scholarly journals READINESS FORMATION OF THE INSTRUMENTALISTS’ CONCERT PROGRAM FOR PUBLIC VARIETY PERFORMANCE

2021 ◽  
Vol 1 (33) ◽  
pp. 100-103
Author(s):  
T.A. Radzivil
Keyword(s):  
Variety Performance

scholarly journals Optimal models in the yield analysis of new flax cultivars

2018 ◽  
Vol 98 (4) ◽  
pp. 897-907
Author(s):  
Gaofeng Jia ◽  
Helen M. Booker
Keyword(s):  
Mixed Models ◽  
Statistical Power ◽  
Mixed Model ◽  
Trial Data ◽  
Residual Error ◽  
Yield Data ◽  
Symmetry Model ◽  
Compound Symmetry ◽  
Future Data ◽  
Variety Performance

Multi-environment trials are conducted to evaluate the performance of cultivars. In a combined analysis, the mixed model is superior to an analysis of variance for evaluating and comparing cultivars and dealing with an unbalanced data structure. This study seeks to identify the optimal models using the Saskatchewan Variety Performance Group post-registration regional trial data for flax. Yield data were collected for 15 entries in post-registration tests conducted in Saskatchewan from 2007 to 2016 (except 2011) and 16 mixed models with homogeneous or heterogeneous residual errors were compared. A compound symmetry model with heterogeneous residual error (CSR) had the best fit, with a normal distribution of residuals and a mean of zero fitted to the trial data for each year. The compound symmetry model with homogeneous residual error (CS) and a model extending the CSR to higher dimensions (DIAGR) were the next best models in most cases. Five hundred random samples from a two-stage sampling method were produced to determine the optimal models suitable for various environments. The CSR model was superior to other models for 396 out of 500 samples (79.2%). The top three models, CSR, CS, and DIAGR, had higher statistical power and could be used to access the yield stability of the new flax cultivars. Optimal mixed models are recommended for future data analysis of new flax cultivars in regional tests.

ESTIMATING SOYBEAN MODEL GENETIC COEFFICIENTS FROM PRIVATE–SECTOR VARIETY PERFORMANCE TRIAL DATA

2002 ◽  
Vol 45 (4) ◽  
Author(s):  
S. M. Welch ◽  
G. Wilkerson ◽  
K. Whiting ◽  
N. Sun ◽  
T. Vagts ◽  
...  
Keyword(s):  
Private Sector ◽  
Trial Data ◽  
Variety Performance ◽  
Performance Trial

Religious classical practice: Entextualisation and performance

2013 ◽  
Vol 42 (3) ◽  
pp. 307-330 ◽  
Author(s):  
Andrey Rosowsky
Keyword(s):  
Communicative Practices ◽  
Linguistic Resources ◽  
Introductory Overview ◽  
Theatrical Performance ◽  
Variety Performance ◽  
And Performance ◽  
Interpretive Frame ◽  
Classical Language ◽  
The Uk ◽  
Theoretical Considerations

AbstractThis article considers a particular contextualisation of the religious classical and practices associated with it within broader sets of linguistic resources or repertoires. Through a description and analysis of religious classical practices occurring in multilingual urban settings in the UK, the article employs the interpretive frame of performance to account for practice. An introductory overview of religious classical practices is provided, which is followed by a brief discussion of the theoretical considerations surrounding performance and entextualisation. This is followed by the sharing of ethnographic data that aim to demonstrate the performance-oriented and highly entextualised nature of religious classical practice. The article concludes with the suggestion that the latter is an example not only of a set of linguistic resources used predominantly for performative practice but has more in common with scripted theatrical performance than with other conventionally referential communicative practices. (Religious classical, language variety, performance, entextualisation, linguistic resources, linguistic repertoire, Muslim, multilingualism, practice)*

scholarly journals Is Vegetable Variety Evaluation and Reporting Becoming A Lost Art? An Industry Perspective

2002 ◽  
Vol 12 (4) ◽  
pp. 553-559 ◽  
Author(s):  
Tom V. Williams ◽  
Warren Roberts
Keyword(s):  
Additional Data ◽  
Citrullus Lanatus ◽  
Standard Format ◽  
Seed Industry ◽  
New Varieties ◽  
Regional Basis ◽  
Production Practices ◽  
The Difference ◽  
Variety Performance ◽  
Variety Testing

Is there a more important component to a grower's production practices than the choice of the best variety to plant? Probably not, yet there is less public vegetable variety testing than ever before, despite the increasing introduction of new varieties by the seed industry. This article examines the reasons for fewer vegetable variety trials, discusses the benefits of good variety reporting, and considers the keys to conducting a successful vegetable variety trial. Vegetable variety performance could be interpreted best on a regional basis if a standard format for evaluating each species is developed. One such attempt at standardizing watermelon (Citrullus lanatus) evaluation is presented. Finally, several recent vegetable trial reports are discussed to point out the difference of each and what additional data could have been provided.

scholarly journals Crop variety management for climate adaptation supported by citizen science

2019 ◽  
Vol 116 (10) ◽  
pp. 4194-4199 ◽  
Author(s):  
Jacob van Etten ◽  
Kauê de Sousa ◽  
Amílcar Aguilar ◽  
Mirna Barrios ◽  
Allan Coto ◽  
...  
Keyword(s):  
Citizen Science ◽  
Climate Adaptation ◽  
Adaptation To Climate Change ◽  
Geographic Space ◽  
Growing Seasons ◽  
Specific Effects ◽  
Climate Forecasts ◽  
Climatic Responses ◽  
Variety Performance ◽  
Crop Variety

Crop adaptation to climate change requires accelerated crop variety introduction accompanied by recommendations to help farmers match the best variety with their field contexts. Existing approaches to generate these recommendations lack scalability and predictivity in marginal production environments. We tested if crowdsourced citizen science can address this challenge, producing empirical data across geographic space that, in aggregate, can characterize varietal climatic responses. We present the results of 12,409 farmer-managed experimental plots of common bean (Phaseolus vulgarisL.) in Nicaragua, durum wheat (Triticum durumDesf.) in Ethiopia, and bread wheat (Triticum aestivumL.) in India. Farmers collaborated as citizen scientists, each ranking the performance of three varieties randomly assigned from a larger set. We show that the approach can register known specific effects of climate variation on varietal performance. The prediction of variety performance from seasonal climatic variables was generalizable across growing seasons. We show that these analyses can improve variety recommendations in four aspects: reduction of climate bias, incorporation of seasonal climate forecasts, risk analysis, and geographic extrapolation. Variety recommendations derived from the citizen science trials led to important differences with previous recommendations.

scholarly journals Occurrence of Viruses and Associated Grain Yields of Paired Symptomatic and Nonsymptomatic Tillers in Kansas Winter Wheat Fields

2016 ◽  
Vol 106 (2) ◽  
pp. 202-210 ◽  
Author(s):  
Dorith Rotenberg ◽  
William W. Bockus ◽  
Anna E. Whitfield ◽  
Kaylee Hervey ◽  
Kara D. Baker ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Mosaic Virus ◽  
The State ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Grain Yields ◽  
Yellow Dwarf Virus ◽  
Variety Performance ◽  
Performance Trial

Vector-borne virus diseases of wheat are recurrent in nature and pose significant threats to crop production worldwide. In the spring of 2011 and 2012, a state-wide sampling survey of multiple commercial field sites and university-managed Kansas Agricultural Experiment Station variety performance trial locations spanning all nine crop-reporting regions of the state was conducted to determine the occurrence of Barley yellow dwarf virus-PAV (BYDV-PAV), Cereal yellow dwarf virus-RPV, Wheat streak mosaic virus (WSMV), High plains virus, Soilborne wheat mosaic virus, and Wheat spindle streak mosaic virus using enzyme-linked immunosorbent assays (ELISA). As a means of directly coupling tiller infection status with tiller grain yield, multiple pairs of symptomatic and nonsymptomatic plants were selected and individual tillers were tagged for virus species and grain yield determination at the variety performance trial locations. BYDV-PAV and WSMV were the two most prevalent species across the state, often co-occurring within location. Of those BYDV-PAV- or WSMV-positive tillers, 22% and 19%, respectively, were nonsymptomatic, a finding that underscores the importance of sampling criteria to more accurately assess virus occurrence in winter wheat fields. Symptomatic tillers that tested positive for BYDV-PAV produced significantly lower grain yields compared with ELISA-negative tillers in both seasons, as did WSMV-positive tillers in 2012. Nonsymptomatic tillers that tested positive for either of the two viruses in 2011 produced significantly lower grain yields than tillers from nonsymptomatic, ELISA-negative plants, an indication that these tillers were physiologically compromised in the absence of virus-associated symptoms. Overall, the virus survey and tagged paired-tiller sampling strategy revealed effects of virus infection on grain yield of individual tillers of plants grown under field conditions and may provide a complementary approach toward future estimates of the impact of virus incidence on crop health in Kansas.

Genetic base-broadening of cacao for precocity and cropping efficiency

2016 ◽  
Vol 15 (6) ◽  
pp. 548-557 ◽  
Author(s):  
Francis Kwame Padi ◽  
Atta Ofori ◽  
Abraham Akpertey
Keyword(s):  
West Africa ◽  
Improvement Strategy ◽  
Cross Sectional ◽  
Genetic Groups ◽  
Genetic Base ◽  
Productivity Increase ◽  
Base Broadening ◽  
Bean Yield ◽  
Variety Performance ◽  
Genetic Base Broadening

AbstractIntroduction of clones from genetic groups that are underrepresented in the pedigree of commercial cacao varieties in West Africa represents an important aspect of cacao improvement strategy of broadening the genetic base to overcome current yield stagnation of the crop. The objective of the present study was to determine the combining abilities of more recently introduced cacao clones for yield and cropping efficiency in the early bearing years. Seven recently introduced clones were crossed as males to five clones commonly used in the seed gardens in Ghana using a North Carolina II design. The 35 F1 varieties and one commercial variety were evaluated in the field from June 2010 to March 2015 for four traits: increase in trunk cross-sectional area in the juvenile, and in the pod-bearing phases, bean yield and cropping efficiency. Though both GCA and SCA variances were significant for all traits, the ratios of GCA:SCA were much smaller than unity, indicating the importance of non-additive effects in the control of the traits. Among the set of clones therefore, prediction of F1 variety performance cannot be based on the GCA or per se (average) performance of the clones. Six varieties were more precocious, and eight had higher cropping efficiencies than the standard variety. Bean yields ranged from 0.74 to 1.05 t/ha/year in the fourth and fifth years after planting among the top six varieties. The study provides evidence of the large potential for productivity increase through the use of cacao clones beyond Pound's early introductions into West Africa.

Wheatgrass Variety Performance on Summer Rangeland in Northeastern California

1961 ◽  
Vol 53 (5) ◽  
pp. 328-331
Author(s):  
Donald R. Cornelius ◽  
Duncan E. Williams
Keyword(s):  
Variety Performance

Performance of lucerne genotypes for biomass production and nitrogen content differs in monoculture and in mixture with grasses and is partly predicted from traits recorded on isolated plants

2017 ◽  
Vol 68 (11) ◽  
pp. 942 ◽  
Author(s):  
Amel Maamouri ◽  
Gaëtan Louarn ◽  
Vincent Béguier ◽  
Bernadette Julier
Keyword(s):  
Growth Habit ◽  
Plant Biomass ◽  
Leaf Size ◽  
Matter Content ◽  
Dry Matter Content ◽  
Competition Intensity ◽  
Shoot Height ◽  
Shoot Number ◽  
Biomass Components ◽  
Variety Performance

Grass–legume mixtures are key crops to improve agricultural sustainability. Despite their significant use in mixture, lucerne (Medicago sativa L.) varieties are mostly tested and bred for monocultures. This study was performed to evaluate whether the ranking of lucerne genotypes for biomass components and quality was similar in monoculture and mixture, and whether traits recorded on isolated plants could help to predict performance in monoculture and mixture. For 46 genotypes planted in the three competition conditions, plant biomass, shoot height, shoot number and protein content were recorded. In addition, maximum leaf size, internode length, stem diameter, growth habit, specific leaf area and leaf dry-matter content were measured on isolated plants. A general positive correlation was observed between the performance of genotypes in monoculture and in mixture. However, significant changes in genotype ranking indicated that the species of its neighbours could modify the relative performance of a genotype. The traits that minimised competition intensity also changed according to the neighbour species. In mixture, competition intensity was highest for plants with long internodes, a high shoot number and a non-erect growth habit. In monoculture, plants with long internodes and larges leaves suffered less from competition. The agronomic performance of lucerne varieties differing in their architecture should be compared in monoculture and mixture to finally identify the traits to be phenotyped to improve lucerne variety performance in both cultivation modes.

Sign in / Sign up

Export Citation Format

Share Document