Estimates of genetic parameters in Mimosa scabrella populations by random and mixed reproduction models

Sobierajski, Graciela da Rocha; Kageyama, Paulo Yoshio; Sebbenn, Alexandre Magno

doi:10.12702/1984-7033.v06n01a07

Cited by 5 publications

(6 citation statements)

References 9 publications

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“…The mean coancestry coefficient within progenies (Θ = 0.162) was higher than expected in half-sib progenies (0.125). Thus, estimates of addictive genetic variance and heritability must be calculated using a relatedness coefficient (Sobierajski et al 2006) of 0.324 (2Θ) instead of 0.25. Knowledge about the coancestry coefficient is also important when estimating the variance effective size (N̂e), which was lower (N̂e = 2.76) than expected in the random mating populations (4, Furlani et al 2005).…”

Section: Resultsmentioning

confidence: 99%

Mating system analysis of Açaí-do-Amazonas (Euterpe precatoria Mart.) using molecular markers

Ramos

Lopes

et al. 2019

Crop Breed. Appl. Biotechnol.

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Euterpe precatoria (Açaí-do-Amazonas) produces fruits of which the fresh pulp is consumed. It is almost exclusively collected by extractivist farmers, because no selected genotypes are available for the establishment of plantations. For the domestication and breeding of the species, mating system studies are needed for strategy formulation. This study evaluated the mating system of a natural population of E. precatoria. Thirteen progenies were genotyped with 13 microsatellite loci by capillary electrophoresis in an automated DNA sequencer. Estimates of single-locus and multilocus outcrossing rates were 1.0, and paternity correlation was low (r̂p (m) = 0.293). Euterpe precatoria families consist mainly of half-sibs and the reproductive strategy of the species is allogamy.

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Section: Resultsmentioning

confidence: 99%

Mating system analysis of Açaí-do-Amazonas (Euterpe precatoria Mart.) using molecular markers

Ramos

Lopes

et al. 2019

Crop Breed. Appl. Biotechnol.

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“…In this way, over time the managed and the spontaneous bracatingais may be complementing each other genetically. At macro-geographical scales (up to 300 km), Sobierajski et al (2006b) also showed low genetic divergence (H p ) among populations of bracatinga. The similarity in diversity among all populations studied suggests the same genetic base, augmented by strong gene flow in past generations, and reveals that much of the genetic variability (95%) lies within the bracatingais, re-enforcing the role of local history in genetic diversity.…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity and mating system of bracatinga (Mimosa scabrella) in a re-emergent agroforestry system in southern Brazil

et al. 2011

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Bracatinga (Mimosa scabrella) is a legume tree species common in the early stages of succession in Araucaria angustifolia forests in southern Brazil. Bracatinga can form high-density monospecific stands called bracatingais. Its traditional management for charcoal production involves maintenance of the seed bank. Our objective was to analyze the genetic diversity and structure of bracatingais to understand the mechanisms by which intraspecific diversity of M. scabrella is created and maintained in landscapes managed by family farmers in their agroforestry mosaics. We analyzed 14 bracatingais using 8 allozyme loci. We compared parental and progeny generation indices (7 loci) and described the mating system (9 loci) of two progenies. Overall diversity was high: A = 2.69, H o = 0.257, H e = 0.382 and similar between populations. Overall fixation (F = 0.364) was similar to the fixation index (f = 0.329). The genetic divergence among populations was low (H p = 0.052) but significant. The progenies' genetic diversity values were similar to those of the previous generation (H e pop11 = 0.342 vs. 0.420/H e pop10 = 0.432 vs. 0.400). Progenies were compatible with halfsib and full-sib crossing expectations (h xy = 0.204 and 0.194). Our data showed that there is a tendency for genetic structuring caused not only by the reproductive system but also by genetic drift. It is very likely that the high genetic diversity is amplified by internal migration within each bracatingal. This study showed that current landscape management can contribute to maintaining high levels of bracatinga genetic diversity, which contributes to its regional conservation.

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“…After an environmental disturbance, this species develops favouring soil microorganisms due to the large deposition of litter and the symbiotic association with nitrogen-fixing bacteria, providing the environmental conditions for the growth of other secondary species in the initial steps of forest restoration (Citadini-Zanette et al 2017). Although this species does not depend on specialized pollinators (Sobierajski et al 2006), winter flowering may constrain the number of pollinators for a species commonly distributed in colder regions, such as the case of bracatinga. Despite the little information about its pollinators, the meliponids M. q. anthidioides and M. q. quadrifasciata were often cited as important visitors and pollinators of bracatinga (Catharino et al 1982; Ramalho et al 1989;Sobierajski et al 2006;Oliveira-Abreu et al 2014;Nascimento et al 2015).…”

Section: Discussionmentioning

confidence: 99%

“…The interaction of M. scabrella with the stingless bees is well reported in the literature. Studies have demonstrated that M. q. quadrifasciata and M. q. anthidioides are important visitors feeding on nectar and pollen of bracatinga (Ramalho et al 1989;Sobierajski et al 2006;Oliveira-Abreu et al 2014;Nascimento et al 2015), besides being one of its pollinators (Catharino et al 1982).…”

Section: Introductionmentioning

confidence: 99%

Climate change can affect the spatial association between stingless bees and Mimosa scabrella in the Brazilian Atlantic Forest

2020

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The species-specific responses to climate change can result in discordant range shifts, leading to changes in associations among species. In this study, we tested whether climate change can affect the spatial association between the plant Mimosa scabrella and the stingless bees Melipona quadrifasciata anthidioides and M. quadrifasciata quadrifasciata . Ecological niche models were used to predict current and future species distributions using intermediate (RCP 4.5) and high (RCP 8.5) greenhouse gas emission scenarios. Our models projected a pronounced reduction in climatically suitable habitats available for the studied species and identified a species-specific response to climate change. As a result, the models estimated a drastic reduction in the spatial association among species of up to 94% in the coming years, revealing that climate change may affect species interactions.biotic interaction / ecological niche modelling / Melipona / pollination / spatial association

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Estimates of genetic parameters in Mimosa scabrella populations by random and mixed reproduction models

Abstract: Estimates of genetic parameters in Mimosa scabrella populations by random and mixed reproduction models

Cited by 5 publications

References 9 publications

Mating system analysis of Açaí-do-Amazonas (Euterpe precatoria Mart.) using molecular markers

Mating system analysis of Açaí-do-Amazonas (Euterpe precatoria Mart.) using molecular markers

Genetic diversity and mating system of bracatinga (Mimosa scabrella) in a re-emergent agroforestry system in southern Brazil

Climate change can affect the spatial association between stingless bees and Mimosa scabrella in the Brazilian Atlantic Forest

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