Genetic polymorphism among natural populations of Anacardium humile A. ST-HIL

Santos, Silvia Corrêa; Carvalho, Raquel dos Santos; Davide, Livia Maria Chamma

doi:10.1590/0100-29452020476

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Analysis of the genetic diversity of natural cashew populations (Anacardium humile) in GO-Brazil, by RAPD, revealed higher Nei (0.3842) and Shannon (0.5662) diversity rates than our work, indicating greater genetic diversity of cajui in the cerrado of the Brazil (Santos et al 2019). This reinforces the need for conservation strategies in the PNSC's cashew species.…”

Section: Discussionsupporting

confidence: 62%

Genetic diversity and structure in natural populations of Cajui from Brazilian Cerrado

Gomes

Borges²,

Batista

et al. 2021

Biosci. J.

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Cajui (Anacardium spp.) is a native fruit tree (small cashew) of the Brazilian Cerrado and possesses the potential for commercialization. However, cajui exploitation occurs exclusively through extractivism in the absence of conservation strategies. The lack of conservation strategies may lead to a decrease in genetic diversity of Anacardium. In this work, the genetic diversity and population structure of three natural populations in Sete Cidades National Park (PNSC; PI, Brazil) were assessed using ISSR analysis of 56 cajui accessions and two A. occidentale accessions (outgroup) from Pacajus (CE, Brazil). A total of 112 markers were obtained, 93 (83.04%) of which were polymorphic. The diversity indices of these populations indicated moderate levels of genetic diversity. According to AMOVA, 96.17% of the genetic variability lay within populations, with low genetic differentiation among populations (ΦST = 0.03828). Furthermore, STRUCTURE analysis indicated the existence of four connected genetic groups. The findings show that the individuals from the three collection sites did not represent different subpopulations, likely due to the high gene flow (Nm = 6.7) favored by the floral biology of Anacardium, pollinators and small-animal seed dispersers. This research identifies genetically divergent individuals (C-03, C-05, C-22, C-26, C-34 and C-39), which should be considered priority individuals for conservation and can inform conservation programs for Anacardium spp.

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Section: Discussionsupporting

confidence: 62%

Genetic diversity and structure in natural populations of Cajui from Brazilian Cerrado

Gomes

Borges²,

Batista

et al. 2021

Biosci. J.

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Using morphometrics to distinguish the restinga and cerrado ecotypes of wild Anacardium occidentale (Anacardiaceae): a preliminary study in northeastern Brazil

Farias,

Mayo,

Vieira

et al. 2024

Plant Syst Evol

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The cashew tree Anacardium occidentale is a globally important food species and in Brazil is a natural component of cerrado and restinga vegetation and has an important role in local economies as a food and medicinal plant. Nevertheless, diversity studies of wild populations—the most important reservoir of natural variation—of this naturally widespread species are urgently needed for conservation strategies because of human impact on tropical American ecosystems where it occurs. Here, we sought to differentiate the previously recognized restinga and cerrado ecotypes using multivariate morphometrics of wild populations in a limited area of northeast Brazil (northern Piauí and northeastern Maranhão states). Thirty individuals were sampled for 47 vegetative and reproductive descriptors from six wild populations (three of each ecotype). Data analysis included principal component analysis and three classification methods (linear discriminant analysis, k-nearest neighbour analysis and classification and regression tree analysis); cross-validation tests were applied to classification results. Univariate statistics obtained for each population and ecotype were found to be consistent with the previously proposed distinction between the two ecotypes. Although principal component analysis showed extensive variation and overlap between populations, cross-validations of classification analyses showed strong differentiation between ecotypes and between most populations; vegetative and reproductive variables were equally important for discrimination. Cerrado populations were more variable and somewhat less distinct than restinga ones. New molecular genetic investigations of wild populations are needed to provide genetic support for the morphological differentiation of the ecotypes reported here.

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Leaf area estimation of Anacardium humile

et al. 2020

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The Anacardium humile A. St.- Hil. fruit tree has productive potential, being their fruits appreciated in the Cerrado region for having characteristic flavor, however, this species is still exploited in an extractive way, being necessary studies for its domestication. The aim of this work was to estimate the leaf area of Anacardium humile. One hundred leaves were collected in the biological collection from a genetic resources field and evaluated for length, width and fresh weight, and scanned at resolution of 300 dpi to determine the leaf area with the aid of the ImageJ image analysis program. Subsequently, a leaf disc with a diameter of 22.27 mm was detached at the basal portion of each leaf, in which the fresh weight of the discs was obtained. Data were submitted to descriptive analysis and the relationship among the features explained by Pearson’s correlation with the software Rbio. The data were also subjected to regression analysis to explain the relationship between leaf area and measurements of width, length and leaf weight, and to fit the proper statistical model with the software Origin. It was concluded that leaf area can be determined by image analysis software and linear measurements are correlated to leaf area.

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Genetic polymorphism among natural populations of Anacardium humile A. ST-HIL

Cited by 3 publications

References 15 publications

Genetic diversity and structure in natural populations of Cajui from Brazilian Cerrado

Genetic diversity and structure in natural populations of Cajui from Brazilian Cerrado

Using morphometrics to distinguish the restinga and cerrado ecotypes of wild Anacardium occidentale (Anacardiaceae): a preliminary study in northeastern Brazil

Leaf area estimation of Anacardium humile

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