Genetic divergence among cupuaçu accessions by multiscale bootstrap resampling

Santos, Vinicius Silva dos; Filho, Sebastião Martins; Alves, R. N. B.; Resende, Marcos Deon Vilela de; Silva, Fabyano Fonseca e

doi:10.1590/1678-4499.0431

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…The UPGMA coupled to the Mojena's criterion, despite the high AER (14.3%), was more sensitive to differentiate the genotypes, forming 11 clusters compared to the 5 ones of the Tocher's method (AER = 5.1%). Similar results were obtained by Rotili et al (2012) and Rigon et al (2015), for the evaluation of corn genotypes, and by Santos et al (2015), for cowpea, confirming the practicality and effectiveness of the method. The UPGMA method clustered the hybrid AG 1051 and the Cativerde 02 variety (control) separately in C I and C IX, respectively.…”

Section: Resultssupporting

confidence: 83%

“…On the other hand, the commercial hybrid AG 1051 remained isolated from the genotypes, confirming the high genetic diversity of this genotype in relation to the half-sib progeny analyzed (Table 4). Other studies about genetic divergence by Rigon et al (2015), Santos et al (2015) and Gouvêa et al (2010), using the Tocher's optimization method, reported similar cluster pattern results for corn hybrids, cupuaçu access and rubber tree genotypes, respectively.…”

Section: Resultsmentioning

confidence: 53%

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Genetic dissimilarity and definition of recombination clusters among green corn half-sib progenies

et al. 2016

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AbstrAct:The present study aimed to estimate the genetic divergence among corn half-sib progenies seeking to direct recombination between contrasting and superior progenies for green corn production. Ninety-six progenies were evaluated in a randomized block design with 3 replications, and 18 characteristics associated with agronomic adaptation and green corn yield were measured. The genetic divergence was estimated using The grouping allowed to identify superior and contrasting progenies for green corn production. The recombination of these progenies allows increasing genetic variability and the frequency of alleles favorable to the green corn production.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 53%

Genetic dissimilarity and definition of recombination clusters among green corn half-sib progenies

et al. 2016

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“…Santos et al (2005) found low genetic diversity among 30 cocoa clones based on the RAPD markers and genealogy information, which can also be attributed to the strong genetic relation among most of the studied materials. Studies of cupuassu diversity based on phenotypic data were performed by Araújo et al (2002), Maia et al (2011), andSantos et al (2015), among others, and obtained a reasonable phenotypic divergence, with the number of groups varying between two and seven, according to several grouping methods.…”

Section: Discussionmentioning

confidence: 99%

Phenotypic and genotypic characterization and compatibility among genotypes to select elite clones of cupuassu

Alves¹,

Silva²,

Albuquerque³

et al. 2017

Acta Amaz.

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The expansion of the genetic base of cultivated materials is an ongoing activity of the cupuassu (Theobroma grandiflorum) breeding program. However, the parents involved need to be genotypically and phenotypically characterized to ensure compatibility of crossings, as well as to assist in the selection of more promising individuals for hybridization. This study aimed to identify and select T. grandiflorum clones that are compatible and genetically divergent using tools such as the estimates of genotypic, phenotypic, and combined distances, as well as the compatibility rates among clones. The genetic distance analysis of the clones was performed with 14 heterologous microsatellite primers of cocoa (Theobroma cacao) that amplify the DNA of cupuassu. Phenotypic characterization was based on 14 variables related to fruit production. The joint dissimilarity matrix was obtained by means of the sum of the phenotypic and molecular dissimilarity matrices. The intra-and inter-clonal compatibility was estimated through controlled crossings. A low correlation was noted between the dissimilarity matrices based on the molecular and agronomic data. As for compatibility, all clones were self-incompatible, with different compatibility rates when crossed. The compatibility index was strongly influenced by the degree of relationship of the clones. It was possible to identify and select the most promising sets of cupuassu clones to be used in breeding programs, despite their genetic relationship. KEYWORDS: microsatellites, tropical fruit, diversity, plant breeding, Theobroma grandiflorum Caracterização fenotípica, genotípica e compatibilidade entre genótipos para seleção de clones elite de cupuaçuzeiro RESUMO A ampliação da base genética dos materiais de cultivo é trabalho contínuo do programa de melhoramento genético do cupuaçuzeiro (Theobroma grandiflorum). Há necessidade, entretanto, que os parentais envolvidos estejam caracterizados fenotípica e genotipicamente, para auxiliar na escolha dos indivíduos que serão hibridizados, bem como para garantir os mecanismos de rastreabilidade e proteção das cultivares. Este estudo teve como objetivo identificar e selecionar clones de cupuaçuzeiro inter-compatíveis e geneticamente divergentes, utilizando como ferramentas as distâncias genotípica, fenotípica e combinada mistas, assim como as taxas de compatibilidade entre os clones. Estimativas das distâncias genéticas entre os clones foram realizadas com base em 14 iniciadores microssatélites heterólogos de cacaueiro (Theobroma cacao) que amplificam o DNA do cupuaçuzeiro. Para a caracterização fenotípica foram empregadas 14 variáveis relacionadas à produção de frutos. A matriz de dissimilaridade conjunta foi obtida por meio da soma das matrizes de dissimilaridade fenotípica e molecular. A compatibilidade intra e inter-clonal foi estimada através de cruzamentos controlados. Houve uma baixa correlação entre as matrizes de dissimilaridade com base nos dados moleculares e agronômicos. Quanto à compatibilidade, todos os clones foram auto-...

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“…In cupuassu tree, the vegetative propagation of genetically superior matrices identified by their productive performance allows the full use of heterosis (Regazzi et al 2002). Therefore, studies on preliminary compatibility and grouping should be performed in the initial crossings, such as those performed by Santos et al (2015).…”

Section: Discussionmentioning

confidence: 99%

Simultaneous selection of cupuassu tree and Brazilian mahogany genotypes in an agroforestry system in Pará state, Brazil

et al. 2020

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This study aimed to evaluate and select progenies and matrices of cupuassu-tree siblings, and to select Brazilian mahogany matrices with superior characteristics to be used in agroforestry systems (AFS). Twenty-five full cupuassu tree sibling progenies and one Brazilian mahogany half-sibling progeny were evaluated. The study was conducted for 14 years in a commercial property in Tomé Açu, Pará State, Brazil. The number of fruits and fruit yield per plant, as well as the rate of plants with symptoms of witches’ broom disease, were used as response variables for cupuassu. For mahogany, the following response variables were used: total height, commercial height, crown height, diameter at breast height and commercial wood volume. There were five cupuassu tree progenies with interesting characteristics to be used in AFS. Based on the high values observed in the selection accuracy and heritabilities, a good potential for the selection of promising individuals in the cupuassu tree population is inferred. Based on the ranking of genotypic values and their agronomic performance, 10 matrices of cupuassu tree were selected. For Brazilian mahogany, three matrices showed excellent silvicultural performance. The matrices of these two species should be propagated vegetatively in order to evaluate clonal tests.

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Genetic divergence among cupuaçu accessions by multiscale bootstrap resampling

Cited by 4 publications

References 19 publications

Genetic dissimilarity and definition of recombination clusters among green corn half-sib progenies

Genetic dissimilarity and definition of recombination clusters among green corn half-sib progenies

Phenotypic and genotypic characterization and compatibility among genotypes to select elite clones of cupuassu

Simultaneous selection of cupuassu tree and Brazilian mahogany genotypes in an agroforestry system in Pará state, Brazil

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