Genetic variability and effective population size in Hymenaea stigonocarpa (Fabaceae) germplasm collection: tools for breeding programs and genetic conservation

Gonçalves, Ariany Rosa; Chaves, Lázaro José; Telles, Mariana Pires de Campos

doi:10.1007/s10709-019-00076-0

Cited by 8 publications

(9 citation statements)

References 33 publications

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“…This apparently low value is due to the strong genetic structure observed in the population, which does not meet the conditions of panmixia (Boaventura- Novaes et al 2018). However, this effective population size is consistent with results from other studies with species from the Brazilian Savanna, such as Hymenaea stigonocarpa (Gonçalves et al 2019) and Dipteryx alata (Guimarães et al 2019)…”

Section: Resultssupporting

confidence: 91%

Genetic variability of the initial growth of Eugenia dysenterica DC.: implications for conservation and breeding1

Novaes

Mota

et al. 2021

Pesqui. Agropecu. Trop.

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Eugenia dysenterica DC. is a native tree from the Brazilian Savanna known as a genetic resource for its fruits and culinary potential. The knowledge on the genetic variability of agronomic traits is important to support studies on its conservation and domestication. This study aimed to estimate the quantitative genetic parameters of initial growth traits among and within E. dysenterica subpopulations, in provenance and progeny testing, and establish a germplasm collection representative of the species distribution. For that, 25 natural subpopulations were sampled and, within each subpopulation, six mother trees. The progenies were sown in a nursery, in a randomized complete blocks design consisting of 150 progenies, four replications and five plants per plot. The analysis of variance of the initial development traits revealed a greater variability among the progenies within the subpopulation than that observed among the subpopulations. The aboveground biomass represented only 15 % of the total biomass, a recurrent characteristic in Brazilian Savanna species. The estimated heritability and coefficients of genetic variation presented selection potential for the initial development traits, which are important for commercial seedlings production. An in vivo ex situ germplasm collection was established for conservation and breeding purposes, using a sample of four plants from each progeny.

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Section: Resultssupporting

confidence: 91%

Genetic variability of the initial growth of Eugenia dysenterica DC.: implications for conservation and breeding1

Novaes

Mota

et al. 2021

Pesqui. Agropecu. Trop.

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“…The safe conservation of plant genetic resources is essential for breeding programs and is an underpinning technology to guarantee adequate food supplies for future human generations ( Villalobos and Engelmann, 1995 ; Gonçalves et al., 2019 ). Such conservation, with the aim of sustainable utilization, can be realized through several forms of germplasm, such as seeds, living plants in germplasm nurseries, and plant tissue in vitro ( Dinato et al., 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Mechanistic insights derived from re-establishment of desiccation tolerance in germinating xerophytic seeds: Caragana korshinskii as an example

Peng

Huang

et al. 2022

Front. Plant Sci.

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Germplasm conservation strongly depends on the desiccation tolerance (DT) of seeds. Xerophytic seeds have strong desiccation resistance, which makes them excellent models to study DT. Although some experimental strategies have been applied previously, most methods are difficult to apply to xerophytic seeds. In this review, we attempted to synthesize current strategies for the study of seed DT and provide an in-depth look at Caragana korshinskii as an example. First, we analyze congenital advantages of xerophytes in the study of seed DT. Second, we summarize several strategies used to study DT and illustrate a suitable strategy for xerophytic species. Then, based on our previous studies work with C. korshinskii, a feasible technical strategy for DT re-establishment is provided and we provide illustrate some special molecular mechanisms seen in xerophytic seeds. Finally, several steps to unveil the DT mechanism of xerophytic seeds are suggested, and three scientific questions that the field should consider are listed. We hope to optimize and utilize this strategy for more xerophytic species to more systematically decipher the physiological and molecular processes of seed DT and provide more candidate genes for molecular breeding.

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“…In addition, it can generate hypotheses on the traits and populations that would be influenced by natural selection, and these traits can be evaluated in future studies (Leinonen et al 2008, Pujol 2008. Data from microsatellite markers, obtained from populations overlaid on the sampling area of this study, indicated the existence of high and significant interpopulation genetic differentiation in H. stigonocarpa due to genetic drift (Braga et al 2019, Gonçalves et al 2019. The quantitative approach evaluated here demonstrates that phenotypic variability is more relevant at a local level than among populations, as evolutionary forces behave in different ways at different hierarchical levels.…”

Section: Resultsmentioning

confidence: 90%

“…Recently, population genetic studies have shown that there is a high genetic differentiation among populations of H. stigonocarpa that is caused by genetic drift and divergence among the botanical varieties of the species (Braga et al 2019, Gonçalves et al 2019. Based on microsatellite markers, the existence of two genetic groups separated by intervarietal genetic divergence and space was verified, and geographically close populations were found to be more genetically similar (Braga et al 2019).…”

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confidence: 99%

Phenotypic variability of fruits and seeds in natural populations of Hymenaea stigonocarpa (Mart. Ex Hayne)

Castro

Gonçalves

Ferreira

et al. 2021

Pesqui. Agropecu. Trop.

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Hymenaea stigonocarpa (Mart. Ex Hayne), popularly known as jatobá-do-cerrado, is a fruit tree widely distributed in the Brazilian Savanna, has multiple uses and is a promising genetic resource. This study aimed to physically characterize fruits and seeds of H. stigonocarpa, as well as to estimate the phenotypic variability at three hierarchical levels: populations, mother trees within populations, and fruits/seeds within mother trees. Fruits from six mother trees were sampled from each of the 25 natural populations found in the Brazilian Savanna. The morphometric characterization of 742 fruits was carried out by evaluating 10 quantitative traits in fruits and seeds. In addition, comparative analyses were performed between the average values of H. stigonocarpa and the botanical variety H. stigonocarpa var. brevipetiolata. Significant phenotypic variations were noticed at all hierarchical levels. A high phenotypic differentiation among the populations was observed for quantitative traits (fruit mass and size, pulp mass and seed mass), being higher when H. stigonocarpa var. brevipetiolata was included in the analysis.

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Genetic variability and effective population size in Hymenaea stigonocarpa (Fabaceae) germplasm collection: tools for breeding programs and genetic conservation

Cited by 8 publications

References 33 publications

Genetic variability of the initial growth of Eugenia dysenterica DC.: implications for conservation and breeding1

Genetic variability of the initial growth of Eugenia dysenterica DC.: implications for conservation and breeding1

Mechanistic insights derived from re-establishment of desiccation tolerance in germinating xerophytic seeds: Caragana korshinskii as an example

Phenotypic variability of fruits and seeds in natural populations of Hymenaea stigonocarpa (Mart. Ex Hayne)

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