Caracterização molecular de acessos de melão coletados no nordeste brasileiro

Dantas, Ana Carolina de Assis; Nunes, Glauber Henrique de Sousa; Araújo, Ioná Santos; Albuquerque, Leidiane Bezerra

doi:10.1590/s0100-29452012000100025

Cited by 10 publications

(11 citation statements)

References 6 publications

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“…The organization and maintenance of species genetic resources, considering the activities of collection, characterization and conservation, are essential to sustain the genetic basis of genetic improvement programs (Silva, Moura, Neto-Farias, Ledo, & Sampaio, 2017). Characterization is a vital activity to generate knowledge about germplasm, preserved in bases or collections, for providing better management of accessions and subsidizing their conservation and preservation, as well as for the use in genetic improvement programs (Dantas, Nunes, Araújo, & Albuquerque, 2012). It can be carried out aided by botanic, morphological and agronomic descriptors, which can be either quantitative or qualitative (Veiga & Queiróz, 2015).…”

Section: Introductionmentioning

confidence: 99%

Selection of Morphoagronomic Descriptors in Physalis angulata L. Using Multivariate Techniques

Silva¹,

Passos²,

Schnadelbach³

et al. 2018

JAS

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This study aimed at selecting determinant morphoagronomic descriptors to characterize and evaluate Physalis angulata L. germplasm. Twelve quantitative and twenty-two qualitative descriptors were analyzed in six accessions of P. angulata coming from the physalis germplasm collection belonging to the State University of Feira de Santana-BA. The selection and discharge of quantitative descriptors was based on the direct selection and on the Singh method, while qualitative descriptors were analyzed through entropy. The statistic analyses were carried out using the GENES and R programs. Ten quantitative descriptors were excluded through direct selection and five through the Singh method. However, only four descriptors were considered redundant by both methods: east-west fruit, weight of five ripe fruits, width of leaf blade and total soluble solids. Although the total soluble solids descriptor was appointed for discharge, it was included in the group of descriptors selected due to its importance in the characterization of physalis fruit. The list of minimum descriptors to describe physalis accessions comprised 15 descriptors: plant height, stem diameter, north-south fruits, number of fruits per plant, leaf blade length, internode length, fruit longitudinal length, fruit transversal length, total soluble solids, growth habit, stem color, leaf margin shape, unripe calyx color, unripe fruit shape and color. These were nine quantitive and six qualitative descriptors, respectively. The discharge of 55.88% of the descriptors did not cause significant loss of information and might allow the reduction of time and resources spent to characterize and evaluate physalis germplasm.

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Section: Introductionmentioning

confidence: 99%

Selection of Morphoagronomic Descriptors in Physalis angulata L. Using Multivariate Techniques

Silva¹,

Passos²,

Schnadelbach³

et al. 2018

JAS

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“…Inter-simple sequence repeat (ISSR) markers may be useful for detecting molecular polymorphisms in improved and non-improved passion fruit germplasms (Costa et al 2012) if they are able to generate highly reproducible results and produce an abundance of polymorphic fragments to identify intraspecific and interspecific variabilities (Dantas et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Cytogenetic characterization of the Passiflora edulis Sims × Passiflora cincinnata Mast. interspecific hybrid and its parents

et al. 2016

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The genus Passiflora L. consists of approximately 530 widely distributed species, including Passiflora edulis, which has drawn interest because of its commercial and agronomic value. Passiflora cincinnata is another important species owing to its long flowering period and resistance or tolerance to diseases and pests. In the present study, the meiotic segregation and pollen viability of an interspecific hybrid (P. edulis 9 P. cincinnata) and its parents were analyzed. The genomic contents were characterized using chromomycin A 3 (CMA 3)/4 0-6 0-diamidino-2-phenylindole (DAPI) staining, fluorescent in situ hybridization with 5S/45S ribosomal DNA (rDNA), genomic in situ hybridization (GISH), and inter-simple sequence repeat (ISSR) markers. The results indicated the diploid chromosome number for the parents and interspecific hybrid was 2n = 18. We also observed regular meiosis, one pair of 5S rDNA sites, and two pairs of 45S rDNA sites that colocalized with two pairs of CMA 3 ? /DAPIbands. The GISH data revealed three distinct chromosomal groups in the hybrid. The genetic origins of the interspecific hybrid, and its relationship with its parents were also confirmed using ISSR markers.

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“…Previous studies using melon germplasm from family farming showed the existence of high variability among melon accessions (DANTAS et al, 2012;ARAGÃO et al, 2013;AMORIM et al, 2016;MACÊDO et al, 2017;ANDRADE et al, 2019). However, some important characters for the improvement of melon were not emphasized in these studies, mainly regarding characteristics of some botanical varieties (PITRAT; HANELT; HAMMER, 2000), which are believed to be important factors and, therefore, should be considered.…”

Section: Introductionmentioning

confidence: 98%

Genetic parameters in melon sub-accessions from traditional agriculture

et al. 2023

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Family farming in Brazil holds a high diversity of melon germplasm, composing an important source of alleles for breeding programs. Thus, the objective of this study was to estimate genetic parameters and select genotypes from a population of melon sub-accessions from different botanical varieties grown by family farmers, based on morphological parameters. Two experiments were conducted, one in 2019 and another in 2020, in a complete randomized block design, with three replications and five plants per plot, using 27 melon sub-accessions (generation S2) from family farmers, and a commercial variety. Nine quantitative descriptors were evaluated. Assumptions of ANOVA were tested, followed by individual and joint analyses of variance. Significant differences were found among sub-accessions for all descriptors evaluated, with heritabilities higher than 83% and significant genotype-environment interactions for 88.8% of the characteristics evaluated. Thus, genetic variability was found among sub-accessions, with predominance of genetic effects over environmental effects, denoting the possibility to obtain genetic gains by the improvement of several characteristics of agronomic interest. The sub-accessions BGMEL66.0, BGMEL111.0, and BGMEL112.0 are recommended for inclusion in breeding programs focused on obtaining good prolificacy and small fruits with high soluble solid contents. BGMEL sub-accessions (108.3 and 108.5) can generate progenies with high prolificacy, and sub-accessions of the variety momordica can be used for generation of progenies focused on shortening the crop cycle and increasing fruit size.

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Caracterização molecular de acessos de melão coletados no nordeste brasileiro

Cited by 10 publications

References 6 publications

Selection of Morphoagronomic Descriptors in Physalis angulata L. Using Multivariate Techniques

Selection of Morphoagronomic Descriptors in Physalis angulata L. Using Multivariate Techniques

Cytogenetic characterization of the Passiflora edulis Sims × Passiflora cincinnata Mast. interspecific hybrid and its parents

Genetic parameters in melon sub-accessions from traditional agriculture

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