Genetic diversity in accessions of melon belonging to momordica group

Valadares, Ricardo N; Melo, Roberto A; Sarinho, Isabel Vf; Oliveira, Natália Souza; Rocha, Fernando At; Silva, José W; Menezes, Dimas

doi:10.1590/s0102-053620180218

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…Nevertheless, it was considered a relevant attribute and cannot be eliminated because this would change group distribution. Valadares et al (2018) studied genetic divergence in melon accessions belonging to the Momordica group and found that TSS was one of the traits that accounted most for the divergence (17.60%), corroborating with results presented.…”

Section: Resultssupporting

confidence: 86%

“…The use of different clustering methods results in greater efficiency in determining genetic diversity (Valadares et al, 2018). Thus, a third methodology was applied in order to guarantee genetic variability between melon accessions (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

“…Analysis of the relative contribution of traits using Singh's method (1981) considers that the most variable traits are essential, making it possible to exclude traits that contributed little to dissimilarity, reducing the work, time and additional costs involved in data collection (Alves et al, 2003;Valadares et al, 2018). All the assessed traits contributed to determining the genetic divergence between accessions, to a greater or lesser degree.…”

Section: Resultsmentioning

confidence: 99%

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Genetic dissimilarity, selection index and correlation estimation in a melon germplasm

et al. 2021

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The success of breeding programs depends on genetic variability. Individuals selected based on a few traits may be a limitation. One alternative is the use of nonparametric indices. However, there is no information on the use of selection indices in melon germplasms. The present study aimed to estimate genetic dissimilarity in a melon germplasm and select potential parent plants for future breeding programs. The genetic material consisted of 37 melon accessions. The traits assessed were fruit diameter and length, diameter and length of the fruit cavity and total soluble solids. Genetic dissimilarity was assessed by multivariate analyses (UPGMA and Tocher). Selection gain estimates were analyzed by comparing the classic Smith-Hazel and sum of ranks indices. Genetic diversity was observed between accessions. The variable that contributed most to genetic dissimilarity was fruit cavity length. Simultaneous selection for the traits assessed based on the sum of ranks index is better suited to melon germplasm assessment. The best accessions for the five variables simultaneously were UFU07, UFU23, UFU09, UFU21, UFU28 and UFU30.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Genetic dissimilarity, selection index and correlation estimation in a melon germplasm

et al. 2021

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Morpho-agronomic diversity and botanical identification of melon accessions from northeastern Brazil

et al. 2023

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Melon (Cucumis melo L.) crops are grown in the Semiarid region of Brazil by small, medium, and large farmers, focused on domestic and international markets. However, melon is also grown by family farmers using their own seeds, which are important germplasm for melon breeding programs. Samples of these seeds were collected and stored in the Active Germplasm Bank of Cucurbitaceae from the Northeast Region at the Brazilian Agricultural Research Corporation (Embrapa Semiarid), and require more thorough studies for a better understanding of the existing variability. Thus, the objective of this work was to characterize sub-accessions and their respective endogamic progenies to assess the genetic variability between and among these accessions. Two experiments were conducted in a randomized complete block design, with three replications, using 11 quantitative and 8 qualitative descriptors: the first using seeds from 17 accessions from natural pollination, and the second using seeds from S1 progenies. Morphological data were used for comparisons between generations. The 17 accessions evaluated originated 24 sub-accessions, denoting variability between and among accessions and sub-accessions. A dendrogram developed based on the Unweighted Pair Group Method with Arithmetic Mean (UPGMA) showed the existing variability and, according to the newest melon classification, the groups identified were: makuwa, subgroup nashi-uri; and momordica and cantalupensis, subgroup prescott. The results showed a probable existence of introgression of alleles between different botanical groups, and some sub-accessions were not identified regarding their group by presenting variations in morphological characteristics, indicating the presence of new botanical groups.

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Genetic diversity in accessions of melon belonging to momordica group

Cited by 2 publications

References 11 publications

Genetic dissimilarity, selection index and correlation estimation in a melon germplasm

Genetic dissimilarity, selection index and correlation estimation in a melon germplasm

Morpho-agronomic diversity and botanical identification of melon accessions from northeastern Brazil

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