Divergência Genética Entre Cultivares De Mandioca Por Meio De Estatística Multivariada

Gonçalves‐Vidigal, Maria Celeste; Filho, Pedro Soares Vidigal; Júnior, Antônio Teixeira do Amaral; Braccini, Alessandro de Lucca e

doi:10.1590/s0006-87051997000200005

Cited by 12 publications

(9 citation statements)

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“…Several studies report the use of multivariate techniques to determine genetic diversity (Vidigal et al 1997, Peroni et al 1999, Carvalho et al 2003, Araújo et al 2002, Sudré et al 2005 The purpose of this study was to quantify the genetic dissimilarity in 15 cassava clones by multivariate techniques, to identify the most promising ones for later hybridizations.…”

Section: Genetic Dissimilarity In Cassava Clones Determined By Multivmentioning

confidence: 99%

Genetic dissimilarity in cassava clones determined by multivariate techniques

Nick¹,

Carvalho²,

Assis³

et al. 2008

CBAB

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Section: Genetic Dissimilarity In Cassava Clones Determined By Multivmentioning

confidence: 99%

Genetic dissimilarity in cassava clones determined by multivariate techniques

Nick¹,

Carvalho²,

Assis³

et al. 2008

CBAB

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“…A avaliação da divergência genética, como critério para a escolha de genitores em programas de melhoramento, foi relatada por diversos autores a exemplo de Maluf et al (1983), Miranda et al (1988), Dias & Kageyama (1997), Vidigal et al (1997), Ribeiro et al (1999) e Ferrão et al (2002. Em relação à mamona, poucos estudos têm sido desenvolvidos quanto à divergência genética.…”

Section: Introductionunclassified

Divergência genética entre acessos e cultivares de mamoneira por meio de estatística multivariada

Costa

Pereira

Bruno

et al. 2006

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a divergência genética entre acessos e cultivares de mamoneira (Ricinus communis L.) e utilizá-la como critério na escolha de genitores que viabilizem, a partir de hibridações, a formação de populações segregantes. Os tratamentos foram representados pelos acessos BRA 4871, BRA 2968, BRA 5550 e BRA 7722 Papo-de-gia, e as cultivares BRS 188 Paraguaçu, BRS 149 Nordestina, IAC-80, Mirante-10 e Pernambucana Melhorada. As características analisadas foram: início do florescimento (FR), número de racemos por planta (NRP), comprimento efetivo do racemo primário (CR), altura de planta (AP), potencial produtivo (PP) e teor de óleo nas sementes (TO). A divergência genética foi estimada por meio de estatística multivariada, com base em variáveis canônicas e análise de agrupamento, tendo-se empregado a distância euclidiana média. Houve a formação de dois grupos: o grupo I formado por oito genótipos e o grupo II por apenas um genótipo, a cultivar Mirante-10. Apesar de a cultivar Mirante-10 ter sido a mais divergente, não deve ser recomendada para hibridação, por sua baixa média de desempenho. As demais cultivares também apresentam restrições para hibridação, por serem bastante similares. As variáveis que mais contribuíram para a divergência genética foram FR, AP, TO e CR.Termos para indexação: Ricinus communis, variação genética, agrupamento, análise multivariada. Genetic divergence on castor bean accesses and cultivars through multivariate analysisAbstract -This work aimed to evaluate genetic divergence among castor bean (Ricinus communis L.) cultivars, in order to enable the choice of parents which make the formation of segregating populations possible. Accesses BRA 4871, BRA 2968, BRA 5550 and BRA 7722 Papo-de-gia, and cultivars BRS 188 Paraguaçu, BRS 149 Nordestina, IAC-80, Mirante-10 and Pernambucana Melhorada were evaluated. Characteristics analyzed were: days to flowering, number of racemes per plant, length of pistillate region of main raceme, plant height, potential yield, and seed oil content. The genetic divergence among accesses and cultivars was studied by multivariate analysis techniques, with canonical variables and cluster analysis, making use of mean euclidean distance. Two groups were formed: group I, formed by eight genotypes; and group II, formed by one genotype, cultivar Mirante-10. In spite of being the more divergent, cultivar Mirante-10 should not be recommended for hybridization due to its low medium performance. The other cultivars also presented restrictions, as they were quite similar. The variables that more contributed to the genetic divergence were: days to flowering, length of pistillate region of main raceme, plant height, and seed oil content.

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“…By being a unifying analysis, these procedures allow integrating much information extracted from the object of study, proving to be very suitable when there is a high number of accessions (Vidigal et al, 1997;Silva, 2013). This analysis can be complemented by grouping methods as Tocher's optimization and unweighted pair group method using the arithmetic average (UPGMA), whose function is to group the accessions based on its similarities.…”

Section: Introductionmentioning

confidence: 99%

Research Article Morphological diversity of cassava accessions of the south-central mesoregion of the State of Mato Grosso, Brazil.

Zago¹,

Barelli²,

Hoogerheide³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. Genetic variability of cassava (Manihot esculenta Crantz) in Brazil is wide, being this the result of natural and cultural selection during pre-and post-domestication of the species in different environments. Given the number of species of the genus found in the region (38 of a total of 98 species), the central region of Brazil was defined as the primary center of cassava diversity. Therefore, genetic diversity characterization of cassava accessions is fundamental, both for farmers and for plant breeders, because it allows the organization of genetic resources and better utilization of available genetic diversity. This research aims to assess genetic divergence of cassava accessions from the south-central region of the State of Mato Grosso, based on multi-categorical morphological traits. For this purpose, 38 qualitative and quantitative morphological descriptors were used. Genetic diversity was expressed by the genetic similarity index, with subsequent clustering of accessions by the modified Tocher's procedure and UPGMA. Of 38 descriptors, only growth habit of stem showed no variability. Tocher and UPGMA methods were efficient and corroborated on group composition. Both methods were able to group accessions of different localities in distinct group consistency.

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Divergência Genética Entre Cultivares De Mandioca Por Meio De Estatística Multivariada

Cited by 12 publications

References 1 publication

Genetic dissimilarity in cassava clones determined by multivariate techniques

Genetic dissimilarity in cassava clones determined by multivariate techniques

Divergência genética entre acessos e cultivares de mamoneira por meio de estatística multivariada

Research Article Morphological diversity of cassava accessions of the south-central mesoregion of the State of Mato Grosso, Brazil.

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