scholarly journals Plant selection in F2 segregating populations of papaya from commercial hybrids

2012 ◽  
Vol 12 (3) ◽  
pp. 191-198 ◽  
Author(s):  
Eder Jorge Oliveira ◽  
Gilberto de Andrade Fraife Filho ◽  
Juan Paulo Xavier de Freitas ◽  
Jorge Luiz Loyola Dantas ◽  
Marcos Deon Vilela de Resende
Keyword(s):  
Genetic Parameters ◽  
Mixed Model ◽  
Soluble Solids ◽  
Fruit Firmness ◽  
Plant Selection ◽  
F2 Population ◽  
The Common ◽  
Mixed Model Methodology ◽  
Fruit Diameter ◽  
Selection Of

The objective of this paper was to estimate the genetic parameters and additive genetic values in segregating populations of papaya using the mixed model methodology. Two F2 populations from Tainung and Calimosa hybrids were evaluated. The experimental design was an augmented block with four replicates, and Golden and Calimosa cultivars were the common treatment. Estimates of individual heritability were high for fruit length (FL) and weight (FW), moderate for fruit diameter (FD), and low for total soluble solids (TSS) and fruit firmness (FF). Considering FF and TSS as main traits for selection, genotypes of Calimosa-F2 population showed better performance to FF, but worse concerning TSS. It was selected 18.3% and 24.6% of plants from Tainung-F2 and Calimosa-F2 populations, respectively. Negative correlation between TSS and FF was not able to reduce the genetic gains. The segregating populations from Calimosa hybrid are more promising for the selection of papaya lines.

scholarly journals Selection of coffee progenies for resistance to nematode Meloidogyne paranaensis in infested area

2014 ◽  
Vol 14 (2) ◽  
pp. 94-101 ◽  
Author(s):  
Sonia Maria Lima Salgado ◽  
Juliana Costa de Rezende ◽  
José Airton Rodrigues Nunes
Keyword(s):  
Genetic Variability ◽  
Coffea Arabica ◽  
Mixed Model ◽  
High Rate ◽  
Germplasm Bank ◽  
Genotypic Association ◽  
Coffee Plants ◽  
Plagiotropic Branches ◽  
Mixed Model Methodology ◽  
Selection Of

The purpose of this study was to select Coffea arabica progenies for resistance to M. paranaensis in an infested coffee growing area using Henderson's mixed model methodology. Forty-one genotypes were selected at the Coffee Active Germplasm Bank of Minas Gerais, and evaluated in regard to stem diameter, number of plagiotropic branches, reaction to the nematode, and yield per plant. There was genetic variability among the genotypes studied for all the traits evaluated, and among the populations studied for yield and reaction to the nematode, indicating possibilities for obtaining genetic gains through selection in this population. There was high rate of genotypic association between all the traits studied. Coffee plants of Timor Hybrid UFV408-01 population, and F3 progenies derived from crossing Catuaí Vermelho and Amphillo MR 2161 were the most promising in the area infested by M. paranaensis.

scholarly journals Selection of half-sib families of creole melon (Cucumis melo L.) on the Ecuadorian coast

2019 ◽  
Vol 13 (2) ◽  
pp. 178-185
Author(s):  
Francisco Espinosa ◽  
Franco Alirio Vallejo ◽  
Lauden Rizzo
Keyword(s):  
Block Design ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Genetic Progress ◽  
Randomized Complete Block Design ◽  
Sib Families ◽  
High Production ◽  
Cucumis Melo L ◽  
Fruit Diameter ◽  
Selection Of

The creole melon cantaloupe is a horticultural species, whose fruits are used for human nutrition. However, no research has been reported on their genetic variability for starting breeding processes. The objective of this study was to take advantage of the variability of creole melons for genetic improvement. 20 creole melon half-sib families were selected and evaluated for production characteristics and fruit quality in order to obtain improved populations. The study was carried out in Palenque canton, Ecuador. Seeds from 20 half-sib families were used, arranged in a randomized complete block design with three replications. The differences between the families were significant for all the studied characteristics. Family 93 presented higher averages for fruit weight, fruit diameter and production (per hectare), and family 196 did so for soluble solids. The phenotypic correlations were positive and significant between the fruit weight and fruit diameter, fruit length, pulp thickness, fruit cavity, soluble solids and production. The coefficients of genetic variation, in general, were lower than the coefficients of environmental variation. The estimates of heritability broadly had a moderate magnitude (30-60%) for the 10 evaluated characteristics, and the magnitude of the expected genetic progress was low (<10%) for the fruit weight, production, and soluble solids, so the selection for high production should focus on fruit weight and soluble solids.

SIMULTANEOUS ESTIMATION OF GENETIC PARAMETERS OF LIFETIME REPRODUCTIVE TRAITS IN MICE

1988 ◽  
Vol 68 (4) ◽  
pp. 1291-1295 ◽  
Author(s):  
J. NAGAI ◽  
C. Y. LIN ◽  
A. J. McALLISTER
Keyword(s):  
Genetic Parameters ◽  
Mixed Model ◽  
Reproductive Traits ◽  
Bivariate Analysis ◽  
Simultaneous Estimation ◽  
Mixed Model Analysis ◽  
Reproductive Life ◽  
Genetic And Phenotypic Correlations ◽  
Estimation Of Genetic Parameters ◽  
Selection Of

Heritabilities and correlations between the length of reproductive life and number of parturitions during lifetime in mice were estimated from bivariate full-sib mixed-model analysis. Heritability estimates from sire components were low (0.01) for the two traits and those from dam components were slightly higher (0.06 and 0.05). Estimates of genetic and phenotypic correlations ranged from 0.89 to 0.99. It was concluded that the two traits are virtually the same trait biologically. Implication of these results for selection of lifetime production in mice and dairy cattle is discussed. Key words: Genetic parameters, reproductive trait, bivariate analysis

scholarly journals Genetic analysis of exotic germplasms of pomegranate (Punica granatum L.)

2020 ◽  
Vol 49 (1) ◽  
pp. 105-112
Author(s):  
Suparna Sinha ◽  
Dinesh Singh Thakur ◽  
Manoj Kundu ◽  
Feza Ahmad
Keyword(s):  
Genetic Parameters ◽  
Genetic Difference ◽  
Titratable Acidity ◽  
Punica Granatum ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Hybridization Method ◽  
Plant Type ◽  
Punica Granatum L ◽  
Selection Of

Twenty exotic pomegranate (Punica granatum L.) germplasms were studied to determine the genetic parameters to understand the usefulness of genotypes in the breeding program. Forty characteristics were measured in fruits, arils, leaves, and flowers, as well as juice characteristics including, total soluble solids, titratable acidity, sugars, anthocyanin, and phenols. Analysis of variance establishes that among all the parameters analyzed, a significant genetic difference was present for yield and yield attribution traits of the studied pomegranate germplasm. All plants were grouped into five clusters among them Green Globe and Hakubotan were most distinct from others. Saharnyi, Orange, Ovadan, Nusai, Kaim-anar, Al-Sirin-Nar, 20090265, Eve and Sogdiana may be used as one of the parent with another parent Green Globe for getting better recombinants by hybridization method. The presence of significant inter-cluster variations revealed that hybridization program could be useful for the development of better plant type by using this pomegranate germplasms. Factor analysis exhibits that fruit weight shown to have the highest different value in the tested pomegranate germplasms so that this trait can be used for the separation and selection of pomegranate germplasms.

scholarly journals Genetic progress with selection of Coffea canephora clones of superior processed coffee yield

2018 ◽  
Vol 48 (3) ◽  
Author(s):  
Dulcilene Oliveira da Silva ◽  
Fábio Medeiros Ferreira ◽  
Rodrigo Barros Rocha ◽  
Marcelo Curitiba Espindula ◽  
Victor Mouzinho Spinelli
Keyword(s):  
Genetic Parameters ◽  
Linear Prediction ◽  
Coffea Canephora ◽  
Northern Region ◽  
Superior Performance ◽  
Plant Selection ◽  
Genetic Progress ◽  
Coffee Yield ◽  
Clonal Test ◽  
Selection Of

ABSTRACT: The aim of this study was to select Coffea canephora clones of superior processed coffee productivity based on the estimates of the genetic parameters and of genetic progress with the plant selection. For this, the production of processed coffee from 130 clones was evaluated from 2014 to 2016 in a clonal test, installed in randomized complete blocks with four plants per plot and six replications, spaced 3 × 2m at the experiment station Embrapa Rondônia in the municipality of Ouro Preto do Oeste - RO. The estimation of genetic parameters and prediction of genotypic values were performed using REML/BLUP procedure (Restricted Maximum Likelihood/Best Unbiased Linear Prediction). Estimates of the genetic parameters confirmed the predominance of the genetic component in the expression of this trait, indicating the possibility of obtaining gains with the plant selection. Genetic progress of processed coffee productivity from the selection of 10% of the best clones was 49.88%, which is equivalent to an increase in average productivity from 42.57 bags.ha-1 to 66.95 bags.ha-1. The use of the harmonic mean of the genetic values helped to identify the clones of superior performance, with higher adaptability and stability for the northern region of Brazil.

scholarly journals Genetic parameters and simultaneous selection for root yield, adaptability and stability of cassava genotypes

2013 ◽  
Vol 48 (12) ◽  
pp. 1562-1568 ◽  
Author(s):  
João Tomé de Farias Neto ◽  
Elisa Ferreira Moura ◽  
Marcos Deon Vilela de Resende ◽  
Pedro Celestino Filho ◽  
Sebastião Geraldo Augusto
Keyword(s):  
Genetic Parameters ◽  
Mixed Model ◽  
Block Design ◽  
Genotypic Variation ◽  
Root Yield ◽  
Growing Seasons ◽  
Randomized Block Design ◽  
Simultaneous Selection ◽  
Selection For ◽  
Mixed Model Methodology

The objective of this work was to estimate genetic parameters and to evaluate simultaneous selection for root yield and for adaptability and stability of cassava genotypes. The effects of genotypes were assumed as fixed and random, and the mixed model methodology (REML/Blup) was used to estimate genetic parameters and the harmonic mean of the relative performance of genotypic values (HMRPGV), for simultaneous selection purposes. Ten genotypes were analyzed in a complete randomized block design, with four replicates. The experiment was carried out in the municipalities of Altamira, Santarém, and Santa Luzia do Pará in the state of Pará, Brazil, in the growing seasons of 2009/2010, 2010/2011, and 2011/2012. Roots were harvested 12 months after planting, in all tested locations. Root yield had low coefficients of genotypic variation (4.25%) and broad-sense heritability of individual plots (0.0424), which resulted in low genetic gain. Due to the low genotypic correlation (0.15), genotype classification as to root yield varied according to the environment. Genotypes CPATU 060, CPATU 229, and CPATU 404 stood out as to their yield, adaptability, and stability.

scholarly journals Seleção de cultivares de cana-de-açúcar para a Zona da Mata Norte de Pernambuco III: Final de safra

2016 ◽  
Vol 11 (2) ◽  
pp. 39
Author(s):  
Aurélia Pietrina da Costa Albuquerque ◽  
Gerson Quirino Bastos ◽  
João de Andrade Dutra Filho ◽  
Lauter Silva Souto ◽  
Patricio Borges Maracajá ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Forest Zone ◽  
The Third ◽  
The North ◽  
Commercial Cultivation ◽  
Improved Cultivars ◽  
Solids Content ◽  
Selection Of

<p>Sendo os cultivares melhorados a base de sustentação e desenvolvimento do setor sucroeneregético no Brasil, objetivou-se com este trabalho avaliar o desempenho agroindustrial de 26 cultivares de cana-de-açúcar na microrregião canavieira da Mata Norte de Pernambuco. O experimento foi conduzido na área agrícola da Usina Olho D’água, onde foi utilizado o delineamento experimental em blocos casualizados com quatro repetições. As variáveis analisadas foram: toneladas de pol por hectare, toneladas de cana por hectare, fibra, pol % corrigida, pureza, teor de sólidos solúveis e açúcar total recuperável. Realizou-se a análise de variância conjunta dos experimentos e estimativa de parâmetros genéticos, as médias foram agrupadas pelo teste de Scott e Knott ao nível de 5% de probabilidade. Realizou-se ainda a rentabilidade econômica bruta de cada cultivar.  Constatou-se que a seleção de cultivares superiores deve ser baseada nas variáveis TPH e TCH. Como opções de cultivo comercial para a terceira época de colheita destacam-se como mais produtivas, RB92579, RB867515 e RB93509.</p><p align="center"><strong><em>Selection of sugarcane cultivars to the North Forest Zone of Pernambuco III: Final crop</em></strong></p><p><strong>Abstract: </strong>Improved cultivars are support base and development of energétic and alcohol sector in Brazil, aimed with this work was to evaluate the agroindustrial performance of 26 sugarcane cultivars in the microrregion da Mata Norte of Pernambuco. The experiment was conducted in the agricultural area of the sugarmill Olho d'gua, which was used a randomized block with four replications. The variables analyzed were tons of pol per hectare, sugarcane tons per hectare, fiber, corrected pol%, purity, soluble solids content and total recoverable sugar. Were conducted the variance analysis and estimation of genetic parameters, the averages were grouped by the Scott and Knott test at 5% probability. It was held still gross economic profitability of each cultivar. The selection of superior cultivars should be based on TPH and TCH variables. As commercial cultivation options for the third harvest season stand out as more productive, RB92579, RB867515 e RB93509.<strong></strong></p><p> </p>

scholarly journals Efficiency of selection within sugarcane families via simulated individual BLUP

2015 ◽  
Vol 15 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Felipe Lopes da Silva ◽  
Márcio Henrique Pereira Barbosa ◽  
Marcos Deon Vilela de Resende ◽  
Luiz Alexandre Peternelli ◽  
Cássia Ângela Pedrozo
Keyword(s):  
Mixed Model ◽  
Optimal Number ◽  
Soluble Solids ◽  
Individual Selection ◽  
Total Soluble Solids ◽  
Sib Families ◽  
The Individual ◽  
Efficiency Of Selection ◽  
Mixed Model Methodology ◽  
Genotypic Effects

The aim of this study was to assess the efficiency of the simulated individual BLUP (BLUPIS) method in selecting genotypes within full-sib families of sugarcane in ratoon stage, through comparison with selection using the individual BLUP method. The optimal number of genotypes to be selected in the best families were established for mean stems mass, total soluble solids assay (BRIX), ton of stalks per hectare, and BRIX tons per hectare traits. Seventeen full-sib families were assessed in the Centre for Experimentation in Sugarcane, located in Oratórios, MG, Brazil. Mixed model methodology was used to predict the genotypic effects of each family and the genotypic values of each individual within family. BLUPIS method is efficient for individual selection. The optimal number of genotypes to be selected in the best family for obtaining higher efficiency of the BLUPIS method is 100 in the majority of cases.

scholarly journals Adaptability and stability of early carioca beans by mixed models

2020 ◽  
Vol 36 ◽  
Author(s):  
Thalyson Vasconcelos Lima ◽  
Paulo Ricardo Dos Santos ◽  
Tâmara Rebecca Albuquerque De Oliveira ◽  
Maxwel Rodrigues Nascimento ◽  
Kleyton Danilo da Silva Costa ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Mixed Model ◽  
Block Design ◽  
Phenotypic Expression ◽  
Environment Interaction ◽  
Randomized Block Design ◽  
Specific Performance ◽  
Superior Genotypes ◽  
The Mean ◽  
Selection Of

The genotype x environment interaction represents one of the major selection challenges due to the difficulty in identifying effectively superior genotypes. The present study aimed at estimating genetic parameters and selecting genotypes of early Carioca beans by analyzing simultaneous attributes, including yield, adaptability, and stability. In the agricultural year of 2015 and 2016, three trials were conducted, using a randomized block design, with three repetitions each, in the Agreste and Sertao regions of Pernambuco State. The genetic parameters were estimated using the mixed model procedure, and the selection was based on the harmonic mean of the relative performance of genetic values (MHPRVG, abbreviation in Portuguese) method. The environments influenced the phenotypic expression of the bean genotypes during both years, setting a specific adaptation. The mean heritability of the genotypes regarding yield exhibited low magnitude values  in the trials of 2015 (5.78%) and 2016 (13.77%), indicating costly conditions for the selection of the improved genotypes. Genotype CNFC 15856 was selected, considering the genetic gain predicted for yield, by the average and specific performance in the three environments, and by the simultaneous attributes of yield, adaptability, and stability. The MHPRVG method enables the optimized selection of genotypes considering yield, stability, and adaptability; therefore, it should be included in the recommended selective criteria for agronomically superior genotypes in commercial plantations.

scholarly journals Evaluation of Genotypes and Association of Traits in Watermelon Across Two Southern Texas Locations

Horticulturae ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 67
Author(s):  
Edgar Correa ◽  
Subas Malla ◽  
Kevin M. Crosby ◽  
Carlos A. Avila
Keyword(s):  
Management Practices ◽  
Nutrient Management ◽  
Total Yield ◽  
Fruit Weight ◽  
Climatic Conditions ◽  
Soluble Solids ◽  
Genotype By Environment ◽  
Breeding Resources ◽  
Fruit Diameter ◽  
Selection Of

Watermelon is the most important horticultural crop in Texas and is grown across the state under diverse environments. Our study was conducted in the southern region of Texas to understand genotype-by-environment interactions and the contribution of yield components to yield. To accomplish this, twenty genotypes were evaluated for important traits and characteristics at two locations, Uvalde and Weslaco TX, for two years, 2018 and 2019. The genotypes were evaluated for total yield, total fruit count, total soluble solids, rind thickness, fruit length, diameter and weight. Genotype-by-environment (G x E) interaction was not significant, possibly due to similarity in climatic conditions and nutrient management practices. In the grouped analysis, cultivars Crimson Diamond, Sunshade and the breeding line TAM 2 had a higher total yield. Path analysis showed a high direct effect for total fruit count and fruit diameter of 0.89 and 0.85, respectively. However, total fruit count had a high indirect effect of −0.44. Fruit weight was the only trait that showed a significant (p < 0.01) correlation towards total yield at r = 0.58. Neither of the high direct effects, total fruit count and fruit diameter, had a significant correlation. The study inferred that breeding resources could be optimized by reducing the testing location to only one representative location for measured traits in southern Texas. The indirect selection of total fruit or fruit diameter could result in better yield. The study suggested selecting for optimum total fruit and fruit diameter for higher yield.

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