Research Article Genetics Analysis of the Biggest Cashew Tree in the World

Amaral, F.P.M. do; Sá, G. H. de; Filgueiras, L.A.; Filho, F. S. Maia; Soares, C.J.R. Santos; Amaral, M.P.M. do; Valente, Sérgio Emílio dos Santos; Mendes, A. N.

doi:10.4238/gmr16039817

Cited by 2 publications

(2 citation statements)

References 13 publications

(19 reference statements)

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“…may occur in the central Brazilian Cerrado because of lack of intrinsic barriers. Human dispersal must affect genetic patterns in domesticated populations; transport of genotypes by local farmers might explain the similarity between the Luzilândia (LU) and Cajueiro da Praia (CP) populations, the latter being a locality well known for its giant cashew tree (Amaral et al 2017).…”

Section: Source Of Variationmentioning

confidence: 99%

“…Dhanaraj et al 2002;Rout et al 2002;Samal et al 2002;Archak et al 2003a, b;Samal et al 2003;Desai 2008;Archak et al 2009;Thimmappaiah et al 2009;Dashmohapatra et al 2014;Sethi 2015;Jena et al 2016), Brazil (e.g. Barros 1991;Cavalcanti and Wilkinson 2007;Pessoni 2007;Amaral et al 2017;Borges et al 2018), Nigeria (e.g. Aliyu and Awopetu 2007) and Tanzania (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Genetic diversity in wild populations of the restinga ecotype of the cashew (Anacardium occidentale) in coastal Piauí, Brazil

et al. 2019

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The cashew, Anacardium occidentale, is a globally important tropical fruit tree, but little is known about its natural infraspecific systematics. Wild Brazilian populations occur in the cerrado biome and coastal restinga vegetation. We investigated whether wild coastal and domesticated populations could be distinguished genetically using inter-simple repeat molecular markers (ISSRs). In total, 94 polymorphic loci from five primers were used to characterise genetic diversity, structure and differentiation in four wild restinga populations and four domesticated ones from eight localities in Piauí state (30 individuals per population). Genetic diversity was greater overall in wild (%P: 57.2%, I: 0.24, H e : 0.15) than domesticated populations (%P: 49.5%, I: 0.19, H e : 0.12). Significant structure was observed among the eight populations (between-population variance 22%, Φ PT = 0.217, P ≥ 0.001), but only weak distinctions between wild and domesticated groups. Cluster and principal coordinate analyses showed marked genetic disparity in populations. No correlation of genetic and geographical interpopulation distance was found (Mantel test, r = 0.02032, P = 0.4436). Bayesian analysis found an eight-group optimal model (ΔK = 50.2, K = 8), which mostly corresponded to sampled populations. Wild populations show strong genetic heterogeneity within a small geographical area despite probable gene flow between them. Within-population genetic diversity of wild plants varied considerably and was lower where extractive activities by local people are most intense (Labino population). The study underlines the importance of wild populations as in situ genetic reserves and the urgent need for further studies to support their conservation.

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Section: Source Of Variationmentioning

confidence: 99%