scholarly journals Parametric and non-parametric indexes applied in the selection of sour passion fruit progenies

2018 ◽  
Vol 40 (1) ◽  
Author(s):  
Edinéia Zulian Dalbosco ◽  
Willian Krause ◽  
Leonarda Grillo Neves ◽  
Dejânia Vieira de Araújo ◽  
Kemely Mara Ramalho Hiega ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Passion Fruit ◽  
Pulp Yield ◽  
Economic Weights ◽  
Selection Indices ◽  
Selection Indexes ◽  
Genetic Standard Deviation ◽  
Selection Of ◽  
Sour Passion Fruit ◽  
Non Parametric

Abstract Several traits must be observed in the selection of sour passion fruit progenies. For such, selection indices could be used for gradually increasing the frequency of favorable genotypes for the set of the traits of interest. This study aimed to compare parametric and non-parametric selection indices to be used in the selection of passion fruit progenies and identify the best economic weights. Thus, 118 full-sib families and three controls were assessed for days regarding flowering, productivity in kg ha-1 year, fruit mass in g, number of fruits, average length of fruits in mm, average fruit diameter in mm, fruit shape, average shell thickness in mm, pulp yield, pulp color, total soluble solids, titratable acidity and SS/ATT ratio. The non-parametric selection indexes used to obtain genetic gains were Mulamba and Mock, genotype-ideotype distance, multiplicative and Elston. Smith and Hazel, Williams and Pesek and Baker parametric indexes were used, with different economic weights attributed. The Mulamba and Mock, genotype-ideotype distance nonparametric selection indexes and the Williams parametric index showed satisfactory and balanced gains. The genetic variation coefficient, genetic standard deviation and random weight economic weights provided higher gains for non-parametric selection indexes. Similar gains were obtained for parametric indexes, regardless of assigned weight, except for Pesek and Baker, whose genetic standard deviation provided the highest gain.

scholarly journals Economic weights for conformation traits in Mountain sheep

2006 ◽  
Vol 49 (6) ◽  
pp. 575-582
Author(s):  
B. Fuerst-Waltl ◽  
R. Baumung
Keyword(s):  
Standard Deviation ◽  
Least Squares ◽  
Fixed Effects ◽  
Sheep Breeding ◽  
Breeding Stock ◽  
Economic Weights ◽  
Auction Price ◽  
Price Effects ◽  
Genetic Standard Deviation

Abstract. Between October 2004 and April 2005, data of 304 and 504 Mountain sheep rams and ewes, respectively, were collected at seven auction sales for sheep breeding stock. Conformation scores of all animals were assessed before the auction started. In Mountain sheep, the scores 1 (worst) to 9 (best) are assigned for the conformation traits type, frame, form, feet and legs and wool. For the analysis of auction price, effects accounted for were the fixed effects of conformation traits, auction and lamb(s) sold with ewe (ewes only) as well as the covariate success at exhibitions. Auction had a significant effect on price in rams (P<0.05) and ewes (P<0.001), while for exhibition success only a trend (P<0.10) could be observed in ewes. Ewes sold with lambs did not achieve significantly higher prices. Within conformation traits, only type was found to have a significant effect in both sexes (P<0.01 in rams and P<0.001 in ewes). In rams, frame had a significant effect on auction price (P<0.001) while only a trend could be observed for form and feet and legs (P<0.10). Contrary to these results, in ewes higher scores for form and wool led to significantly higher prices (P<0.05 and <0.001, respectively). By means of the obtained Least Squares Means for score classes, economic weights for conformation traits were derived. The economic weights per genetic standard deviation, ewe place and year range from approximately € 0.9 to € 4.9 in ewes and € 1.3 to € 4.8 in rams.

scholarly journals Prediction of genetic gains by selection indexes and REML/BLUP methodology in a population of sour passion fruit under recurrent selection

2017 ◽  
Vol 39 (2) ◽  
pp. 183 ◽  
Author(s):  
Fernando Higino de Lima e Silva ◽  
Alexandre Pio Viana ◽  
Jôsie Cloviane De Oliveira Freitas ◽  
Eileen Azevedo Santos ◽  
Daniele Lima Rodrigues ◽  
...  
Keyword(s):  
Recurrent Selection ◽  
Block Design ◽  
Total Yield ◽  
Passion Fruit ◽  
Soluble Solids ◽  
Transverse Diameter ◽  
Genetic Gains ◽  
Breeding Programmes ◽  
Selection Indexes ◽  
Selection Of

Breeding programmes must be improved to accelerate the development of new cultivars due to the commercial importance of passion fruit. This study compared four selection indexes and the REML/BLUP methodology in an assessment of predicted genetic gains in the traits of interest. A total of 81 full-sib progenies derived from the third cycle of recurrent selection were assessed for one harvest in one environment. The experiment was arranged in a randomized complete block design with five plants per plot. The following traits were assessed: number of fruits, total yield, fruit mass, fruit longitudinal diameter, fruit transverse diameter, fruit pulp percentage, shell thickness and content of soluble solids. The Mulamba & Mock index produced the best results for the selection of progenies. The REML/BLUP method was the most efficient and selected progenies with predicted genetic gains better than the selection indexes tested. 

scholarly journals Selection indexes in the simultaneous increment of yield components in topcross hybrids of green maize

2020 ◽  
Vol 55 ◽  
Author(s):  
Willame dos Santos Candido ◽  
Caique Machado e Silva ◽  
Maraiza Lima Costa ◽  
Bruna Elaine de Almeida Silva ◽  
Beatriz Lima de Miranda ◽  
...  
Keyword(s):  
Yield Components ◽  
Block Design ◽  
Yield Traits ◽  
Genetic Gains ◽  
Economic Weights ◽  
Randomized Complete Block Design ◽  
Selection Indexes ◽  
Best Fit ◽  
Topcross Hybrids ◽  
Selection Of

Abstract: The objective of this work was to define the most suitable selective strategy for the simultaneous increment of yield components of green maize, by comparing three selection indexes weighted by economic weights and by the REML/BLUP method, in the assessment of predicted genetic gains for traits of interest. An experiment with 75 topcross hybrids from partially inbred S1 lines of green maize was carried out in Jataí, in the state of Goiás, Brazil, using a randomized complete block design, with four replicates. The following yield traits were evaluated: straw ears and commercial ears, grain mass, ear length, ear diameter, and number of ear rows. The selection indexes of Smith and Hazel, Williams, and Mulamba & Mock were applied and weighted for four economic weights (1, CVg, CVg/CVe, and h2). Among the tested selection indexes, those of Williams and Mulamba & Mock are the best-fit ones for the selection of topcross hybrids of green maize, as they provide positive and more balanced selection gains for all evaluated traits. The REML/BLUP method shows better predicted genetic gains than those achieved by the three selection indexes, besides being efficient for the selection of topcross hybrids of green maize.

scholarly journals Molecular and Aggressiveness Characterization of Isolates of Fusarium solani and Fusarium oxysporum f.sp. passiflorae Associated to Passion Fruit Wilting

2019 ◽  
Vol 11 (3) ◽  
pp. 407
Author(s):  
Thalita N. Marostega ◽  
Lizandra P. Lara ◽  
Daiani da S. de Oliveira ◽  
Antonio M. Chimello ◽  
Thiago Alexandre S. Gilio ◽  
...  
Keyword(s):  
Fusarium Solani ◽  
Passion Fruit ◽  
Gene Pools ◽  
Breeding Programs ◽  
Mato Grosso ◽  
Collar Rot ◽  
Molecular Variability ◽  
Selection Of ◽  
Sour Passion Fruit

This work was carried out with the objective of performing a molecular and aggressiveness characterization of F. solani and F. oxysporum f.sp. passiflorae collected in the Pantanal, Cerrado and Amazon biomes. We selected the most aggressive isolates for use in breeding programs aiming resistance to Collar Rot and Fusariosis. For inoculation of the isolates of F. oxysporum f.sp. passiflorae the washed root method was used. The molecular characterization of the isolates was carried out by partial sequencing of the Transcribed Internal Spacer of the rDNA region. The isolates of F. solani formed two distinct groups in relation to aggressiveness. Among all isolates, FSUNEMAT 40 and FSUNEMAT 46 were the most aggressive. The model with K=2 was taken as the best model to explain the genetic structure of the F. solani populations, with clear combinations of genes from both gene pools. There were three groups with respect to the aggressiveness of the isolates of F. oxysporum f.sp. passiflorae, with the isolated FOUNEMAT 22 being the most aggressive. In view of these results, the isolates of F. solani collected in P. edulis in the state of Mato Grosso presented a high molecular variability independent from the biome of origin, and this was also observed in the tests of aggressiveness. The results indicate the need to consider the molecular variability and the aggressiveness of the pathogens in the evaluation of genotypes of sour passion fruit in programs of selection of resistant cultivars.

Multivariate analysis to quantify genetic diversity and family selection in sour passion fruit under recurrent selection

Euphytica ◽  
2021 ◽  
Vol 217 (1) ◽  
Author(s):  
Amanda Fernanda Nunes Ferreira ◽  
Willian Krause ◽  
Maria Helena Menezes Cordeiro ◽  
Alexandre Pio Viana ◽  
Eileen Azevedo Santos ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Multivariate Analysis ◽  
Recurrent Selection ◽  
Passion Fruit ◽  
Family Selection ◽  
Sour Passion Fruit

Analysis of yield and oil from a series of canola breeding trials. Part II. Exploring variety by environment interaction using factor analysisThis article is one of a selection of papers from the conference “Exploiting Genome-wide Association in Oilseed Brassicas: a model for genetic improvement of major OECD crops for sustainable farming”.

Genome ◽  
2010 ◽  
Vol 53 (11) ◽  
pp. 1002-1016 ◽  
Author(s):  
B.R. Cullis ◽  
A.B. Smith ◽  
C.P. Beeck ◽  
W.A. Cowling
Keyword(s):  
Pedigree Information ◽  
Environment Interaction ◽  
Correlation Matrices ◽  
New Approach ◽  
Genome Wide ◽  
Selection Indices ◽  
New Varieties ◽  
Oilseed Brassicas ◽  
Analytic Models ◽  
Selection Of

Exploring and exploiting variety by environment (V × E) interaction is one of the major challenges facing plant breeders. In paper I of this series, we presented an approach to modelling V × E interaction in the analysis of complex multi-environment trials using factor analytic models. In this paper, we develop a range of statistical tools which explore V × E interaction in this context. These tools include graphical displays such as heat-maps of genetic correlation matrices as well as so-called E-scaled uniplots that are a more informative alternative to the classical biplot for large plant breeding multi-environment trials. We also present a new approach to prediction for multi-environment trials that include pedigree information. This approach allows meaningful selection indices to be formed either for potential new varieties or potential parents.

SPECIAL ARTICLE

PEDIATRICS ◽  
1954 ◽  
Vol 14 (5) ◽  
pp. 563-564
Author(s):  
Keyword(s):  
Standard Deviation ◽  
Visual Assessment ◽  
Probable Error ◽  
Oral Examination ◽  
Frequency Curve ◽  
Written Examination ◽  
Lower Figure ◽  
Normal Frequency ◽  
The Mean ◽  
Selection Of

THE WRITTEN examination of January 15, 1954, was taken by 515 candidates, a larger number than in any previous year except 1953 when there were 607 candidates Grades ranged from a lowest mark of 32.0 to a highest mark of 89.5 Inspection of the range resulted in the decision to place the passing mark at 51. On this basis there were 32, or 6.2%, who failed and were therefore ineligible for oral examination. The distribution of the grades earned by the 515 candidates is presented in the form of a histogram. As an aid to visual assessment of the nature of the distribution, a normal frequency curve computed from the mean and standard deviation of the data has been superimposed on the diagram. The distribution of the grades is clearly and impressively skewed to the left, that is, the scores tend to be massed at the high end of the scale and spread out at the low end. An examination of this type is relatively sensitive in the zone of poorer scholarship where the selection of failures is to be made and relatively insensitive in the range of higher scholarship. The intrinsic reliability of the examination has again been assessed by comparing the grade made by each candidate on his odd-numbered questions with that earned on his even-numbered questions. The comparison reveals a "probable error of estimate," P.E.m, of 2.39, a lower figure and therefore a higher degree of reliability than yielded by any previous examination. The Committee is pleased that the increase in reliability was accomplished in spite of the fact that the length of the examination was decreased from 250 grading points in 1953 to 200 grading points.

Variable selection of high-dimensional non-parametric nonlinear systems by derivative averaging to avoid the curse of dimensionality

Automatica ◽  
2019 ◽  
Vol 101 ◽  
pp. 138-149 ◽  
Author(s):  
Er-Wei Bai ◽  
Changming Cheng ◽  
Wen-Xiao Zhao
Keyword(s):  
Nonlinear Systems ◽  
Variable Selection ◽  
Curse Of Dimensionality ◽  
High Dimensional ◽  
Selection Of ◽  
Non Parametric

data a; * significance level; a=0.05; * variance of difference of two observations on the log scale; * sigmaW = within-subjects standard deviation; sigmaW=0.355; s=sqrt(2)*sigmaW; * total number of subjects (needs to be a multiple of 2); n=58; * error degrees of freedom for AB/BA cross-over with n subjects in total; n2=n-2; * ratio = mu_T/mu_R; ratio=1.00; run; data b; set a; * calculate power; t1=tinv(1-a,n-2); t2=-t1; nc1=(sqrt(n))*((log(ratio)-log(0.8))/s); nc2=(sqrt(n))*((log(ratio)-log(1.25))/s); df=(sqrt(n-2))*((nc1-nc2)/(2*t1)); prob1=probt(t1,df,nc1); prob2=probt(t2,df,nc2); answer=prob2-prob1; power=answer*100; run; proc print data=b; run; As an example of using this SAS code, suppose µ = 1, σ = 0.355, α = 0.05 and n = 58. The power (as a percentage) is calculated as 90.4. The required number of subjects to achieve a given power can easily be obtained by trial and error using a selection of values of n. An alternative approach is to use trial and error directly on the sample size n for a given power. For more on this see Phillips (1990) and Diletti et al. (1991), for example. 7.4 Individual bioequivalence As noted in Section 7.1, individual bioequivalence (IBE) is a criterion for deciding if a patient who is currently being treated with R can be

2003 ◽  
pp. 362-362
Keyword(s):  
Standard Deviation ◽  
Sample Size ◽  
Degrees Of Freedom ◽  
Trial And Error ◽  
Significance Level ◽  
Individual Bioequivalence ◽  
Alternative Approach ◽  
Within Subjects ◽  
Log Ratio ◽  
Selection Of

scholarly journals Phenology of the production of flowers and fruits of wild and hybrid species of the genus Passiflora

2018 ◽  
Vol 40 (2) ◽  
Author(s):  
Danilo Akio de Sousa Esashika ◽  
Fábio Gelape Faleiro ◽  
Nilton Tadeu Vilela Junqueira
Keyword(s):  
Central Region ◽  
Wild Species ◽  
High Potential ◽  
Passion Fruit ◽  
Brazilian Savanna ◽  
Breeding Programs ◽  
Hybrid Species ◽  
Floral Buds ◽  
Sour Passion Fruit

Abstract Wild species of passion fruit have characteristics that could be used in the passiflora culture, among them the production of fruits in the off-season of the sour passion fruit. The objective of this work was to evaluate the phenology of flowers and fruits production in wild species cultivated in the Brazilian Savanna Central Region. For each access, a 1-meter-long strip (2 m2) was evaluated for the presence of flowers and fruits from January 2015 to December 2016. The hybrid and wild species of passiflora that produce floral buds, flowers and fruits during the off-season of passion fruit sour include: BRS Céu do Cerrado (P. incarnata x P. edulis), P. alata Dryand, P. bahiensis Klotzsch, P. coccinea Aubl., P. maliformis L., P. quadriglandulosa Rodschied, P. auriculataKunth, P. decaisneana G. Nicholson, P. sidifolia M. Roem., P. suberosa L., P. tholozanii Sacco, P. quadrangularis x P. alata. It was also verified the presence of species and hybrids with high ornamental potential due to the beauty of their flowers and their production during the whole year, such as: P. suberosa L., P. tholozanii Sacco, P. coccinea x P. setacea, P. coccinea x P. quadrifaria. These species and hybrids have high potential for passiflora breeding programs as a source of genes of interest.

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