Elizabeth Ann Veasey - Academia.edu (original) (raw)
Papers by Elizabeth Ann Veasey
CIMMYT Research Data & Software Repository Network, Aug 5, 2021
Maíces de las Tierras Bajas de América del Sur y Conservación de la Agrobiodiversidad en Brasil y Uruguay, 2020
Genetics and Molecular Biology, 2000
Ninety-six accessions from the genera Calopogonium, Centrosema, Desmodium, Galactia, Macrotyloma,... more Ninety-six accessions from the genera Calopogonium, Centrosema, Desmodium, Galactia, Macrotyloma, Macroptilium, Neonotonia and Stylosanthes were evaluated, by means of morphological, phenological and agronomic characters, in order to select accessions with high seed production, as well as good vegetative growth, and tolerance to pest and disease attack. The experiment was conducted at the Centro de Forragicultura e Pastagens in Nova Odessa, SP. Each accession was represented by a single plot, without replication. Principal component and cluster analysis were conducted for all accessions, and also for groups of accessions representing one or more genera. Through a character discard method, inflorescence length, pod width, tolerance to pest and disease attack, seed production and floral initiation were characters selected based on their discriminatory power. For each cluster analysis, groups containing the highest yielding accessions, according to seed production, vegetative growth an...
Maíces de las Tierras Bajas de América del Sur y Conservación de la Agrobiodiversidad en Brasil y Uruguay, 2020
Nature Ecology & Evolution, 2018
Plant Systematics and Evolution, 2014
The high-altitude Southeastern Brazilian Cattleya coccinea clade includes two taxonomically chall... more The high-altitude Southeastern Brazilian Cattleya coccinea clade includes two taxonomically challenging species, Cattleya coccinea and Cattleya mantiqueirae, the latter considered restricted to the mountain range of Serra da Mantiqueira. To hypothesize the existence of evolutionary independent lineages corresponding to these species, we inferred phylogenetic relationships and described patterns of population genetic diversity and structure of populations from six localities based on ISSR and cpDNA sequence data. Results do not support the species C. coccinea and C. mantiqueirae as previously circumscribed. Most analyses recovered southwestern and northeastern groups along the two mountain ranges, suggesting geography rather than morphology as an important criteria for species delimitation. However, due to the lack of information on the type locality of C. coccinea and the topological complexity of the southwestern area, the taxonomic circumscription of C. coccinea and C. mantiqueirae must be evaluated by additional population sampling. We also propose that the northeastern group comprise at least one distinct species. Also, specimens from Lima Duarte from Serra da Mantiqueira clearly do not belong to neither of the two groups and demand further investigation concerning a possible hybridization scenario of C. coccinea/C. mantiqueirae and C. brevipedunculata. Population genetic patterns of variation are in agreement with pollination observations for this group and with a drift-selection model of speciation. Owing to the high genetic differences among populations, with low levels of variation within populations, conservation priorities should favour protecting as many populations as possible.
... Oral administration of 0.5 to 2 g/kg of Sv-SL to rats and mice induced ptosis, reduced sponta... more ... Oral administration of 0.5 to 2 g/kg of Sv-SL to rats and mice induced ptosis, reduced spontaneous ...DI ROSA, M.; GIROUD, JP; WILLOUGHBY, DA Studies of mediators of the acute inflammatory response induced in rats in ... 24. Sesban (A) Sesbania sesban (L.) Merril (Sesban) Cv ...
Este libro es una invitación a navegar por los caminos recorridos por el maíz en las Tierra Bajas... more Este libro es una invitación a navegar por los caminos recorridos por el maíz en las Tierra Bajas de América del Sur en la antigüedad y la actualidad. En este viaje, interactuaremos con los pueblos indígenas, hablaremos con los agricultores, aprenderemos sobre la investigación genética y lingüística, y sobre cómo este cultivo está estrechamente relacionado con la historia humana en el continente americano. Se sabe que, en sus muchas variedades, el maíz ha sido el alimento básico no solo de los pueblos andinos, desde tiempos inmemoriales, sino también de los pueblos de la Amazonía, la Caatinga, el Cerrado, el Bosque Atlántico, el Pantanal y la Pampa brasileña y uruguaya. Transformado en poesía por Cora Coralina, en filosofía por Rubem Alves, quien compara la maduración humana con la transfiguración del maíz pisingallo (popcorn) en una «flor blanca y suave», y considerado alimento sagrado por el Candomblé, el maíz nos alimenta y también alimenta a nuestros animales, se convierte en una muñeca de juguete para los niños, lleva los depósitos de abundancia, y promueve celebraciones de agradecimiento, especialmente en el mes de junio, época de la cosecha. ¡El maíz es pura bendición! En América Central y también en las Tierras Altas de América del Sur, el maíz tiene muchos registros relacionados con la historia, los mitos y ritos. De los muchos que tuve la oportunidad de conocer, destaco el mito de la creación de humanos a partir del maíz, que se encuentra en la tradición del pueblo maya, cuyos dioses habrían tratado previamente de humanizar la arcilla y la madera, sin éxito, como en el poema de Ana Abel. La gran diferencia del viaje que haremos al leer este libro será conocer la historia del maíz y cómo se dispersó desde la Amazonía hasta llegar a Uruguay. Las poblaciones precolombinas que vivían en esta región de las Américas fueron muy espléndidas en la construcción de carreteras y el maíz, acompañando a los humanos, llegó y se pudo encontrar ampliamente en los principales biomas de América del Sur. La agrobiodiversidad también está representada en este libro, que renueva conceptos científicamente consolidados sobre las razas de maíz, presenta la conservación en los sistemas agrícolas tradicionales, incluye semillas criollas y la diversidad de nuestro principal cultivo nativo: la mandioca. Para promover el diálogo de estos conceptos con el conocimiento de los pueblos indígenas y los agricultores que manejan esta diversidad cada temporada, estudios etnobotánicos en todos los biomas enriquecen el conocimiento aquí presentado. El libro finaliza con experiencias inspiradoras para el manejo de la agrobiodiversidad. Conoceremos la creatividad y la pasión involucradas en los trabajos que expanden y conservan la diversidad genética, que actualmente están llevando a cabo los pueblos indígenas, las comunidades tradicionales y los agricultores familiares. Aquí usted aprenderá, se inspirará y viajará… sírvase el pop (que también en este libro usted conocerá mejor) y siga con nosotros en estos caminos renovadores. Dr.a Patrícia Bustamante – Embrapa Alimentos e Territórios
Plants
Astrocaryum aculeatum, a palm tree incipiently domesticated from upland ecosystems in the Brazili... more Astrocaryum aculeatum, a palm tree incipiently domesticated from upland ecosystems in the Brazilian Amazon, is especially adapted to anthropized areas. The pulp of the fruit, obtained by extractivism, is consumed fresh by the Amazonian population. The objective of the study is to evaluate the diversity and genetic structure of the natural populations of A. aculeatum, exploited by extractive farmers in Amazonas, Brazil, seeking to suggest conservation and management strategies for this species. A total of 218 plants were sampled in 15 populations in 14 municipalities in the state of Amazonas, evaluated by 12 microsatellite loci. A total of 101 alleles were observed. The means of the observed heterozygosities (HO = 0.6390) were higher than expected (HE = 0.557), with high levels of heterozygotes in the populations. The fixation index in the loci and populations was negative. The FST (0.07) and AMOVA showed moderate population structure. Bayesian analysis indicated the grouping k = 4 a...
<p>Colors are according to the probability of occurrence of <i>Bixa orellana</i>... more <p>Colors are according to the probability of occurrence of <i>Bixa orellana</i> var. <i>urucurana</i> simulated by Ecological Niche Modeling (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198593#pone.0198593.g005" target="_blank">Fig 5</a>). Red = very high probability, yellow = high probability and green = moderate probability.</p
Annals of Botany
Background and Aims The lowlands of South America appear to be remarkably important in the evolut... more Background and Aims The lowlands of South America appear to be remarkably important in the evolutionary history of maize, due to new evidence that suggests that maize dispersed from Mexico and arrived in this region in a state of partial domestication. This study aimed to identify dispersal patterns of maize genetic diversity in this part of the continent. Methods A total of 170 maize accessions were characterized with 4398 single nucleotide polymorphisms (SNPs) and analysed to determine if maize dispersal was associated with types of endosperm and indigenous language families. Key Results Four genetic groups were identified in the discriminant analysis of principal components and five groups in the cluster analysis (neighbour-joining method). The groups were structured according to the predominance of endosperm types (popcorn, floury, flint/semi-flint). Spatial principal component analysis of genetic variation suggests different dispersal patterns for each endosperm type and can be...
The Brazilian palm fruits and hearts-of-palm of Euterpe edulis, E. oleracea and E. precatoria are... more The Brazilian palm fruits and hearts-of-palm of Euterpe edulis, E. oleracea and E. precatoria are an important source for agro-industrial production, but overexploitation requires conservation strategies to maintain genetic diversity. Chloroplast genomes have conserved sequences, which are useful to explore evolutionary questions. Besides the plastid DNA, genome skimming allows the identification of other genomic resources, such as single nucleotide polymorphisms (SNPs), providing information about the genetic diversity of species. We sequenced the chloroplast genome and identified gene content in the three Euterpe species. We performed comparative analyses, described the polymorphisms among the chloroplast genome sequences (repeats, indels and SNPs) and performed a phylogenomic inference based on 55 palm species chloroplast genomes. Finally, using the remaining data from genome skimming, the nuclear and mitochondrial reads, we identified SNPs and estimated the genetic diversity amo...
The morphological characterization related to reproductive aspects and seed production of’ 12 acc... more The morphological characterization related to reproductive aspects and seed production of’ 12 accessions of Calopogonium mucunoides was evaluated. The trial was conducted initially in the green house, in a randomized complete block design with 4 replications, and with the evaluation of cotyledon height (AC) and number of trifoliate leaves (NFT). A field trial was established afterwards in a randomized complete block design with 4 replications, and with individualized plants. The characters time to flowering (IF), pod length (CV), number of seeds per pod (NSV), seed production (PRS), weight of 50 seeds (PS), percentage of well developed seeds (PSG) and germination percentage (G) were evaluated. The data was analysed by using uni and multivariate analysis (principal component and cluster analyses). The genetic parameters: coefficient of genotipic determination (b) and coefficient of genetic variation (CVg) were estimated as well. The accessions showed significant differences (P<0.0...
CIMMYT Research Data & Software Repository Network, Aug 5, 2021
Maíces de las Tierras Bajas de América del Sur y Conservación de la Agrobiodiversidad en Brasil y Uruguay, 2020
Genetics and Molecular Biology, 2000
Ninety-six accessions from the genera Calopogonium, Centrosema, Desmodium, Galactia, Macrotyloma,... more Ninety-six accessions from the genera Calopogonium, Centrosema, Desmodium, Galactia, Macrotyloma, Macroptilium, Neonotonia and Stylosanthes were evaluated, by means of morphological, phenological and agronomic characters, in order to select accessions with high seed production, as well as good vegetative growth, and tolerance to pest and disease attack. The experiment was conducted at the Centro de Forragicultura e Pastagens in Nova Odessa, SP. Each accession was represented by a single plot, without replication. Principal component and cluster analysis were conducted for all accessions, and also for groups of accessions representing one or more genera. Through a character discard method, inflorescence length, pod width, tolerance to pest and disease attack, seed production and floral initiation were characters selected based on their discriminatory power. For each cluster analysis, groups containing the highest yielding accessions, according to seed production, vegetative growth an...
Maíces de las Tierras Bajas de América del Sur y Conservación de la Agrobiodiversidad en Brasil y Uruguay, 2020
Nature Ecology & Evolution, 2018
Plant Systematics and Evolution, 2014
The high-altitude Southeastern Brazilian Cattleya coccinea clade includes two taxonomically chall... more The high-altitude Southeastern Brazilian Cattleya coccinea clade includes two taxonomically challenging species, Cattleya coccinea and Cattleya mantiqueirae, the latter considered restricted to the mountain range of Serra da Mantiqueira. To hypothesize the existence of evolutionary independent lineages corresponding to these species, we inferred phylogenetic relationships and described patterns of population genetic diversity and structure of populations from six localities based on ISSR and cpDNA sequence data. Results do not support the species C. coccinea and C. mantiqueirae as previously circumscribed. Most analyses recovered southwestern and northeastern groups along the two mountain ranges, suggesting geography rather than morphology as an important criteria for species delimitation. However, due to the lack of information on the type locality of C. coccinea and the topological complexity of the southwestern area, the taxonomic circumscription of C. coccinea and C. mantiqueirae must be evaluated by additional population sampling. We also propose that the northeastern group comprise at least one distinct species. Also, specimens from Lima Duarte from Serra da Mantiqueira clearly do not belong to neither of the two groups and demand further investigation concerning a possible hybridization scenario of C. coccinea/C. mantiqueirae and C. brevipedunculata. Population genetic patterns of variation are in agreement with pollination observations for this group and with a drift-selection model of speciation. Owing to the high genetic differences among populations, with low levels of variation within populations, conservation priorities should favour protecting as many populations as possible.
... Oral administration of 0.5 to 2 g/kg of Sv-SL to rats and mice induced ptosis, reduced sponta... more ... Oral administration of 0.5 to 2 g/kg of Sv-SL to rats and mice induced ptosis, reduced spontaneous ...DI ROSA, M.; GIROUD, JP; WILLOUGHBY, DA Studies of mediators of the acute inflammatory response induced in rats in ... 24. Sesban (A) Sesbania sesban (L.) Merril (Sesban) Cv ...
Este libro es una invitación a navegar por los caminos recorridos por el maíz en las Tierra Bajas... more Este libro es una invitación a navegar por los caminos recorridos por el maíz en las Tierra Bajas de América del Sur en la antigüedad y la actualidad. En este viaje, interactuaremos con los pueblos indígenas, hablaremos con los agricultores, aprenderemos sobre la investigación genética y lingüística, y sobre cómo este cultivo está estrechamente relacionado con la historia humana en el continente americano. Se sabe que, en sus muchas variedades, el maíz ha sido el alimento básico no solo de los pueblos andinos, desde tiempos inmemoriales, sino también de los pueblos de la Amazonía, la Caatinga, el Cerrado, el Bosque Atlántico, el Pantanal y la Pampa brasileña y uruguaya. Transformado en poesía por Cora Coralina, en filosofía por Rubem Alves, quien compara la maduración humana con la transfiguración del maíz pisingallo (popcorn) en una «flor blanca y suave», y considerado alimento sagrado por el Candomblé, el maíz nos alimenta y también alimenta a nuestros animales, se convierte en una muñeca de juguete para los niños, lleva los depósitos de abundancia, y promueve celebraciones de agradecimiento, especialmente en el mes de junio, época de la cosecha. ¡El maíz es pura bendición! En América Central y también en las Tierras Altas de América del Sur, el maíz tiene muchos registros relacionados con la historia, los mitos y ritos. De los muchos que tuve la oportunidad de conocer, destaco el mito de la creación de humanos a partir del maíz, que se encuentra en la tradición del pueblo maya, cuyos dioses habrían tratado previamente de humanizar la arcilla y la madera, sin éxito, como en el poema de Ana Abel. La gran diferencia del viaje que haremos al leer este libro será conocer la historia del maíz y cómo se dispersó desde la Amazonía hasta llegar a Uruguay. Las poblaciones precolombinas que vivían en esta región de las Américas fueron muy espléndidas en la construcción de carreteras y el maíz, acompañando a los humanos, llegó y se pudo encontrar ampliamente en los principales biomas de América del Sur. La agrobiodiversidad también está representada en este libro, que renueva conceptos científicamente consolidados sobre las razas de maíz, presenta la conservación en los sistemas agrícolas tradicionales, incluye semillas criollas y la diversidad de nuestro principal cultivo nativo: la mandioca. Para promover el diálogo de estos conceptos con el conocimiento de los pueblos indígenas y los agricultores que manejan esta diversidad cada temporada, estudios etnobotánicos en todos los biomas enriquecen el conocimiento aquí presentado. El libro finaliza con experiencias inspiradoras para el manejo de la agrobiodiversidad. Conoceremos la creatividad y la pasión involucradas en los trabajos que expanden y conservan la diversidad genética, que actualmente están llevando a cabo los pueblos indígenas, las comunidades tradicionales y los agricultores familiares. Aquí usted aprenderá, se inspirará y viajará… sírvase el pop (que también en este libro usted conocerá mejor) y siga con nosotros en estos caminos renovadores. Dr.a Patrícia Bustamante – Embrapa Alimentos e Territórios
Plants
Astrocaryum aculeatum, a palm tree incipiently domesticated from upland ecosystems in the Brazili... more Astrocaryum aculeatum, a palm tree incipiently domesticated from upland ecosystems in the Brazilian Amazon, is especially adapted to anthropized areas. The pulp of the fruit, obtained by extractivism, is consumed fresh by the Amazonian population. The objective of the study is to evaluate the diversity and genetic structure of the natural populations of A. aculeatum, exploited by extractive farmers in Amazonas, Brazil, seeking to suggest conservation and management strategies for this species. A total of 218 plants were sampled in 15 populations in 14 municipalities in the state of Amazonas, evaluated by 12 microsatellite loci. A total of 101 alleles were observed. The means of the observed heterozygosities (HO = 0.6390) were higher than expected (HE = 0.557), with high levels of heterozygotes in the populations. The fixation index in the loci and populations was negative. The FST (0.07) and AMOVA showed moderate population structure. Bayesian analysis indicated the grouping k = 4 a...
<p>Colors are according to the probability of occurrence of <i>Bixa orellana</i>... more <p>Colors are according to the probability of occurrence of <i>Bixa orellana</i> var. <i>urucurana</i> simulated by Ecological Niche Modeling (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198593#pone.0198593.g005" target="_blank">Fig 5</a>). Red = very high probability, yellow = high probability and green = moderate probability.</p
Annals of Botany
Background and Aims The lowlands of South America appear to be remarkably important in the evolut... more Background and Aims The lowlands of South America appear to be remarkably important in the evolutionary history of maize, due to new evidence that suggests that maize dispersed from Mexico and arrived in this region in a state of partial domestication. This study aimed to identify dispersal patterns of maize genetic diversity in this part of the continent. Methods A total of 170 maize accessions were characterized with 4398 single nucleotide polymorphisms (SNPs) and analysed to determine if maize dispersal was associated with types of endosperm and indigenous language families. Key Results Four genetic groups were identified in the discriminant analysis of principal components and five groups in the cluster analysis (neighbour-joining method). The groups were structured according to the predominance of endosperm types (popcorn, floury, flint/semi-flint). Spatial principal component analysis of genetic variation suggests different dispersal patterns for each endosperm type and can be...
The Brazilian palm fruits and hearts-of-palm of Euterpe edulis, E. oleracea and E. precatoria are... more The Brazilian palm fruits and hearts-of-palm of Euterpe edulis, E. oleracea and E. precatoria are an important source for agro-industrial production, but overexploitation requires conservation strategies to maintain genetic diversity. Chloroplast genomes have conserved sequences, which are useful to explore evolutionary questions. Besides the plastid DNA, genome skimming allows the identification of other genomic resources, such as single nucleotide polymorphisms (SNPs), providing information about the genetic diversity of species. We sequenced the chloroplast genome and identified gene content in the three Euterpe species. We performed comparative analyses, described the polymorphisms among the chloroplast genome sequences (repeats, indels and SNPs) and performed a phylogenomic inference based on 55 palm species chloroplast genomes. Finally, using the remaining data from genome skimming, the nuclear and mitochondrial reads, we identified SNPs and estimated the genetic diversity amo...
The morphological characterization related to reproductive aspects and seed production of’ 12 acc... more The morphological characterization related to reproductive aspects and seed production of’ 12 accessions of Calopogonium mucunoides was evaluated. The trial was conducted initially in the green house, in a randomized complete block design with 4 replications, and with the evaluation of cotyledon height (AC) and number of trifoliate leaves (NFT). A field trial was established afterwards in a randomized complete block design with 4 replications, and with individualized plants. The characters time to flowering (IF), pod length (CV), number of seeds per pod (NSV), seed production (PRS), weight of 50 seeds (PS), percentage of well developed seeds (PSG) and germination percentage (G) were evaluated. The data was analysed by using uni and multivariate analysis (principal component and cluster analyses). The genetic parameters: coefficient of genotipic determination (b) and coefficient of genetic variation (CVg) were estimated as well. The accessions showed significant differences (P<0.0...
![Research paper thumbnail of Genetic structure and diversity identify incipient domestication of Piquiá [Caryocar villosum (Aubl.) pers.] along the lower Tapajós River, Brazilian Amazonia](https://attachments.academia-assets.com/67340575/thumbnails/1.jpg)
](Genetic Resources and Crop Evolution, 2021
In Amazonia there are at least 85 arboreal species with domesticated populations, among which piq... more In Amazonia there are at least 85 arboreal species with domesticated populations, among which piquia´ [Caryocar villosum (Aubl.) Pers.] is widely distributed. In some regions, there is ethnobotanical evidence of domestication for its fruit. To understand more about piquia´ domestication, we evaluated genetic diversity and structure of two regions, sampling 130 trees in forests and homegardens (92 trees in the Tapajo´s National Forest and 38 in the Rio Ouro Preto Extractive Reserve), using seven microsatellite markers. In Tapajo´s, piquia´ trees form large aggregations near archaeological sites, while in Ouro Preto the aggregations are smaller. The Tapajo´s presented higher effective number of alleles, allelic richness and expected heterozygosity, with lower observed heterozygosity and, consequently, a higher fixation index and lower apparent outcrossing rate. Genetic structure exists between regions, forming four probable groups: one that corresponds mainly to Ouro Preto and the others in the Tapajo´s. When the Tapajo´s was analyzed separately, we found four genetic groups that do not correspond to homegarden and forest systems. In the homegardens we found lower number of effective alleles, allelic richness and observed heterozygosity. These subtle differences in genetic diversity between homegarden and forest trees identify piquia´’s incipient domestication, agreeing with ethnobotanical evidence. The piquia´ stands near archaeological sites and the existence of four genetic groups suggest that piquia´ was introduced into the Tapajo´s during pre-Columbian times from at least three different sources.