Divergência genética e importância de caracteres morfológicos em genótipos de couve

Azevedo, Alcinei Místico; Júnior, Valter Carvalho de Andrade; Fernandes, José Sebastião Cunha; Pedrosa, Carlos Enrrik; Valadares, Nermy Ribeiro; Ferreira, Marcos Am; Martins, Rafael Av

doi:10.1590/s0102-05362014000100008

Cited by 15 publications

(11 citation statements)

References 20 publications

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“…This occurs because the clustering is influenced by the distance between the progenies, which considers the largest one among the smallest distances found in the dissimilarity matrix. Azevedo et al (2014), while studying the divergence among cabbage parents, also observed a predominance of genotypes in one group (77%) and the formation of groups with only one genotype, when using the Tocher method. The authors pointed out that, although there are genotypes with great genetic divergence among them, the clustering of most genotypes in one group highlights the similarity between genotypes, which, according to Silva et al (2011), refers to a narrow genetic base.…”

Section: Resultsmentioning

confidence: 90%

Genetic divergence between passion fruit hybrids and reciprocals based on seedling emergence and vigor

Rosado

Cremasco

et al. 2017

J. Seed Sci.

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-Characteristics related to seed quality have been rarely used in studies on the genetic diversity of passion fruit. The purpose of this study was to evaluate the genetic diversity between progenies constituted by hybrids and reciprocals, based on seed emergence and vigor traits. On the 28th day, emergence percentage, emergence speed index, shoot length, root length and total length of seedling; dry weight, number of normal seedlings and 100-seed weight were evaluated in a completely randomized design experiment with 20 progenies (hybrids and reciprocals) and four replications (50 seeds). Genetic diversity was determined using the Tocher optimization clustering methods and the unweighted pair group method, based on the Mahalanobis distance, as well as evaluating the relative contribution of the traits to genetic divergence and the correlation network, according to the relations between groups of quality, length and mass variables. The most contributing variable to genetic divergence was the total length of seedlings, the reciprocal effect did not present a consistent pattern in the studied hybrid combinations.Index terms: Passiflora edulis Sims, cytoplasmic effects, biometry.Divergência genética entre híbridos e recíprocos de maracujazeiro azedo com base em características de emergência e vigor RESUMO -Características relacionadas à qualidade de sementes tem sido pouco utilizada em estudos sobre diversidade genética em maracujazeiro. O objetivo deste estudo foi avaliar a diversidade genética entre progênies constituídas por híbridos e recíprocos com base em características de emergência e vigor das sementes. Foram avaliadas: porcentagem de emergência, índice de velocidade de emergência, comprimento total da plântula, comprimento da parte aérea, comprimento da raiz primária, massa seca de parte aérea, número de plântulas normais e peso de 100 sementes. O experimento foi em delineamento inteiramente casualizado, com 20 progênies (híbridos e recíprocos) e quatro repetições de 50 sementes. A diversidade genética foi determinada através dos métodos de agrupamento de otimização de Tocher e da ligação média não ponderada entre grupos, baseada na distância de Mahalanobis, além de avaliar a contribuição relativa dos caracteres para a divergência genética e a rede de correlações de acordo com as relações entre os grupos de variável qualidade, comprimento e massa. A variável que mais contribuiu para a divergência genética foi o comprimento total da plântula, sendo que o efeito recíproco não apresentou padrão consistente nas combinações híbridas estudadas.Termos para indexação: Passiflora edulis Sims, efeito citoplasmático, biometria.1

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Section: Resultsmentioning

confidence: 90%

Genetic divergence between passion fruit hybrids and reciprocals based on seedling emergence and vigor

Rosado

Cremasco

et al. 2017

J. Seed Sci.

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“…This allows the technique to be an appropriate procedure for grouping the genotypes based on morphoagronomic characters, since there is no requirement for calibration [22] without the need for information on experimental designs and genealogies, which in some situations is unknown . The high divergence observed in the matrix of dissimilarity (Fig 2) and the dispersion of the families in the graphical representation ( Fig 5) is indicative of genetic variability in the population, which points out its potential for genetic improvement [8]. Significant genetic gains with selection are conditioned by the existence of such genetic variability [23].…”

Section: Discussionmentioning

confidence: 95%

Self-organized map: the new aproach for study of genetic divergence in kale

Brito

Júnior

Azevedo

et al. 2020

Preprint

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The objective of this study was to study the genetic divergence between genotypes of kale, to propose a methodology for the use of neural networks of the SOM type and to test its efficiency through Anderson's discriminant analysis. We evaluated 33 families of half-siblings of kale and three commercial cultivars. The design was a randomized block with four replications with six plants per plot. A total of 14 plant-level quantitative traits were evaluated. Genetic values were predicted at family level via REML / BLUP. For the study of divergence, neural networks of the SOM type (Selforganizing Map) were adopted. We evaluated different network architectures, whose consistencies of the clusters were identified by the Anderson discriminant analysis and by the number of empty clusters. After selecting the best network configuration, a dissimilarity matrix was obtained, from which a dendrogram was constructed using the UPGMA method. The best network architecture was formed with five rows and one column, totaling five neurons and consequently five clusters. The greatest dissimilarity was established between clusters I and V. The crossing between the genotypes of cluster I and those belonging to clusters III and V are the most recommended, since they aim to recombine families with characteristics of interest to the improvement and high dissimilarity. Anderson's discriminant analysis showed that the genotype classification was 100% correct, indicating the efficiency of the methodology used. Map (SOM) neural networks are a type of exploratory multivariate analysis tool that allows, through artificial computational intelligence, to design high-dimensional data in a smaller dimensional space, without loss of information [12]. This new organization prioritizes maintaining the structure, such as clusters and information relationships [13]. This reinforces its constant use in several

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“…acephala) é uma cultura bastante apreciada no Brasil. Seu consumo tem aumentado, em virtude das novas formas de sua utilização na culinária e das recentes descobertas quanto às suas propriedades nutracêuticas (Azevedo et al, 2014). A despeito de sua popularidade, a cultura da couve-folha é pouco enfocada em trabalhos na literatura especializada na produção hidropônica, mesmo em consulta às bases internacionais.…”

Section: Introductionunclassified

Formas De Aproveitamento De Águas Salobras Em Hidroponia Para a Produção De Couve-Folha

Cerqueira¹,

Oliveira²,

Damasceno³

et al. 2017

Anais Do IV Inovagri International Meeting - 2017

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RESUMO:Objetivou-se com esse estudo avaliar dois tipos de emprego de águas salobras para produção de couve-folha em hidroponia, quais sejam: usar águas salobras para o preparo da solução nutritiva (SN) e reposição do volume evapotranspirado pela cultura (ETc) (Experimento I) e usar águas salobras para o preparo da SN e água doce para repor a ETc de couve-folha (massa de matéria fresca das folhas), no entanto, quando se fez uso exclusivo de águas salobras (Experimento I), houve incremento na produção de couve-folha utilizandose água com condutividade elétrica de até 2 dS m -1 . Por outro lado, para o Experimento II houve redução na produção de 9,5 % para cada aumento unitário da CEa. Utilizar águas salobras de forma exclusiva para o cultivo de couve-folha em hidroponia é mais vantajoso, uma vez que houve incremento na produção e a água doce disponível poderá ser economizada para outros fins. PALAVRAS-CHAVE: Brassica oleracea var. acephala, condutividade elétrica, irrigação WAYS FOR THE USE OF SALT WATERS IN HYDROPONY TO PRODUCE CABBAGEABSTRACT: The objective of this study was to evaluate two types of brackish water use for cabbage leaf production in hydroponics, namely: using brackish water for the preparation of the nutrient solution (SN) and replacement of the evapotranspiration volume (ETc) I) and using 1 Doutoranda em Engenharia Agrícola, UFRB, Caixa Postal 118, CEP 44380-000, Cruz das Almas, BA. Fone (75) 9113-5539.

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Divergência genética e importância de caracteres morfológicos em genótipos de couve

Cited by 15 publications

References 20 publications

Genetic divergence between passion fruit hybrids and reciprocals based on seedling emergence and vigor

Genetic divergence between passion fruit hybrids and reciprocals based on seedling emergence and vigor

Self-organized map: the new aproach for study of genetic divergence in kale

Formas De Aproveitamento De Águas Salobras Em Hidroponia Para a Produção De Couve-Folha

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