scholarly journals Genetic variability in the brazilian criollo horse breed

2003 ◽  
Vol 33 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Myriam Elizabeth Vinocur ◽  
Karin Erica Brass ◽  
Mara Iolanda Batistella Rubin ◽  
Carlos Antonio Mondino Silva
Keyword(s):  
Genetic Variability ◽  
Rio Grande ◽  
Blood Groups ◽  
Rio Grande Do Sul ◽  
Average Heterozygosity ◽  
Horse Breed ◽  
Allelic Frequencies ◽  
Blood Types ◽  
Inbreeding Level

Allelic frequencies of 7 blood groups and 8 protein systems were determined in 6 herds of Criollo horse breed raised in Rio Grande do Sul, Brazil. Analysis of these frequencies showed a significant isolation component (Fst = 0.0866; p<0.01) and construction of dendogram using Nei´s D confirmed this difference among the 6 herds. The highest values measuring genetic variability on 15 blood types were average heterozygosity: 0.4631; total number of alleles: 87 and probability of exclusion: 98%. When all herds were considered together, the inbreeding level (Fis) was zero. These results indicate that the Criollo horses have a large genetic variability.

scholarly journals Genetic variability and social structure of colonies in Acromyrmex heyeri and A. striatus (Hymenoptera: Formicidae)

2001 ◽  
Vol 61 (4) ◽  
pp. 667-678 ◽  
Author(s):  
E. DIEHI ◽  
A. M. de ARAÚJO ◽  
S. CAVALLI-MOLINA
Keyword(s):  
Genetic Variability ◽  
Social Structure ◽  
Rio Grande ◽  
Genotypic Diversity ◽  
Inbreeding Coefficient ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Nuptial Flight ◽  
The Social ◽  
Leaf Cutting

The breeding structure of both colony and population of social insects can be examined by genetic analysis. Colonies of the leaf-cutting ants Acromyrmex heyeri and A. striatus (Myrmicinae, Attini) were thus analyzed for isoenzyme systems MDH, a-GPDH, and AMY to describe genotype variability and social structure. A total of five loci were investigated (three for amylase and one for each other system). Ninety-seven colonies of A. heyeri and 103 of A. striatus were sampled in different localities in Southern Brazil (State of Rio Grande do Sul). The genotypes found show the occurrence of monogyny and polygyny associated or not with polyandry, which indicates that the social organization is colony-specific. The polygyny and polyandry observed are likely to be responsible for the great genotypic diversity of the colonies. The average inbreeding coefficient per colony was higher in A. striatus than in A. heyeri, which may reflect the different patterns of production of sexual individuals and nuptial flight of those two species.

scholarly journals Genetic diversity and conservation of native populations of Maytenus Ilicifolia Mart. ex Reiss

2009 ◽  
Vol 69 (2) ◽  
pp. 447-453 ◽  
Author(s):  
AJ. Mossi ◽  
RL. Cansian ◽  
O. Leontiev-Orlov ◽  
JL. Cechet ◽  
AZ. Carvalho ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Molecular Markers ◽  
Genetic Variability ◽  
Rio Grande ◽  
Jaccard Coefficient ◽  
Rio Grande Do Sul ◽  
Mato Grosso ◽  
Native Populations ◽  
Maytenus Ilicifolia ◽  
Mato Grosso Do Sul

The aim of this work was to analyze genetic variability in 18 populations of Maytenus ilicifolia, and representatives of Maytenus aquifolia and Maytenus evonymoidis, collected in the states of Mato Grosso do Sul, Paraná, Santa Catarina and Rio Grande do Sul, using RAPD molecular markers. Considering total samples of the three species, 263 amplified fragments were identified, of which 72.2% showed to be polymorphous. The index of similarity (Jaccard coefficient) was on average 0.64 between M. ilicifolia and M. aquifolia; 0.47 between M. ilicifolia and M. evonymoidis; and 0.44 between M. aquifolia and M. evonymoidis. The analysis of groupings by the UPGMA algorithm allowed to clearly separate the three analyzed species. In determining the variability in M. ilicifolia, 222 bands were identified, on average 11.1 bands per primer, being 43.2% polymorphous. The index of similarity (Jaccard coefficient) in the bulks of each population in M. ilicifolia was, on average, 0.92 and the index of similarities among the populations was 0.83. The analysis of groupings with the UPGMA algorithm and the analysis of the main coordination (PCO), allowed the separation of the analyzed populations into three groups, the populations from the south of Rio Grande do Sul and the population from Mato Grosso do Sul standing out. A relation between the groupings found and the edaphoclimatic conditions of the collecting places was observed.

scholarly journals Temporal changes in genetic variability in three bumblebee species from Rio Grande do Sul, South Brazil

Apidologie ◽  
2018 ◽  
Vol 49 (3) ◽  
pp. 415-429 ◽  
Author(s):  
Kevin Maebe ◽  
Laura Golsteyn ◽  
Patrícia Nunes-Silva ◽  
Betina Blochtein ◽  
Guy Smagghe
Keyword(s):  
Genetic Variability ◽  
Rio Grande ◽  
Temporal Changes ◽  
Rio Grande Do Sul ◽  
Bumblebee Species ◽  
South Brazil

scholarly journals Forage characters of different Paspalum species in Rio Grande do Sul: a meta-analysis

2017 ◽  
Vol 47 (7) ◽  
Author(s):  
Larissa Arnhold Graminho ◽  
Miguel Dall’Agnol ◽  
Luciana Pötter ◽  
Rodrigo Ramos Lopes ◽  
Carine Simioni ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Mass Production ◽  
Meta Analysis ◽  
Rio Grande ◽  
Dry Mass ◽  
Rio Grande Do Sul ◽  
Pasture Production ◽  
Forage Plants ◽  
Natural Pasture ◽  
Leaf Dry Mass

ABSTRACT: The objective of this study was to evaluate, through meta-analysis, the forage characteristics of various species of the genus Paspalum and to use them to select the best ecotypes that can be used in artificial hybridization as parents and hybrids for pasture production and natural pasture recovery systems. Data were obtained from studies conducted by the Department of Forage Plants and Agrometeorology of the Universidade Federal do Rio Grande do Sul. Database comprised tests conducted with ecotypes and/or hybrids of Paspalum spp. in plots for evaluating total dry mass production, leaf dry mass production, and stem dry mass production by means of cuts. Total dry mass production, which included leaves and stems, differed between the ecotypes and hybrids. Hybrid H12 was the most divergent of all evaluated accessions. The greatest genetic divergence occurred due to dry mass production. Hybrids showed high total dry mass production, comprised mainly of leaves. Hybrid H12 and the accession of Paspalum lepton 28E were identified as the most dissimilar based on the generalized Mahalanobis distance using Tocher’s method. Total dry mass production is the characteristic that most contributed to the detection of genetic variability.

scholarly journals LEVANTAMENTO DA DISPERSÃO E VARIABILIDADE GENÉTICA DE Tectococcus ovatus (HETEROPTERA: ERIOCOCCIDAE) NAS REGIÕES DE OCORRÊNCIA NATURAL DE Psidium cattleianum (MYRTACEAE)

FLORESTA ◽  
2013 ◽  
Vol 43 (2) ◽  
pp. 289
Author(s):  
Luciene Erica Cordeiro Ranuci ◽  
Josiane de Carvalho Vitorino ◽  
Tracy Johnson ◽  
Marcelo Diniz Vitorino
Keyword(s):  
Biological Control ◽  
Genetic Variability ◽  
Rio De Janeiro ◽  
Biological Control Agent ◽  
Rio Grande ◽  
Control Agent ◽  
Rio Grande Do Sul ◽  
Santa Catarina ◽  
Psidium Cattleianum ◽  
Different Populations

 A espécie Psidium cattleianum é considerada uma das maiores ameaças ao ecossistema e à biodiversidade nas ilhas do Havaí. Buscando controlar sua disseminação, adotaram-se técnicas de controle biológico. Dentre as várias espécies estudadas como agente de controle, Tectococcus ovatus (Heteroptera: Eriococcidae) apresentou o maior nível de especificidade. Este trabalho teve como objetivo verificar a existência de variabilidade genética entre e dentro das diferentes populações de Tectococcus ovatus amostradas, utilizando a técnica de PCR-RAPD. As análises foram realizadas a partir de fêmeas coletadas nos estados do Rio de Janeiro, Paraná, Santa Catarina e Rio Grande do Sul. Dos oito iniciadores de PCR-RAPD testados, quatro foram utilizados nas análises, revelando marcadores monomórficos e polimórficos com uma freqüência variável, tanto para os indivíduos de uma mesma localidade quanto para os indivíduos de localidades diferentes. Através da análise de agrupamento de caracterização molecular, foi possível verificar a formação de dois grupos distintos, A e B, apresentando uma variabilidade genética de 44%. Os resultados obtidos através da análise dos marcadores RAPD foram úteis na verificação de variação e forneceram informações sobre os níveis de variabilidade e similaridade entre e dentro das diferentes populações de Tectococcus ovatus.Palavras-chave:  Controle biológico; variabilidade genética; PCR-RAPD. AbstractSurvey of dispersal and genetic variability of Tectococcus ovatus (Heteroptera: Eriococcidae) in the regions of natural occurence of Psidium cattleianum (Myrtaceae). The species Psidium cattleianum is considered one of the greatest threats to the ecosystem and biodiversity of the islands from Hawaii. Seeking to control its dissemination, techniques of biological control were used. Among the various species studied, as a biological control agent, Tectococcus ovatus showed a higher level of specificity. This work had as its aim to verify the existence of genetic variability among and inside different populations of Tectococcus ovatus sampled, using the technique of PCR-RAPD. The analyses were made from females collected in the states of Rio de Janeiro, Paraná, Santa Catarina and Rio Grande do Sul. From the eight initiators of PCR-RAPD tested, four were used in the analyses, revealing monomorphic and polimorphic markers with a variable frequency, to the individuals of one place as well as to the individuals of different places. Through the analysis of the grouping of molecular characterization it was possible to verify a formation of two distinctive groups A and B, presenting a genetic variability of 44%. The results obtained through the analysis of RAPD markers were useful to variation verification and provided safe information about the levels of variability and similarity amongst and inside the different populations of Tectococcus ovatus.Keywords:  Biological control; genetic variability; PCR-RAPD.

scholarly journals Sample size for single, double and thee-way hybrid corn ear traits

2007 ◽  
Vol 64 (1) ◽  
pp. 30-35 ◽  
Author(s):  
Lindolfo Storck ◽  
Sidinei José Lopes ◽  
Alberto Cargnelutti Filho ◽  
Luiz Fernando Dias Martini ◽  
Melissa Pisaroglo de Carvalho
Keyword(s):  
Genetic Variability ◽  
Sample Size ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Hybrid Corn ◽  
Grain Length ◽  
Santa Maria ◽  
Adequate Sample Size ◽  
Ear Number

Using adequate sample size in experimental units improves the efficiency of the research. In the agricultural year of 2004/2005, an experiment was conducted in Santa Maria, Rio Grande do Sul State, Brazil, with the objective of estimating sample size for the following traits: ear length, ear and cob diameter, ear weight, weight of grains per ear, cob weight and the weight of 100 grains, number of grain rows per ear, number of grains per ear and length of grains for two single hybrids (P30F33 and P Flex), two three-way hybrids (AG8021 and DG501) and two double hybrids (AG2060 and DKB701) of maize. For a 5% (D5) precision, the weight traits (dehusked ear weight, weight of grains per ear, cob weight and weight of 100 grains) can be sampled with 21 ears; the size traits (ear length, ear diameter, cob diameter and grain length) with eight ears; and the number traits (number of grain and rows) with 13 ears. Sample size varies as a function of ear trait and the type of hybrid i.e. single, three-way or double. Genetic variability among ears does not correspond to the increasing genetic variability i.e. single, three-way and double for the sample size of traits per ear.

Conservation of an equine feral breed: the Asturcón Pony

1997 ◽  
Vol 22 ◽  
pp. 29-42
Author(s):  
J.L. Vega ◽  
A. Molina ◽  
M. Valera ◽  
P. P. Rodriguez-Gallardo
Keyword(s):  
Genetic Variability ◽  
Horseback Riding ◽  
Future Perspectives ◽  
Average Heterozygosity ◽  
High Genetic Variability ◽  
Allelic Frequencies ◽  
Equestrian Sports ◽  
The Creation

SummaryThe Asturcón Pony was on the verge of disappearing during the decade of the 1970. The creation of A. C. P. R. A (Breeders Association of Asturcón Ponies) and the measures undertaken by this association have made possible the present population of 400 of these animals and future perspectives for them to be bred at large for agrotourism and children's training in horseback riding and other equestrian sports. In spite of the fact that the recovery of the breed is being carried out with few individuals, our results show a high genetic variability. Analysing the allelic frequencies of blood polymorphism, we have obtained an average heterozygosity of 0.3649±0.1070 akin to that of other ponies such as the Dartmoor (0.3396±0.1060), Shetland (0.3158±0.1246 or the Connemara (0.3797±0.1000) and even superior to breeds such as the P. S. I. (0.2857±0.1194) and the Arabian (0.2299±0.0969).

Estudo da Dispersão do Monóxido de Carbono Associado a Emissão Veicular na Região Metropolitana de Porto Alegre com o Sistema de Modelagem Numérica CCATT - BRAMS

2020 ◽  
Author(s):  
Karen Leandra ávila da Silva ◽  
Marcelo Félix Alonso ◽  
Sabrina Feltes de Moura ◽  
Túlio Felipe Verdi Filho
Keyword(s):  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Porto Alegre

Resumo O monitoramento contínuo da qualidade do ar local é extremamente importante para a gestão ambiental de uma cidade, mas nem sempre viável pelo alto custo dos equipamentos. Por conta disso, investe-se muito na utilização da modelagem numérica no estudo da qualidade do ar, que é altamente dependente de inventários de emissões dos poluentes e seus precursores. Nesse contexto o objetivo deste trabalho foi realizar um estudo da dispersão do monóxido de carbono (CO) na Região Metropolitana de Porto Alegre, no estado do Rio Grande do Sul, utilizando o sistema de modelagem numérica CCATT-BRAMS, com ênfase nas fontes veiculares. Foram analisados dois períodos - janeiro de 2009 e janeiro de 2016 - utilizando-se as informações dos inventários de gases precursores elaborados pela FEPAM para os anos base de 2009 e 2013, respectivamente, distribuídos espacialmente com o auxílio do pré-processador de emissões PREP-CHEM-SRC utilizado pelo CCATT-BRAMS. No geral, as simulações representaram coerentemente os dados observados pela rede de monitoramento, com RMSE abaixo de 0,3 na maioria das estações avaliadas. Análises de sensibilidade também revelaram que, para o período avaliado, aproximadamente 40% da concentração de CO sobre a cidade de Porto Alegre foi devido ao transporte de larga escala, proveniente das cidades localizadas ao norte, dentro da Região Metropolitana.

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