scholarly journals Study of repeatability and phenotypical stabilization in kale using frequentist, Bayesian and bootstrap resampling approaches

2019 ◽  
Vol 41 (1) ◽  
pp. 42606
Author(s):  
Orlando Gonçalves Brito ◽  
Valter Carvalho de Andrade Júnior ◽  
Alcinei Mistico de Azevedo ◽  
Luan Mateus Silva Donato ◽  
Lidiane Rodrigues Silva ◽  
...  
Keyword(s):  
Genetic Improvement ◽  
Genetic Parameters ◽  
Block Design ◽  
Bootstrap Resampling ◽  
Average Mass ◽  
Estimated Parameters ◽  
Randomized Block Design ◽  
Number Of Leaves ◽  
Bayesian Methodologies ◽  
Selection Of

The aim of this study was to obtain information for the genetic improvement of kale through repeatability and phenotypic stabilization studies and to compare methodologies that represent the reliability of the estimated parameters. Thirty-three half-sib progenies were evaluated in a randomized block design with three replicates and six plants per plot. Eight harvests were evaluated in terms of the yield of fresh leaves, number of shoots, number of leaves and average mass of leaves. Then, a phenotypic repeatability and stabilization study was performed, estimating the genetic parameters σ2a, σ²g, σ²e, and the coefficient of environmental variation and repeatability using the frequentist and Bayesian methodologies. To evaluate the reliability of these estimates, intervals were obtained using the frequentist, Bayesian and bootstrap methods. It was verified that the reliable selection of progenies of half-sib of kale can be achieved in four harvests that were realized between 95 and 170 days after planting. It was observed that the frequentist and Bayesian methodologies are better suited to obtain reliable estimates of the genetic parameters evaluated, as the last one provided smaller amplitudes for the obtained intervals. The bootstrap methodologies are not recommended for phenotypic repeatability and stabilization studies in kale.

Caracterização da Peneira Média em Clones de Coffea canephora

REVISTA FIMCA ◽  
2018 ◽  
Vol 5 (2) ◽  
pp. 28-31
Author(s):  
Darlan Darlan Sanches Barbosa Alves ◽  
Victor Mouzinho Spinelli ◽  
Marcos Santana Moraes ◽  
Carolina Augusto De Souza ◽  
Rodrigo da Silva Ribeiro ◽  
...  
Keyword(s):  
Genetic Improvement ◽  
Block Design ◽  
Coffea Canephora ◽  
Coffee Production ◽  
Randomized Block Design ◽  
Significant Difference ◽  
The Mean ◽  
Four Blocks ◽  
Selection Of

Introdução: O estado de Rondônia se destaca como tradicional produtor de café, sendo o segundo maior produtor brasileiro de C. canephora. No melhoramento genético de C. canephora, a seleção de plantas de elevada peneira média está associada à bebida de qualidade superior. Objetivos: O objetivo desse estudo foi avaliar a variabilidade genética de clones de C. canephora para o tamanho dos grãos, mensurado a partir da avaliação da peneira média (PM). Materiais e Métodos: Para isso, foi conduzido ao longo de dois anos agrícolas experimento no campo experimental da Embrapa no município de Ouro Preto do Oeste-RO, para a avaliação da peneira média de 130 genótipos (clones) com características das variedades botânicas Conilon, Robusta e híbridos intervarietais. O delineamento experimental utilizado foi de blocos ao acaso, com quatro repetições de quatro plantas por parcela. Resultados: Não houve resultados significativos para a interação clones X anos, indicando uma maior consistência no comportamento das plantas ao longo do tempo. Porém foram observadas diferenças significativas para o tamanho dos grãos entre os genótipos avaliados, possibilitando selecionar genótipos superiores. Conclusão: Os genótipos agruparam-se em cinco classes de acordo com o teste de média, subsidiando a caracterização de um gradiente de variabilidade da característica avaliada ABSTRACTIntroduction: Coffea canephora accounts for approximately 35% of the world's coffee production. The state of Rondônia stands out as a traditional coffee producer, being the second largest Brazilian producer of C. canephora. In the classical genetic improvement of C. anephora, the selection of plants of high average sieve is associated with a drink of superior quality. Objectives: The objective of this udy was to evaluate the genetic variability of Coffea canephora clones for the agronomic medium sieve (PM). Materials and Methods: The experiment was conducted in the experimental field of Embrapa, municipality of OuroPreto do Oeste-RO, located at coordinates 10º44'53 "S and 62º12'57". One hundred thirty genotypes (clones) of botanical characteristics Conilon, Robusta and intervarietal hybrids were evaluated in the agricultural years 2013-2014 and 2014-2015. The experimental design was a randomized block design with four blocks and four plants per plot, spacing 3.5 x 1.5 meters between plants. Results: Significant difference was found for the grain size. According to the F test, at 5% probability, the genotypes were grouped into five classes according to the mean test. Conclusion: The results obtained subsidized the characterization of a variability gradient of the evaluated trait.

scholarly journals Genetic parameters and estimated genetic gains in young rubber tree progenies

2013 ◽  
Vol 48 (4) ◽  
pp. 411-416 ◽  
Author(s):  
Cecília Khusala Verardi ◽  
Erivaldo José Scaloppi Junior ◽  
Guilherme Augusto Peres Silva ◽  
Lígia Regina Lima Gouvêa ◽  
Paulo de Souza Gonçalves
Keyword(s):  
Genetic Gain ◽  
Genetic Parameters ◽  
Block Design ◽  
Rubber Tree ◽  
First Year ◽  
Genetic Gains ◽  
Selection Gain ◽  
Randomized Block Design ◽  
Using Data ◽  
Selection Of

The objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of the state of São Paulo, Brazil. Twenty-two progenies were evaluated, from three to five years old, for rubber yield and annual girth growth. Genetic gain was estimated with the multi-effect index (MEI). Selection by progenies means provided greater estimated genetic gain than selection based on individuals, since heritability values of progeny means were greater than the ones of individual heritability, for both evaluated variables, in all the assessment years. The selection of the three best progenies for rubber yield provided a selection gain of 1.28 g per plant. The genetic gains estimated with MEI using data from early assessments (from 3 to 5-year-old) were generally high for annual girth growth and rubber yield. The high genetic gains for annual girth growth in the first year of assessment indicate that progenies can be selected at the beginning of the breeding program. Population effective size was consistent with the three progenies selected, showing that they were not related and that the population genetic variability is ensured. Early selection with the genetic gains estimated by MEI can be made on rubber tree progenies.

scholarly journals Assessing the genotypic performance of carioca beans through mixed models

2018 ◽  
Vol 48 (7) ◽  
Author(s):  
Yure Pequeno de Souza ◽  
Paulo Ricardo dos Santos ◽  
Maxwel Rodrigues Nascimento ◽  
Kleyton Danilo da Silva Costa ◽  
Thalyson Vasconcelos Lima ◽  
...  
Keyword(s):  
Mixed Models ◽  
Selection Criteria ◽  
Genetic Parameters ◽  
Block Design ◽  
Breeding Programs ◽  
Randomized Block Design ◽  
Bean Yield ◽  
The Mean ◽  
Moderate Magnitude ◽  
Selection Of

ABSTRACT: Using genotypes adapted to different regions is one of the main ways to increase Brazilian bean yield. The aim of the present study was to assess the genotypic performance of Carioca beans through mixed models. Fourteen Carioca bean genotypes were assessed in four locations in Pernambuco State (Arcoverde, Caruaru, Belém de São Francisco and São João counties) in 2015. The experiments followed a completely randomized block design, with three repetitions. Genetic parameters were estimated according to the REML/BLUP methodology, whereas genotype selection was based on the harmonic mean of relative performance of genetic values method (MHPRVG). The mean genotype heritability had moderate magnitude, high selective accuracy, besides allowing selection of agronomically superior individuals. Genotypes ‘BRS Notável’, CNFC 15480 and ‘IPR 139’ showed good adaptability and grain yield stability. There was agreement among the statistics μ ̂ + g ̂…, stability (MHVG), adaptability (PRVG), and stability and adaptability of genetic values (MHPRVG) in the discrimination of the most productive genotypes, which presented high adaptability and stability. This outcome indicated that these genotypes can be part of the selection criteria regularly used in bean breeding programs.

scholarly journals Prediction of genetic gains with selection between and within S2 progenies of papaya using the REML/Blup analysis

2017 ◽  
Vol 52 (12) ◽  
pp. 1167-1177 ◽  
Author(s):  
Tamiris Pereira da Silva ◽  
Francisco das Chagas Vidal Neto ◽  
Júlio César Do Vale
Keyword(s):  
Genetic Gain ◽  
Carica Papaya ◽  
Genetic Parameters ◽  
Block Design ◽  
Stem Diameter ◽  
Average Mass ◽  
Genetic Gains ◽  
Randomized Complete Block Design ◽  
Selection Of

Abstract: The objective of this work was to predict the genetic gains with selection of superior individuals within papaya (Carica papaya) progenies using the REML/Blup analysis. Thirty-six S2 progenies, originated from the Calimosa and Tainung 1 hybrids, and two commercial control checks were evaluated in a randomized complete block design, with four replicates. The following traits were evaluated: heights of plants and first fruit; stem diameter at 12 and 18 months; number of days required for fruiting; number, mass, and average mass of commercial fruit; and number and mass of carpelloid and pentandric fruit. The magnitudes of the genetic parameters indicated that the variability present in most of the characters allows greater genetic gain if the selection is made at the progeny level, and not in individual plants. For selection among progenies, PROT-268, PROT-74, PROT-55, and PROT-22 were the most promising, with the greatest genetic gain for the studied characters. In the selection among and within progenies, the prediction of the gains is higher for the increase in the expression of the number of commercial fruit and for the decrease in the expression of pentandric fruit.

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 Desempenho agronômico de consórcios entre rabanete e alface no Oeste goiano

2015 ◽  
Vol 10 (3) ◽  
pp. 56 ◽  
Author(s):  
A. M. Custódio ◽  
E. M. Alves ◽  
T. P. Paim ◽  
H. A. Carneiro ◽  
A. F. Lima Junior
Keyword(s):  
Aerial Part ◽  
Statistical Difference ◽  
Block Design ◽  
Average Weight ◽  
Agronomic Performance ◽  
Land Equivalent Ratio ◽  
Average Mass ◽  
Randomized Block Design ◽  
Number Of Leaves ◽  
Potential Use

<p>Os consórcios feitos de forma adequada podem resultar em inúmeros benefícios ao agroecossistema e ao produtor. O objetivo foi avaliar aspectos fitotécnicos do rabanete e alface cultivados em consórcio no oeste goiano. Foram testados 4 consórcios (com 8 plantas de alface e 20, 40, 60 e 80 plantas de rabanete, respectivamente, C I, C II, C III e C IV) em relação ao monocultivo de alface (16 plantas) e de rabanete (80 plantas) por metro quadrado. O delineamento foi em blocos casualizados, com quatro repetições. Avaliou o diâmetro, comprimento e massa média das raízes do rabanete; o diâmetro médio do coleto, número de folhas e massa média da parte aérea das plantas de alface e a produtividade de ambas as culturas. Calculou-se o índice de equivalência de área (IEA). O consórcio não afetou o tamanho e peso médio das raízes do rabanete, entretanto, a produtividade do C I (0,46 kg.m<sup>-2</sup>) foi inferior ao C III (1,97 kg.m<sup>-2</sup>), C IV (2,25 kg.m<sup>-2</sup>) e ao monocultivo (2,05 kg.m<sup>-2</sup>). Para a cultura da alface, houve diferença estatística apenas na produtividade, que foi maior no sistema em monocultivo (2,84 kg.m<sup>-2</sup>). Somente o consórcio II (0,82) apresentou IEA inferior ao monocultivo (1,0). Os consórcios apresentam potencial de uso pelos horticultores da região.</p><p align="center"><strong><em>Agronomic performance of intercropping between radish and lettuce in West goiano</em></strong></p><p><strong>Abstract</strong><strong>: </strong>Intercropping properly executed can result in many benefits to the agroecosystem and the farmer. The aim was to evaluate phytotechnical aspects of radish and lettuce intercropped in West Goiás. Four intercropping systems (with 8 lettuce plants and 20, 40, 60 and 80 radish plants, respectively, C I, C II, C III and C IV) were compared to the lettuce monoculture (16 plants) and radish (80 plants) by square meter. The design was a randomized block design with four replications. The diameter, length and average mass of radish roots; the average stem diameter, number of leaves and average mass of the aerial part of lettuce plants and the productivity of both cultures were evaluated. We calculated the land equivalent ratio (IEA). The consortium did not affect the size and average weight of radish roots, however, the C I productivity (0.46 kg.m<sup>-2</sup>) was lower than C III (1.97 kg.m<sup>-2</sup>), C IV (2.25 kg.m<sup>-2</sup>) and monoculture (2.05 kg.m<sup>-2</sup>). To lettuce crop, there was statistical difference only in productivity, which was higher in the system in monoculture (2.84 kg.m<sup>-2</sup>). Only the consortium II (0.82) had less IEA than the monoculture (1.0). The consortiums have a potential use by horticulturists in this region.</p>

scholarly journals CHARACTERIZATION AND EARLY SELECTION OF SILK BLOSSOM ( CALOTROPIS PROCERA ) GENOTYPES WITH FORAGE POTENTIAL

2017 ◽  
Vol 30 (3) ◽  
pp. 794-801 ◽  
Author(s):  
ISAIAS VITORINO BATISTA DE ALMEIDA ◽  
DIOGO GONÇALVES NEDER ◽  
FABIANE RABELO DA COSTA BATISTA ◽  
WELLISON FILGUEIRAS DUTRA
Keyword(s):  
Block Design ◽  
Dry Mass ◽  
High Gain ◽  
Fresh Mass ◽  
Calotropis Procera ◽  
Forage Production ◽  
Randomized Block Design ◽  
Leaf Dry Mass ◽  
Number Of Leaves ◽  
Selection Of

ABSTRACT This study aimed to characterize and select silk blossom genotypes (Calotropis procera) with forage potential. Between April and July 2014, we cultivated 89 genotypes in plastic tubes arranged in a randomized block design with three replications; each experimental plot was composed of 8 plants. The following characteristics were evaluated: plant height (PH), stem diameter (SD), number of leaves (NL), total leaf area (TLA), leaf fresh mass (LFM), stem fresh mass (SFM), root fresh mass (RFM), leaf dry mass (LDM), stem dry mass (SDM), and root dry mass (RDM). Significant differences (p < 0.05) among genotypes were observed for all characteristics, except for NL at 45 and 60 days after sowing (DAS) and for RFM at 60 DAS. Broad-sense heritability estimates and genotype means had medium and high values for most characteristics. Genetic variability among C. procera genotypes was observed. High gain selection was found for the characteristics TLA, PH, SFM, LFM, SDM, and LDM as the genotypes 79, 65, 48, 12, 51, 35, 63, 25, 1, and 46 are suitable for future breeding works to improve forage production.

scholarly journals CARACTERÍSTICAS FITOTÉCNICAS E NUTRICIONAIS DE BANANEIRAS SUBMETIDAS A FONTES DE FERTILIZANTES PARA O MANEJO ORGÂNICO

Nativa ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 367-375
Author(s):  
Jonilson Santos de Carvalho ◽  
Elimarcos Cotrim Bizerra ◽  
Pedro Ricardo Rocha Marques ◽  
Sérgio Luiz Rodrigues Donato ◽  
Diogo Barreto Magalhães ◽  
...  
Keyword(s):  
Block Design ◽  
High Fertility ◽  
Organic Fertilization ◽  
Nutrient Contents ◽  
Average Mass ◽  
Randomized Block Design ◽  
Fe Content ◽  
Nutritional Characteristics ◽  
Fourth Cycle ◽  
Number Of Leaves

Objetivou-se com este trabalho avaliar o estado nutricional e características agronômicas de bananeiras tipo prata sob adubação orgânica, no quarto ciclo de produção, em solos de elevada fertilidade construída. Os tratamentos, duas cultivares (Prata-Anã e BRS Platina) e cinco doses de adubação compostas por esterco bovino e farinha de rocha Naturalplus® foram dispostos em esquema fatorial 2 x 5, em delineamento em blocos casualizados, com três repetições. Foram avaliados: os teores de nutrientes nas folhas; altura de plantas; perímetro do pseudocaule; número de folhas; massa do cacho (kg) e pencas (kg); massa média das pencas (kg) e fruto (g) e massa das cinco primeiras pencas (kg); número de pencas; número de frutos por cacho e penca; massa (g), diâmetro (mm) e comprimento interno e externo do fruto (cm). Doses crescentes de K2O incrementam os teores de N, P e Cu para cultivares Prata-Anã e BRS Platina, que diferem entre si quanto aos teores de Fe, Zn e S. A ‘Prata-Anã’ se destaca com número de folhas e frutos por penca, enquanto a ‘BRS Platina’ maior massa média das pencas e do fruto e comprimento do fruto. As doses aplicadas não influenciam a produção das cultivares BRS Platina e Prata-Anã no quarto ciclo em solos de elevada fertilidade construída.Palavras chave: farinha de rocha; esterco bovino; sustentabilidade. PHYTOTECHNICAL AND NUTRITIONAL CHARACTERISTICS OF BANANA SUBMITTED TO FERTILIZER SOURCES FOR ORGANIC MANAGEMENT ABSTRACT:The objective of this work was to evaluate the nutritional status and agronomic characteristics of silver - type banana under organic fertilization, in the fourth cycle of production, in soils with high fertility. The treatments, two cultivars (Prata-Anã and BRS Platina) and five fertilizer doses composed of bovine manure and Naturalplus® rock flour were arranged in a 2 x 5 factorial scheme, in a randomized block design, with three replications. Leaf nutrient contents were evaluated; plant height; perimeter of the pseudostem; number of leaves; mass of the bunch (kg) and hands (kg); average mass of the hands (kg) and fruit (g) and mass of the first five hands (kg); number of leaves; number of fruits per bunch and hands; mass (g), diameter (mm) and internal and external length of the fruit (cm). Increasing doses of K2O increases N, P and Cu contents for Prata-Anã and BRS Platina cultivars, which differ in Fe content, Zn and S. The ‘Prata-Anã’ stands out with the highest number of leaves and fruits per hands, whereas the 'BRS Platina' presents higher average mass of the fruit and the length of the fruit. The applied doses do not influence the production of the cultivars BRS Platina and Prata-Anã in the fourth cycle in soils with high constructed fertility.Keywords: rock dust; bovine manure; sustainability.

scholarly journals Estimation of genetic parameters and selection of Brachiaria humidicola progenies using a selection index

2012 ◽  
Vol 12 (4) ◽  
pp. 237-244 ◽  
Author(s):  
Ulisses José de Figueiredo ◽  
José Airton Rodrigues Nunes ◽  
Cacilda Borges do Valle
Keyword(s):  
Genetic Parameters ◽  
Nutritive Value ◽  
Agronomic Traits ◽  
Block Design ◽  
Selection Index ◽  
Brachiaria Humidicola ◽  
Randomized Block Design ◽  
The Mean ◽  
Selection For ◽  
Selection Of

The objectives of this study were to estimate genetic parameters for agronomic and nutritive value traits for leaves and stems of Brachiaria humidicola progenies and to compare the selection using an additive index considering the agronomic traits alone or combined with the main nutritive value traits. Fifty progenies of the cross cv. BRS Tupi x H31 were evaluated. The experiment was arranged in a randomized block design with eight replications. The forage was cut seven times, at intervals of 30 - 35 days in the rainy season and two intervals of 60 days in the dry season. Trait variability among the progenies was confirmed. The mean progeny heritability ranged from 49.14% to 75.56% for the agronomic and from 19.59% to 71.11% for nutritive value traits. Nine of the ten best lines coincided in the selection for agronomic traits alone and in the selection including the main traits of nutritive value.

scholarly journals Comportamento de genótipos de maturação precoce de cana-de-açúcar na Zona da Mata de Pernambuco

2016 ◽  
Vol 7 (3) ◽  
pp. 311
Author(s):  
Aurélia Pietrina Costa Albuquerque ◽  
Gerson Quirino Bastos ◽  
João Andrade Dutra Filho ◽  
Djalma Euzébio Simões Neto ◽  
Leonam José Silva ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Block Design ◽  
Soluble Solids ◽  
Early Maturation ◽  
Commercial Cultivation ◽  
Randomized Block Design ◽  
Solids Content ◽  
High Possibility ◽  
Early Harvest ◽  
Selection Of

In sugarcane commercial cultivation the knowledge related to genotypes performance in different harvest seasons are essential for the identification of early genotypes which, when selected, will contribute to a significant increase in agroindustrial productivity. This study aimed to evaluate the agroindustrial performance of 26 sugarcane genotypes and to select genotypes that stood out for early maturation and a consequently early harvest. The experiments were conducted at ‘Olho D’gua’farm in the ‘Zona da Mata’ region, north of Pernambuco state. A randomized block design with four replications was used and the evaluated variables were: tons of pol per hectare (TPH), tons of sugarcane per hectare (TCH), fiber (FIB), adjusted pol% (PCC), soluble solids content (BRIX) and total recoverable sugar (ATR). The variance analysis and estimationof the genetic parameters were carried out, grouping the genotypes according to Scott-Knott´s test and a total economic analysis was realized. The average heritability for TPH and TCH indicates high possibility of success in the selection of early and highly productive genotypes. It was observed that the genotypes RB92579, RB867515, RB75126, RB942991, SP81-3250, RB93509, RB72454 and RB863129 presented better performance for an early harvest.

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