organizational commitment and psychological ownership. The correlation coefficient obtained was 0.613 (p <0.05). These results indicate that there is a positive and significant relationship between organizational commitment and psychological ownership. The results of this study contribute to the Industrial & Organizational Psychology sector in particular to increase employee commitment.

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