Genetic Diversity and Structure of Macaw Palm: Implications for Genetic Variability Sampling

Silva, Luiz Cláudio Costa; Lemos, Roxane do Carmo; Carvalho, Calil Gibran Iraiore; God, Pedro Ivo Vieira Good; Oliveira, Luiz Orlando de; Dal-Bianco, Maximiller; Piovesan, Newton Deniz; Moreira, Maurílio Alves

doi:10.1590/1806-90882017000500008

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…Lanes et al (2015) analyzed the genetic diversity of individuals from Acrocomia from different Brazilian localities with microsatellite markers and identified the formation of two main groups, one formed by individuals from the Pantanal region of Mato Grosso do Sul with high genetic differentiation according to the F ST index. Similarly, the information generated by the ITS region of 67 A. aculeatagenotypes from the study by Silva et al (2017) identified the formation of four haplotypes, two of them shared by genotypes of São Paulo and Minas Gerais, and a unique haplotype of genotypes collected in Mato Grosso do Sul near the Paraguay border, also suggesting the occurrence of different species of Acrocomia. Some phenotypic characteristics have been used to distinguish species from the genus Acrocomia (Lorenzi 2010).…”

Section: Delimitation Of Species a Aculeata And A Totaimentioning

confidence: 76%

Species delimitation and hybrid identification of Acrocomia aculeata and A. totai by genetic population approach

Diaz

Zucchi

Alves‐Pereira

et al. 2020

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To the Neotropical genus Acrocomia (Arecaceae) is attributed eight species with a wide distribution in America. A. aculeata and A. totai are the most important species because of their high economic potential for oil production. However, there is no consensus in their classification as different taxons and their distinctiveness is particularly challenging due to morphological similarities with large plasticity of the traits. In addition, there is doubt about the occurrence of interspecific hybrids between both species. In this study, we applied a genetic population approach to assessing the genetic boundaries, diversity and to identify interspecific hybrids of A. aculeata and A. totai. Thirteen loci of simple sequence repeat (SSR) were employed to analyze twelve populations representing a wide distribution of species, from Minas Gerais, Brazil to Formosa, Argentina. Based on the Bayesian analysis (STRUCTURE and NewHybrids) and Discriminant Analysis of Principal Components (DAPC), our study supports the recognition of A. aculeata and A. totai as two species and the estimates of genetic parameters revealed more genetic diversity in A. totai (H E =0.551) than in A. aculeata (H E =0.466). We obtained evidence of hybridization between the species and that admixed individuals were assigned as F2 hybrids. In conclusion, this study showed the usefulness of microsatellite markers to elucidate the genetic boundaries of A. aculeata and A. totai, supporting their classification as different species and increase our knowledge about genetic diversity at the level of populations and species. The results are essentials to establish strategies for the adequate management, conservation, and domestication of both species.

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Section: Delimitation Of Species a Aculeata And A Totaimentioning

confidence: 76%

Species delimitation and hybrid identification of Acrocomia aculeata and A. totai by genetic population approach

Diaz

Zucchi

Alves‐Pereira

et al. 2020

Preprint

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“…Lanes et al (23) used microsatellite markers to demonstrate the marked genetic differences of A. aculeata between individuals from the Pantanal region, State of Mato Grosso do Sul, Brazil, and other regions of the country. Similarly, Silva et al (27) analyzed the variation in the internal transcribed spacer (ITS) region and identified four haplotypes. Two were shared by genotypes from São Paulo and Minas Gerais, and one was exclusive to genotypes collected in Mato Grosso do Sul.…”

Section: A Aculeatamentioning

confidence: 99%

“…Two were shared by genotypes from São Paulo and Minas Gerais, and one was exclusive to genotypes collected in Mato Grosso do Sul. The morphological characteristics of A. aculeata include larger fruits (3.5 and 5.0 cm) and a pulp oil content that can reach approximately 78% (27,(68)(69)(70) while the fruits of A. totai are smaller (2.5 and 3.5 cm) with a pulp oil content between 26% and 33% (68, 71, 72. In Brazil, A. totai is considered to be restricted to the State of Mato Grosso do Sul [4,69,70]. An interesting finding of our study was that samples from Xambrê, Paraná (XAM) and a sample from Palmas, Tocantins (PAL_182), considered as A. aculeata based on Lorenzi et al, [4] taxonomic classification, were attributed to cluster 2 of A. totai by the Bayesian analysis (Fig 2), by been proven, our results are consistent with the information reported on the Flora do Brazil 2020 website [15], indicating the possible occurrence of A. totai in these states.…”

Section: A Aculeatamentioning

confidence: 99%

“…In Acrocomia, microsatellites or simple sequence repeats (SSR) have been the most used molecular markers, with the main objective of evaluating the genetic diversity and structure of natural populations and germplasm banks [12,[23][24][25][26]. Other approaches include the use of internal transcribed ribosomal 18S-26S spacer (ITS region) [27] and random amplification of polymorphic DNA (RAPD) markers [28]. However, most studies have focused on A. aculeata [12,23,25,26,29].…”

Section: Introductionmentioning

confidence: 99%

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Whole-genome SNP analysis elucidates the genetic population structure and diversity of Acrocomia species

Diaz

Zucchi

Alves‐Pereira

et al. 2020

Preprint

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Acrocomia (Arecaceae) is a genus widely distributed in tropical and subtropical America that has been achieving economic interest due to the great potential of oil production of some of its species. In particular A. aculeata, due to its vocation to supply oil with the same productive capacity as the oil palm even in areas with water deficit. Although eight species are recognized in the genus, the taxonomic classification based on morphology and geographic distribution is still controversial. Knowledge about the genetic diversity and population structure of the species is limited, which has limited the understanding of the genetic relationships and the orientation of management, conservation, and genetic improvement activities of species of the genus. In the present study, we analyzed the genomic diversity and population structure of seven species of Acrocomia including 117 samples of A. aculeata covering a wide geographical area of occurrence, using single nucleotide Polymorphism (SNP) markers originated from Genotyping By Sequencing (GBS). The genetic structure of the Acrocomia species were partially congruent with the current taxonomic classification based on morphological characters, recovering the separation of the species A. aculeata, A. totai, A. crispa and A. intumescens as distinct taxonomic groups. However, the species A. media was attributed to the cluster of A. aculeata while A. hassleri and A. glauscescens were grouped together with A. totai. The species that showed the highest and lowest genetic diversity were A. totai and A. media, respectively. When analyzed separately, the species A. aculeata showed a strong genetic structure, forming two genetic groups, the first represented mainly by genotypes from Brazil and the second by accessions from Central and North American countries. Greater genetic diversity was found in Brazil when compared to the other countries. Our results on the genetic diversity of the genus are unprecedented, as is also establishes new insights on the genomic relationships between Acrocomia species. It is also the first study to provide a more global view of the genomic diversity of A. aculeata. We also highlight the applicability of genomic data as a reference for future studies on genetic diversity, taxonomy, evolution and phylogeny of the Acrocomia genus, as well as to support strategies for the conservation, exploration and breeding of Acrocomia species and in particular A. aculeata.

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“…In Acrocomia, microsatellites or simple sequence repeats (SSR) have been the most used molecular markers, with the main objective of evaluating the genetic diversity and structure of natural populations and germplasm banks [18,19,[36][37][38]. Other approaches include the use of internal transcribed ribosomal 18S-26S spacer (ITS region) [39] and random amplification of polymorphic DNA (RAPD) markers [40]. However, most studies have focused on A. aculeata [18,20,[36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Genome-wide SNP analysis to assess the genetic population structure and diversity of Acrocomia species

et al. 2021

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Acrocomia (Arecaceae) is a genus widely distributed in tropical and subtropical America that has been achieving economic interest due to the great potential of oil production of some of its species. In particular A. aculeata, due to its vocation to supply oil with the same productive capacity as the oil palm (Elaeis guineenses) even in areas with water deficit. Although eight species are recognized in the genus, the taxonomic classification based on morphology and geographic distribution is still controversial. Knowledge about the genetic diversity and population structure of the species is limited, which has limited the understanding of the genetic relationships and the orientation of management, conservation, and genetic improvement activities of species of the genus. In the present study, we analyzed the genomic diversity and population structure of Acrocomia genus, including 172 samples from seven species, with a focus on A. aculeata with 117 samples covering a wide geographical area of occurrence of the species, using Single Nucleotide Polymorphism (SNP) markers originated from Genotyping By Sequencing (GBS).The genetic structure of the Acrocomia species were partially congruent with the current taxonomic classification based on morphological characters, recovering the separation of the species A. aculeata, A. totai, A. crispa and A. intumescens as distinct taxonomic groups. However, the species A. media was attributed to the cluster of A. aculeata while A. hassleri and A. glauscescens were grouped together with A. totai. The species that showed the highest and lowest genetic diversity were A. totai and A. media, respectively. When analyzed separately, the species A. aculeata showed a strong genetic structure, forming two genetic groups, the first represented mainly by genotypes from Brazil and the second by accessions from Central and North American countries. Greater genetic diversity was found in Brazil when compared to the other countries. Our results on the genetic diversity of the genus are unprecedented, as is also establishes new insights on the genomic relationships between Acrocomia species. It is also the first study to provide a more global view of the genomic diversity of A. aculeata. We also highlight the applicability of genomic data as a reference for future studies on genetic diversity, taxonomy, evolution and phylogeny of the Acrocomia genus, as well as to support strategies for the conservation, exploration and breeding of Acrocomia species and in particular A. aculeata.

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Genetic Diversity and Structure of Macaw Palm: Implications for Genetic Variability Sampling

Cited by 6 publications

References 22 publications

Species delimitation and hybrid identification of Acrocomia aculeata and A. totai by genetic population approach

Species delimitation and hybrid identification of Acrocomia aculeata and A. totai by genetic population approach

Whole-genome SNP analysis elucidates the genetic population structure and diversity of Acrocomia species

Genome-wide SNP analysis to assess the genetic population structure and diversity of Acrocomia species

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