Genetic divergence on castor bean using the ward-mlm strategy

Oliveira, R. S. de; Silva, Simone Alves; Brasileiro, Bruno Portela; Medeiros, Everaldo S.; Anjos, Edijane Valéria Araújo dos

doi:10.1590/s1806-66902013000300019

Cited by 17 publications

(15 citation statements)

References 17 publications

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“…The Instituto Brasileiro de Geografia e Estatística (IBGE, 2015) declared 737kg ha -1 as the average national productivity of castor bean in August 2015, which was less than the average output reported by several authors, who recorded yields above 1500kg ha -1 in the Planalto Catarinense (VERISSIMO et al, 2009) (OLIVEIRA et al, 2013). Therefore, this poor national productivity level triggered the quest for assessment and selection techniques focused on raising the performance of this species.…”

Section: Introductionmentioning

confidence: 99%

Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

Silva

Almeida

et al. 2017

Cienc. Rural

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As castor bean (Ricinus communis L.) reveals immense adaptability to various ecological conditions and due to its socioeconomic significance, new studies have emerged primarily to develop more productive cultivars to suit different regions in Brazil. This study aimed to confirmthe correlations and direct and indirect effects of the morphoagronomic descriptors on castor bean productivity, employing correlation studies and track analysis. Between 2014 and 2015, experiments utilizing the randomized block design were performed, with four replications, which included 208 treatments involving pedigree and parental lines of castor bean, drawn from the germplasm bank of the Universidade Federal do Recôncavo da Bahia. Variables in the correlation analysis included primary racemic insertion, stem diameter, number of stem internodes, plant flowering, plant height, racemic length, number of fruits per raceme, fruit weight per raceme, seed yield per fruit and productivity. Correlations among the variables analyzed were imposed, via track analysis, on the direct and indirect influences of the morphoagronomic descriptors on productivity. The most direct and positively influential descriptors included fruit weight per raceme and number of seeds per raceme; the most direct albeit negatively influential descriptors are the number of internodes on the stem and flowering. Therefore, lines with less number of internodes and requiring fewer days to bloom are more highly productive. These descriptors can thus effectively identify the productive lines.

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Section: Introductionmentioning

confidence: 99%

Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

Silva

Almeida

et al. 2017

Cienc. Rural

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“…This has been proven in the studies on eucalyptus (Rocha et al, 2007), castor (Oliveira et al, 2013), and sugarcane (Lopes et al, 2014). However, despite the importance of using mixed models in the genetic divergence analysis, to date no research combining this analysis with Ward-MLM procedure has been reported.…”

Section: Introductionmentioning

confidence: 99%

Assessment of genetic divergence among coffee genotypes by Ward-MLM procedure in association with mixed models

et al. 2016

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ABSTRACT. Mixed linear models have been used for the analysis of the genetic diversity and provided further accurate results in crops such as eucalyptus, castor, and sugarcane. However, to date, research that combined this analysis with Ward-MLM procedure has not been reported. Therefore, the aim of the present study was to identify divergent coffee genotypes by Ward-MLM procedure, in association with the mixed-decision models. The experiment was initiated in February 2007, in the northwestern Rio de Janeiro State. The 25 evaluated genotypes were grown with a spacing of 2.5 x 0.8 m, in a randomized block design, with 5 replications, containing 8 plants each. The following agronomic traits were evaluated: plant height, stem diameter, plagiotropic branch number, and productivity. Four measurements were performed for each character from 2009 to 2012, between May and July. Data were analyzed using REML/BLUP analysis and Ward-MLM procedure. The Ward-MLM procedure in association with mixed linear models demonstrated the genetic variability among the studied coffee genotypes. We identified two groups of most divergent coffee genotypes, which can be combined by crossings and selections in order to obtain genotypes with high productivity and variability.

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“…These groups were 3, 4, 6, 7, 9, 10, and 12. Oliveira et al (2013) Early flowering is desired to reduce production losses. The lowest means were found in groups 10 and 21 at 50 and 52 days, respectively.…”

Section: Dendrogrammentioning

confidence: 99%

“…The lowest means were found in groups 10 and 21 at 50 and 52 days, respectively. Measurements obtained by Oliveira et al (2013) were between 89 and 92 days for an F3 population consisting of 259 castor bean genotypes in Recôncavo da Bahia. Lara, Zanotto, and Okita (2012) reported means ranging from 66 to 105 days for eight castor bean lines in the state of São Paulo.…”

Section: Dendrogrammentioning

confidence: 99%

“…Furtado et al (2014), in their study on yield and correlations in intercropped castor bean, found a significant positive correlation between bean yield and raceme length, number of fruits per raceme, and number of racemes per plant. Oliveira et al (2013) analyzed the genetic diversity of a segregating population of castor beans in Recôncavo da Bahia and reported that the most important descriptors were fruit weight per plant, bunch weight per plant, yield, bunch weight and number of seeds per plant.…”

Section: Dendrogrammentioning

confidence: 99%

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<b>Genetic divergence among castor bean lines and parental strains using ward’s method based on morpho-agronomic descriptors

Silva

Santos

et al. 2017

Acta Sci. Agron.

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ABSTRACT. This study sought to evaluate the genetic divergence among castor lines and parental strains in the germplasm bank at the Federal University of Recôncavo da Bahia (Universidade Federal do Recôncavo da Bahia) using morpho-agronomic descriptors. This experiment was conducted from 2014 to 2015 with 208 treatments represented by bank accessions that were analyzed using a randomized block design, which established homogeneity of the experimental conditions with all treatments repeated in four blocks. The genetic divergence analysis was performed using Ward's method and Tocher's method based on Gower's distance, which are two clustering methods used in studies with castor beans, with the help of the statistical programs R and GENES. The results revealed the formation of 21 groups for 13 morphoagronomic descriptors, six qualitative and seven quantitative, indicating the presence of variability in the bank. The groups containing promising accessions for the characteristics of agronomic interest, including precociousness, fruit dehiscence, and plant height and yield were 2, 7, 8, 10, 14, 15, 16, and 17, which suggested potential hybrid crosses. The descriptors with the greatest contribution to variance were yield, plant height, the number of seeds per raceme, flowering and seed weight per raceme.Keywords: Ricinus communis L., multivariate, variability.Divergência genética entre linhagens e parentais de mamoneira pelo método Ward, baseada em descritores morfoagronômicos RESUMO. Este trabalho objetivou avaliar a divergência genética entre linhagens e parentais de mamoneira do Banco de germoplasma da Universidade Federal do Recôncavo da Bahia, por meio de descritores morfoagronômicos. O experimento foi conduzido no período de 2014 a 2015, com 208 tratamentos representados pelos acessos do Banco, avaliados no delineamento em blocos casualizados, estabelecendo a homogeneidade das condições experimentais com todos os tratamentos igualmente repetidos em quatro blocos. A análise de divergência genética foi realizada pelo método Ward e pelo o método de Tocher por meio da distância de Gower, sendo esses métodos de agrupamento utilizados em estudos com mamoneira, com o auxílio dos programas estatísticos R e GENES. Os resultados revelam a formação de 21 grupos para 13 descritores morfoagronômicos, sendo seis qualitativos e sete quantitativos, indicando a presença de variabilidade no Banco. Os grupos que apresentam acessos promissores para as características de interesse agronômico como precocidade, deiscência dos frutos, estatura e produtividade, são 2, 7, 8, 10, 14, 15, 16 e 17, sugerindo possíveis cruzamentos entre estes. Os descritores que mais contribuem para a divergência são produtividade, estatura da planta, número de sementes por racemo, florescimento e peso de sementes por racemo.Palavras-chave: Ricinus communis L., multivariada, variabilidade.

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Genetic divergence on castor bean using the ward-mlm strategy

Cited by 17 publications

References 17 publications

Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

Assessment of genetic divergence among coffee genotypes by Ward-MLM procedure in association with mixed models

<b>Genetic divergence among castor bean lines and parental strains using ward’s method based on morpho-agronomic descriptors

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