Consulta: subjectFacets:"Genetic conservation"
Registros recuperados: 10
Data/hora: 10/06/2024 08:46:59

Mating system in a natural population of Theobroma grandiflorum (Willd. ex Spreng.) Schum., by microsatellite markers
Provedor de dados: 74
Autores: Alves,Rafael M.; Artero,Angela S.; Sebbenn,Alexandre M.; Figueira,Antonio.
The aim of this research was to study the mating system of a natural population of Theobroma grandiflorum (cupuassu) from Nova Ipixuna, Pará state, using microsatellite markers. Eight polymorphic microsatellite loci were analyzed in eight families, each represented by 10 six-month old seedlings derived from open-pollinated pods. The estimation for the multilocus outcrossing rate (&lt;img border=0 id="_x0000_i1026" src="../../img/revistas/gmb/v26n3/a25img01.gif" align=absmiddle&gt;m = 1.0) and individual outcrossing rate (&lt;img border=0 id="_x0000_i1027" src="../../img/revistas/gmb/v26n3/a25img01.gif" align=absmiddle&gt; = 1.0) for this population suggests that T. grandiflorum may be a perfect outbreeding (allogamous) species. Likewise, for the studied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonia; Germplasm; Cupuassu; Genetic conservation; Simple sequence repeat.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300025

Population structure, fluctuating asymmetry and genetic variability in an endemic and highly isolated Astyanax fish population (Characidae)
Provedor de dados: 74
Autores: Gross,Maria Claudia; Schneider,Carlos Henrique; Matiello,Mara Cristina de Almeida; Leite,Maysa de Lima; Bertollo,Luiz Antonio Carlos; Artoni,Roberto Ferreira.
Morphological and chromosomal markers were used to infer the structure and genetic variability of a population of fish of the genus Astyanax, geographically isolated at sinkhole 2 of Vila Velha State Park, Paraná, Brazil. Two morphotypes types were observed, the standard phenotype I and phenotype II which showed an anatomical alteration probably due to an inbreeding process. Fluctuating asymmetry (FA) analysis of different characters showed low levels of morphological variation among the population from sinkhole 2 and in another population from the Tibagi river (Paraná, Brazil). The Astyanax karyotype was characterized in terms of chromosomal morphology, constitutive heterochromatin and nucleolar organizer regions. Males and females presented similar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Astyanax sp.; Fluctuating asymmetry; Karyotype structure; Triploidy; Genetic conservation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400011

Conservation implications of the mating system of the Pampa Hermosa landrace of peach palm analyzed with microsatellite markers
Provedor de dados: 74
Autores: Picanço-Rodrigues,Doriane; Astolfi-Filho,Spartaco; Lemes,Maristerra R.; Gribel,Rogerio; Sebbenn,Alexandre M.; Clement,Charles R.
Peach palm (Bactris gasipaes) is cultivated by many indigenous and traditional communities from Amazonia to Central America for its edible fruits, and is currently important for its heart-of-palm. The objective of this study was to investigate the mating system of peach palm, as this is important for conservation and breeding. Eight microsatellite loci were used to genotype 24 open-pollinated progenies from three populations of the Pampa Hermosa landrace maintained in a progeny trial for genetic improvement. Both the multi-locus outcrossing rates (0.95 to 0.99) and the progeny level multi-locus outcrossing rates (0.9 to 1.0) were high, indicating that peach palm is predominantly allogamous. The outcrossing rates among relatives were significantly different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bactris gasipaes; Bi-parental inbreeding; Genetic improvement; Genetic conservation; Outcrossing.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000100059

Analysis by RAPD of the genetic structure of Astyanax altiparanae (Pisces, Characiformes) in reservoirs on the Paranapanema River, Brazil
Provedor de dados: 74
Autores: Leuzzi,Maria Sueli Papa; Almeida,Fernanda Simões de; Orsi,Mário Luís; Sodré,Leda Maria Koelblinger.
In this study, the RAPD technique was used to analyze the genetic structure of populations of the fish Astyanax altiparanae (Characidae, Tetragonopterinae) living in the lower, middle and upper Paranapanema River, Brazil. The aim was to assess this structure regarding fish handling and conservation programs. The genetic variability (P) was found to be 42.64%, 75% and 75% in the low, middle and upper reaches, respectively. The dendrogram of genetic similarity, obtained by comparative analysis of the sets of samples from the three sites, showed the formation of three clusters. All of the genetic parameters used indicate that the population in the lower Paranapanema is genetically different from those in the middle and upper sections. The theta P test shows...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astyanax altiparanae; RAPD; Genetic structure; Genetic conservation; Fish.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300009

Distribution and habitat of brazilian-pine according to global climate change
Provedor de dados: 190
Autores: Wrege, Marcos Silveira; Fritzsons, Elenice; Soares, Márcia Toffani Simão; Bognola, Itamar Antônio; Sousa, Valderês Aparecida de; Sousa, Letícia Penno de; Gomes, João Bosco Vasconcellos; Aguiar, Ananda Virgínia de; Gomes, Gustavo Crizel; Matos, Maria de Fátima Silva; Scarante, Andressa Godinho; Ferrer, Rogério Soares.
Araucaria angustifolia (Bertol.) O. Kuntze., also known as brazilian-pine, is a forest native species from Brazil. A. angustifolia is more vulnerable to global climate change, considering it is living in cold and humid mountain regions from southern and southeastern Brazil. Among the native Brazilian forest species, it presents one of the greatest growth and genetic gain potential. It shows excellent wood quality and can still be used in human and animal food, presenting great economic, social and environmental value. In order to determine current distribution of the species and better know its habitat, we worked in the regions representing the borders of natural occurrence, identifying populations and getting trees altitude and geographycal position....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic conservation; Global warming; Geographical distribution conservação genética; Melhoramento vegetal; Agrometeorologia; Biogeografia Conservação genética; Aquecimento global; Distribuição geográfica.
Ano: 2017
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1413

โครงการความหลากหลายทางชีวภาพของด้วงมูลสัตว์ในพื้นที่เขื่อนสิรินธร: รายงานวิจัยฉบับสมบูรณ์
Provedor de dados: 106
Autores: Yupa Hanboonsong.
Diversity of dung beetles was studied from 3 different forest sites from Sirinthorn Dam area in Unbonrachathanee province. A total of forty five pig dung baited traps (fifteen traps/site) were used to trap dung beetles from the three studied sites per time. Data were collected five times between January – September 2011. A total of  8,763 dung beetle individuals was found. Among those 7,130 was diurnal beetle and 1,633 was nocturnal beetle. A total of 68 species from 7 genera as Aphodius, Caccobius,  Catharsius, Copris, Paragymnopleurus, Synapsis and Onthophagus. The genus Onthophagus was the most abundant with 56 species. The Shannon-Wiener diversity index (H’) of diurnal and nocturnal dung beetle was highest at the first forest site of savanna mixed...
Tipo: PhysicalObject
Palavras-chave: Diversity index; Dung beetle; Genetic conservation; Sirinthorn dam; ด้วงมูลสัตว์; ดัชนีความหลากหลาย; การอนุรักษ์พันธุกรรม; ความหลากหลายทางชีวภาพ; ชนิด; จำนวนประชากร; เขื่อนสิรินธร.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5344

Transferability of heterologous primers in Brycon falcatus
Provedor de dados: 36
Autores: PENHA,Diego dos Santos; SOUZA,Felipe Pinheiro de; LIMA,Ed Christian Suzuki de; URREA-ROJAS,Angela Maria; PANDOLFI,Victor César Freitas; YAMACHITA,Andrei Lincoln; POVH,Jayme Aparecido; LEITE,Natalia Gonçalves; PEREIRA,Ulisses de Pádua; LOPERA-BARRERO,Nelson Mauricio.
ABSTRACT The genusBryconcomprises fish species of significant socioeconomic and biological importance in Brazil. Despite that, the genetic knowledge about these species is scarce, especially regardingBrycon falcatus. Thus, the objective of this study was to evaluate the transferability of heterologous microsatellite primers inB. falcatus for the first time. Heterologous primers obtained from B. opalinus, B. hilarii, B. insignis, B. orbignyanus, B. amazonicus, Prochilodus argenteus, Prochilodus lineatus, Piaractus mesopotamicus, and Colossoma macropomum were evaluated. The primers that showed the best amplification patterns were applied to a sample of 22 individuals and the genetic parameters were calculated. Nine primers displayed satisfactory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bryconidae; Cross amplification; Genetic conservation; Genetic variability; SSR.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000300232

Outcrossing rate of Couratari multiflora (J.Smith) Eyma (Lecythidaceae), a low-density tropical tree species from a central Amazonian rainforest
Provedor de dados: 36
Autores: Lepsch-Cunha,Nadja; Kageyama,Paulo Yoshio; Vencovsky,Roland; Nascimento,Henrique E. M.
A multilocus mixed-mating model was used to evaluate the mating system of a population of Couratari multiflora, an emergent tree species found in low densities (1 individual/10 ha) in lowland forests of central Amazonia. We surveyed and observed phenologically 41 trees in an area of 400 ha. From these, only four mother trees were analyzed here because few of them set fruits, which also suffered high predation. No difference was observed between the population multilocus outcrossing rate (t mp = 0.953 ± 0.040) and the average single locus rate (t sp = 0.968 ± 0.132). The four mother trees were highly outcrossed (t m ~ 1). Two out of five loci showed departures from the Hardy-Weinberg Equilibrium (HWE) expectations, and the same results occurred with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mating system; Couratari spp.; Genetic conservation; Amazon.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672011000100018

Genetics and expected selection gain for growth traits in Eugenia dysenterica DC. populations
Provedor de dados: 53
Autores: Aguiar,Ananda Virginia de; Vencovsky,Roland; Chaves,Lázaro José; Moura,Mara Fernandes; Morais,Lizz Kezzy de.
The objective of this study was to estimate genetic parameters of quantitative traits in a living germplasm collection of Eugenia dysenterica. The genetic material consisted of 110 progenies derived from 10 natural Eugenia dysenterica subpopulations sampled in the southeastern region of the state of Goiás. The experiment was established in a complete randomized block design, with 110 treatments, four replications and one tree per plot. The study variables were total height, stem diameter and respective growth rates. After the analysis of variance some genetic parameters were estimated. The levels of genetic variation in the collection were high and the highest proportion was found within subpopulations. Highest coefficients of heritability and genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eugenia dysenterica; Pre-breeding or screening; Genetic conservation; Cerrado; Genetic parameters; Heritability.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052009000300009

Forest inventory and the genetic diversity of the remaining fragment of Hymenaea courbaril L.
Provedor de dados: 64
Autores: Melo,Marília Freitas de Vasconcelos; Alvares-Carvalho,Sheila Valéria; Souza,Erica Moraes Santos de; Gois,Itamara Bomfim; Ferreira,Robério Anastácio; Silva-Mann,Renata.
ABSTRACT Hymenaea courbaril is a rare species in the riparian areas of the state of Sergipe, Brazil. This species is known as Brazilian cherry or Brazilian copal and it occurs in fragments of the Rainy Forest and in the transition zones between the Rainy Forest and the Caatinga Biomes. This work was carried out, in order to quantify the genetic diversity of the remaining population of Brazilian cherry, by RAPD markers. In a studied area of 100 ha in the low course of the São Francisco River, only 15 individuals were observed. The analyzed parameters were as follows: Jaccard’s genetic similarity, the number of observed alleles, the number of effective alleles, the genetic diversities of Nei, the percentages of the polymorphic loci, the genetic diversities...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic conservation; Seed collection; Spatial correlation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000500491