DESEMPENHO DE CINCO PROCEDÊNCIAS DE Grevillea robusta NO NORTE DO PARANÁ

Leal, Alex Carneiro; Ramos, André Luiz Medeiros

doi:10.5380/rf.v41i2.21876

Cited by 2 publications

(3 citation statements)

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“…Data from a provenance tests carried out in northern State of Paraná and elsewhere in Brazil (Sebbenn et al, 1999;Martins et al, 2006;Leal and Ramos, 2011) have demonstrated higher performances of recently introduced provenances in comparison to previously introduced material.…”

Section: Discussionmentioning

confidence: 99%

“…Thereafter new provenances were reintroduced in Brazil and institutions as Instituto Florestal de São Paulo (IF-SP), Embrapa Florestas (CNPF) and Instituto Agronômico do Paraná (IAPAR) which demonstrated it potential Paraná, São Paulo and Mato Grosso do Sul States. Differences between them have been reported (Sebbenn et al, 1999;Martins et al, 2005;Martins et al, 2006;Leal and Ramos, 2011).…”

Section: Introductionmentioning

confidence: 94%

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Gene Diversity in Grevillea Populations Introduced in Brazil and Its Implication on Management of Genetic Resources

et al. 2018

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-We describe isoenzymes variability in six populations of Grevillea robusta from a provenances and progenies test established in a randomized block design with five plants per replication in Southern Brazil. The population genetic structure was examined by using biochemical markers in 5-year old trees, specifically at MDH-3, PGM-2, DIA-2, PO-1, PO-2, SOD-1, and SKDH-1 loci. The northern provenances (Rathdowney and Woodenbong) showed a strong divergence in relation to the average of provenances when alleles per locus (Ap), allele richness (Rs), Nei's gene diversity (H), and inbreeding coefficient (f) were considered. Inbreeding in varying degrees was detected. The commercial control showed the highest inbreeding coefficient, (f = 0.4448), whereas the provenance average was f = 0.2306, possibly due to insufficient sampling of populations in their origin (Australia). Despite its restricted natural range, a positive correlation between genetic divergence and geographic distance among original populations was detected. Genetic distance and cluster analyses based on the Bayesian model revealed three distinct provenance groups: 1) Rathdowney-QLD and Woodenbong-QLD; 2) Paddy's Flat-NSW; and 3) Mann River-NSW, Boyd River-NSW and the commercial control (material used in Brazil). The grouping of the control to both Mann River-NSW and Boyd River-NSW provenances suggests that the northern provenances have the highest potential for genetic improvement of wood productivity in Brazil, due to their high genetic diversity and low inbreeding coefficient. RESUMO -A variabilidade isoenzimática para seis populações de Grevillea robusta, oriundas de um teste de procedências/progenies, implantado no delineamento em blocos casualizados com 5 plantas por parcela, no Sul do Brasil, é descrita. A estrutura genética da população foi analisada utilizando-se marcadores bioquímicos, aos 5 anos de idade, especificamente para os locos MDH-3, PGM-2, DIA-2, PO-1, PO-2, SOD-1, e SKDH-1. As procedências do norte de ocorrência natural (Rathdowney e Woodenbong) apresentaram divergência genética superior, em relação à média das progênies, considerando o número de alelos por locus, (Ap), a riqueza alélica (Rs), a diversidade genética de Nei (H), e o coeficiente de endogamia (f). A endogamia foi detectada em diversos graus. A testemunha comercial apresentou o maior coeficiente de endogamia, (f = 0,4448), comparativamente à média das procedências (f = 0,2306), possivelmente devido à insuficiente amostragem populacional na região de origem (Austrália). Apesar de sua ocorrência natural restrita, observou-se correlação positiva entre divergência genética e distância geográfica entre as populações originais. A distância genética e análise de cluster, baseada no modelo bayesiano, mostrou três grupos de procedências distintos: 1) Rathdowney-QLD e Woodenbong-QLD; 2) Paddy's Flat-NSW; e 3) Mann River-NSW, Boyd River-NSW e a testemunha comercial (material utilizado no Brasil). O agrupamento da testemunha com as procedências Mann River-NSW e Boyd River-NSW...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

Gene Diversity in Grevillea Populations Introduced in Brazil and Its Implication on Management of Genetic Resources

et al. 2018

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“…The species is endemic to Queensland, i.e., eastern Australia, and is widely distributed in southeast Asia, Africa, and the southern part of North America and South America [8]. In the last three decades, G. robusta was introduced from Australia to all regions of the world, viz., China, Eritrea, Ethiopia, India, Indonesia, Jamaica, Kenya, Laos, Malawi, Malaysia, Mauritius, Nepal, Pakistan, the Philippines, South Africa, Sri Lanka, Tanzania, Uganda, the United States of America, Vietnam, Zambia, and Zimbabwe [9][10][11][12][13][14][15][16]. In India, the species is distributed in approx.…”

Section: Introductionmentioning

confidence: 99%

Phenotypic, Geological, and Climatic Spatio-Temporal Analyses of an Exotic Grevillea robusta in the Northwestern Himalayas

et al. 2023

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The last five decades (since 1980) have witnessed the introduction of exotic trees as a popular practice in India to fulfill the demand of forest-based products for utilization in afforestation programmes. This study examines the distribution and habitat suitability of exotic Grevillea robusta trees in the northwestern Himalayas (state: Uttarakhand), focusing on the interaction between G. robusta and abiotic factors, such as climate, soil, and habitat suitability. This multipurpose agroforestry species is mainly grown by farmers as a boundary tree, windbreak, or shelterbelt and among intercrops on small farms in agroforestry systems worldwide. The results indicate that phenotypic plasticity is determined by tree height and diameter, indicating a higher frequency of young and adult trees. The study also highlights spatio-temporal modeling coupled with geological analysis to address the current distribution pattern and future habitat suitability range through MaxEnt modeling. The AUC ranged from 0.793 ± 3.6 (RCP 6.0_70) to 0.836 ± 0.008 (current) with statistical measures, such as K (0.216), NMI (0.240), and TSS (0.686), revealing the high accuracy of the model output. The variables, which include the minimum temperature of the coldest month (Bio 6), the slope (Slo), the mean temperature of the driest quarter (Bio 9), and the precipitation of the driest quarter (Bio 17), contribute significantly to the prediction of the distribution of the species in the Himalayan state. The model predicts a significant habitat suitability range for G. robusta based on bio-climatic variables, covering an area of approximately ~1641 km2 with maximal occurrence in Pauri (~321 km2) and Almora (~317 km2). Notably, the future prediction scenario corroborates with the regions of Tons (Upper Yamuna, Uttarkashi), Kalsi (Mussoorie, Dehradun), the Kedarnath Wildlife Sanctuary, and the Badrinath Forest Division for the potentially suitable areas. The climate was found to have a strong influence on the species’ distribution, as evidenced by its correlation with the Köppen–Geiger climate classification (KGCC) map. While the species demonstrated adaptability, its occurrence showed a high correlation with bedrocks containing an elevated iron content. Furthermore, the study also provides the first trees outside forests (TOF) map of G. robusta in the region, as well as insight into its future habitat suitability.

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DESEMPENHO DE CINCO PROCEDÊNCIAS DE Grevillea robusta NO NORTE DO PARANÁ

Cited by 2 publications

References 1 publication

Gene Diversity in Grevillea Populations Introduced in Brazil and Its Implication on Management of Genetic Resources

Gene Diversity in Grevillea Populations Introduced in Brazil and Its Implication on Management of Genetic Resources

Phenotypic, Geological, and Climatic Spatio-Temporal Analyses of an Exotic Grevillea robusta in the Northwestern Himalayas

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