In Situ, Ex Situ and On Farm Conservation of Plant Genetic Resources in Neotropics

Siqueira, Marcos Vinicius Bohrer Monteiro; Costa, Flaviane Malaquias; Novaes, Carolina Ribeiro Diniz Boaventura; Bustamante, Patrícia Goulart; de Moraes Silvestre, Marcela Aparecida

doi:10.1007/978-3-031-34854-9_9

Cited by 1 publication

(1 citation statement)

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“…Experience with in-field conservation of long-cycle species native to the Amazon region suggests that in situ conservation of P. multijuga should be promoted in areas where this species is distributed. With in situ conservation, efforts and resources can be focused on small-scale working collections, including only the highest-potential genotypes selected in situ, which, in the very first selection cycle, could become the initial seed production fields for plantations [45].…”

Section: Crossing Systemmentioning

confidence: 99%

Mating System Analysis and Genetic Diversity of Parkia multijuga Benth. One Native Tree Species of the Amazon

Oliveira,

Ramos,

Ferreira

et al. 2024

Forests

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The Amazonian native tree species Parkia multijuga has potential silvicultural characteristics that can be utilized to productive plantations. Understanding its mating system is necessary to delineate the methods for the breeding of the species, the collection of seeds for conservation, and the use of seedlings for production plantations. The aim of this study is to evaluate the mating system and population genetic diversity of P. multijuga, using molecular markers. The DNA of 221 plants was extracted and genotyped with nine microsatellite loci using capillary electrophoresis in an automated DNA sequencer. The estimates for single and multilocus crossing rates were 0.998 and 1.0, respectively. The paternity correlation was low (r^p(m) = 0.307). The fixation index (f) showed values below zero, indicating an excess of heterozygotes. The cluster number K = 2 shows a better grouping among families for genetic structure. P. multijuga families consist mainly of half-sibs, and the reproductive strategy of the species is allogamy.

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Section: Crossing Systemmentioning

confidence: 99%