Adaptability, stability, and genetic divergence of conilon coffee in Alto Suaçuí, Minas Gerais, Brazil

Silva, Vânia Aparecida; Machado, Janaine Lopes; Rezende, Juliana Costa de; Oliveira, Alexandrino Lopes de; Figueiredo, Ulisses José de; Carvalho, Gladyston Rodrigues; Ferrão, Maria Amélia Gava; Guimarães, Rubens José

doi:10.1590/1984-70332017v17n1a4

Cited by 15 publications

(14 citation statements)

References 17 publications

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“…Therefore, together with the analysis of the performance of the accessions, studies on genetic divergence are of great importance for improvement programs because they assess variability among accessions (Silva et al, 2017) and provide information for the identification of mother plants that can be used in crosses with a higher probability of obtaining superior progeny in the segregating generations. Genetic diversity may be studied using various methods such as the use of molecular markers (Almeida et al, 2011), the coefficient of parentage (Costa e Silva et al, 2014), and multivariate analysis (Assis et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity among accessions of acerola based on the quality of fruits

et al. 2018

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Knowledge of the quality of fruits and the genetic variability among genotypes of acerola is important to optimize the use of genetic resources in improvement programs. The objective of the present study was to assess physico-chemical characteristics to determine genetic divergence among 24 genotypes of acerola. Sixty ripe fruits were collected per plant in a commercial orchard in the municipality of Jequitibá-MG. They were assessed in two production seasons with regard to their physical, chemical, and physico-chemical characteristics. Multivariate analysis of the genetic divergence among the genotypes was performed using principal component analysis, Tocher’s clustering method, and the nearest-neighbor hierarchical method, using the standardized mean Euclidean distance as the measure of dissimilarity. Genotypes 13, 20, and 23 exhibited means that were higher than the overall mean values for the main characteristics (fruit mass, ratio, and vitamin C content). Genotypes 3, 6, 8, 21, and 24 stood out with regard to fruit mass and ratio, i.e., they were larger and sweeter. Genotype 16 stood out with regard to fruit mass and vitamin C content. Results obtained using the methods were comparable, and the methods were effective in discriminating between the genotypes. This indicated variability, with potential for use in improvement programs. Based on the mean values for the chemical and physical characteristics of fruits and considering the genetic divergence among the genotypes, it was possible to suggested nine crosses to generate a future improved population, namely between genotype 11 and genotypes 3, 6, 8, 13, 16, 20, 21, 23, and 24.

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Section: Introductionmentioning

confidence: 99%

Genetic diversity among accessions of acerola based on the quality of fruits

et al. 2018

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“…The existence of genetic variability and selective potential among the conilon coffee genotypes was also demonstrated in other studies of genetic divergence through multivariate techniques using the mixed model method employed in populations of conilon (Silva et al 2017, Oliveira et al 2018. Ferrão et al (2017) recommend that "Conilon" clonal coffee cultivars be made up of a combination of at least eight different genotypes, although new clonal varieties have been developed by grouping nine to 14 genotypes.…”

Section: Discussionmentioning

confidence: 89%

“…Expressive demands for production technologies of this species in these specific areas are highly needed, especially regarding the availability of cultivars adapted to the heat (Silva et al 2017), as well as tolerance to diseases and pests. Aiming to the development of a cultivar adapted to these conditions, we selected conilon clones according to genetic parameters for tolerance to pests and diseases under irrigated systems and without the use of pesticides.…”

Section: Introductionmentioning

confidence: 99%

Selection of conilon coffee clones tolerant to pests and diseases in Minas Gerais

Silva

Abrahão

Lima

et al. 2019

Crop Breed. Appl. Biotechnol.

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In the northern Minas region, the dry-warm climate predisposes coffee plants to the occurrence of leaf miners, mites, cercosporiosis, and leaf scald. Aiming for the development of a cultivar adapted to these conditions, Coffea canephora Pierre ex A. Froehner clones were selected through genetic parameters under an irrigated system, without agrochemicals. Eighteen agronomic traits were evaluated. The survival rate, number of nodes per plagiotropic branch, leaf miner infestation and cercosporiosis incidence were chosen as characteristics for selection of 'Vitória Incaper 8142', once they have shown superiority of the genetic parameters. The survival rate variable was used to rank the EMCAPA 8141 Robustão Capixaba clones. Clones V2, V4, V6, V13, RC7, and RC9 were selected as more tolerant to pests and diseases and can provide genetic improvements in conilon breeding program for region. The genetic dissimilarity identified between clones allowed suitable clone combinations to be proposed for use in future crosses.

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“…Characterization of C. canephora genotypes should consider both superior performance and maintenance of superiority over time (Silva et al, 2017). Although the effect of the genotype × year interaction was significant, except for SIEV, the repeatability estimates of the traits evaluated indicate the predominance of simple interaction (Resende; Duarte, 2007) (Table1).…”

Section: Resultsmentioning

confidence: 99%

CONTRIBUTION OFAGRONOMIC TRAITS TO THE YIELD OF Coffea canephora PIERRE EX A. FROEHNER HULLED COFFEE

Spinelli

Moraes

Alves

et al. 2018

C.Sci.

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The evaluation of morphological characters related to the hulled coffee yield subsidizes the selection of <em>Coffea canephora</em> plants that combine a set of favorable traits. The aim of this study was to evaluate the direct and indirect effects of agronomic traits on the production of hulled coffee to subside the plant selection. To this, nine morphological descriptors were evaluated of 130 clones of the botanical varieties Conilon and Robusta over two crop years in the experimental field of Embrapa, in the municipality of Ouro Preto do Oeste, state of Rondônia (RO). To quantify the genetic variability the path analysis and the Scott Knott cluster test were used. The effect of genotype x year interaction was significant for eight of the nine characteristics analyzed. The genotypes were clustered in three to five classes, subsidizing the establishment of a scale to evaluate the variability of this genetic resource. Pathway analysis indicated that the number of plagiotropic branches and the number of rosettes per productive branch were the traits that exhibited the greatest direct effect on hulled coffee yield. These results show that it is possible to select plants with complementarity traits which favor a higher production of hulled coffee.

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Adaptability, stability, and genetic divergence of conilon coffee in Alto Suaçuí, Minas Gerais, Brazil

Cited by 15 publications

References 17 publications

Genetic diversity among accessions of acerola based on the quality of fruits

Genetic diversity among accessions of acerola based on the quality of fruits

Selection of conilon coffee clones tolerant to pests and diseases in Minas Gerais

CONTRIBUTION OFAGRONOMIC TRAITS TO THE YIELD OF Coffea canephora PIERRE EX A. FROEHNER HULLED COFFEE

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