Meiotic Behavior and Pollen Viability of Spondias mombin L.: Native Fruit Species of the Amazon

Zortéa, Kelli Évelin Müller; Rossi, Ana Aparecida Bandini; Bispo, Rosimeire Barboza; Rocha, Vinícius Delgado da; Hoogerheide, E. S. S.

doi:10.1590/2179-8087.037518

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“…S. mombin (2n = 2x = 30) reproduces by cross-pollination performed mainly by bees, and it also presents vegetative propagation. Furthermore, it presents protandrous dichogamy and a high value of the pollen/ovule ratio (Ramos 2009;Zortéa et al 2019). The species is classi ed as andromonoecious (Ramos 2009), having staminate and hermaphrodite owers arranged in in orescences of the terminal pyramidal panicles type (Coradin et al 2022).…”

Section: Introductionmentioning

confidence: 99%

“…(2009) with four yellow mombin populations from Pernambuco assessed with nine isoenzyme loci, the values for genetic diversity ranged from 0.530 to 0.574. Using SSR markers,Zortéa et al (2019) found values ranging from 0.199 to 0.486, with a mean of He = 0.335, for populations in Mato Grosso, Midwest region. A study with three populations from the north of the State of Mato Grosso based on 14 ISSR primers identi ed genetic diversity values ranging from 0.20 to 0.24(Silva et al 2017b).…”

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Genetic divergence between Brazilian Northern and Northeastern populations of Spondias mombin revealed with SNP markers

Silva

Garcia

Carvalho

et al. 2023

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Spondias mombin L. (family Anacardiaceae) is an arboreal and allogamous fruit tree native from southern Mexico to southeastern Brazil, with great potential for economic exploitation. This study aimed to evaluate the structure and genomic diversity of yellow mombin in Brazil’s North and Northeast regions using SNP (Single Nucleotide Polymorphisms) markers. Significant genetic divergence was observed in the clustering analysis and dendrogram construction between the North and Northeast regions. The Mantel test identified a high positive and significant correlation (r = 0.78; p < 0.001), indicating isolation by distance. In the genetic diversity analysis, populations from the North Region presented a greater number of alleles (2.722, on average) and genetic diversity (HE = 0.1860) regarding the populations from the Northeast Region (2.509 alleles and HE = 0.1059). Although presenting greater genetic diversity, the North Region had a positive inbreeding coefficient (f) in three of the four studied populations, ranging from 0.0855 to 0.2421. The results obtained contribute to the understanding of the distribution of genetic variation and the conservation status of the yellow mombin populations in the two regions; they could also be used as a subsidy for developing conservation strategies and the genetic improvement of this species.

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confidence: 99%

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confidence: 99%