Sexual Segregation
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Advances in the propagation of Jabuticaba tree
Resumo Dentre a família Myrtaceae com representantes espalhados por todo o planeta, a jabuticabeira é uma importante espécie nativa do Brasil e que passou a ser apreciada não só nos limites de quintais e pomares domésticos, mas já pode ser encontrada em pomares comercias, projetos de paisagismo e em vários países com clima tropical e subtropical. A
Rev. Bras. Frutic.. Publicado em: 01/07/2019
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2. Marker-assisted screening of breeding populations of an apomictic grass Cenchrus ciliaris L. segregating for the mode of reproduction
Abstract Cenchrus ciliaris L. is an apomictic forage grass grown in pastures and rangelands of the semi-arid tropics. It reproduces predominantly through apomixis; rarely, obligate sexual plants have also been reported. Absence of sexual reproduction limits the possibility of genetic improvement through hybridization. This study reports on hybridization of a
Crop Breed. Appl. Biotechnol.. Publicado em: 2017-03
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3. Cephalopoda as prey of juvenile Southern elephant seals at Isla 25 de Mayo/King George, South Shetland Islands
The aim of the present study was to enhance the knowledge of the feeding habits of the juvenile component of the population of Southern elephant seals [Mirounga leonina (Linnaeus, 1758)] from Isla 25 de Mayo, South Shetland Islands, age class whose diet information is scarce. A total of 60 individuals were stomach lavaged in the spring - summer seasons of th
Iheringia, Sér. Zool.. Publicado em: 2015-03
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4. Morphological characterization and sex-related differences of the mandible of the armadillos Chaetophractus vellerosus and Zaedyus pichiy (Xenarthra, Dasypodidae), with consideration of dietary aspects
The morphological characteristics of the mandible of adult Chaetophractus vellerosus (Gray, 1865) and Zaedyus pichiy (Desmarest, 1804) were studied to establish its generalized design and to identify inter- and intra- (sexual) specific differences. Morphological descriptions were complemented with the application of univariate and multivariate (analysis of c
Iheringia, Sér. Zool.. Publicado em: 2013-06
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5. Projeto raia de fogo: aspectos populacionais da raia de fogo (Dasyatis marianae Gomes, Rosa &Gadig, 2000) e pesca de elasmobrânquios no complexo recifal do Parracho de Maracajaú
The species Dasyatis marianae inhabits coastal areas associated with coral reefs, considered endemic to the northeast of Brazil, occurring from the State of Maranhão to the south of Bahia. Specimens of this species are commonly sighted by divers and fishermen in the area of Maracajaú reefs, a complex reef that is part of the Environmental Protection Area o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/07/2011
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6. Identification of a molecular marker linked to apomixis in Brachiaria humidicola (Poaceae)
A bulked segregant analysis using RAPD technique was carried out to identify molecular markers linked to apomixis in a Brachiaria humidicola F1 population that segregated 1 : 1 for the mode of reproduction (apomixis and sexual). A marker related to the apo-locus was found. Segregation data, together with this marker were used to generate a map of the region.
Plant Breeding. Publicado em: 2011
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7. Meiotic behavior in Panicum maximum Jacq. (Poaceae: Panicoideae: Paniceae): hybrids and their genitors
Panicum maximum Jacq. is one of the most cultivated grasses in the world. The intraspecific hybridization breeding program underway at Embrapa Beef Cattle aims at combining several agronomic characteristics in a single plant with high seed production. Four intraspecific hybrids originated from the cross between sexual tetraploid female plants with apomictic
Acta Scientiarum Agronomy. Publicado em: 2011
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8. Meiotic behavior in Panicum maximum Jacq. (Poaceae: Panicoideae: Paniceae): hybrids and their genitors.
Panicum maximum Jacq. is one of the most cultivated grasses in the world. The intraspecific hybridization breeding program underway at Embrapa Beef Cattle aims at combining several agronomic characteristics in a single plant with high seed production. Four intraspecific hybrids originated from the cross between sexual tetraploid female plants with apomictic
Acta Scientiarum. Agronomy. Publicado em: 2011
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9. Habitat use patterns of franciscana dolphins (Pontoporia blainvillei) off southern Brazil in relation to water depth
The patterns of habitat use by the franciscana dolphins (Pontoporia blainvillei) along its distribution are poorly known. This study investigates the patterns of habitat use with respect to depth for 181 individuals of different age, size, gender and reproductive condition off Rio Grande do Sul, southern Brazil. The results reveal that franciscanas are very
Publicado em: 2011
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10. Diferenças salariais entre os gêneros no setor público : evolução e principais determinantes / Wage gap between genders in the Brazilian public sector
: O objetivo principal deste trabalho é estudar o hiato de rendimento observado entre os sexos no setor público brasileiro, investigando em que medida ele pode ser atribuído a diferenças nas dotações produtivas dos servidores, ao padrão diferenciado de inserção setorial e ocupacional das mulheres no mercado de trabalho e à discriminação sexual
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2010
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11. OrganizaÃÃo social de elasmobrÃnquios na Reserva BiolÃgica do Atol das Rocas, Brasil
Many animals tend to form social groups, segregating individuals from different classes, such as males and females, adults and subadults, and even large and small specimens of the same species. In order to better understand the behavior of elasmobranches in an insular environment, the social organization of the nurse shark, Ginglymostoma cirratum, (Bonnaterr
Publicado em: 2009
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12. Cytogenetic evidence for genome elimination during microsporogenesis in interspecific hybrid between Brachiaria ruziziensis and B. brizantha (Poaceae)
Microsporogenesis was analyzed in an interspecific hybrid between an artificially tetraploidized sexual accession of Brachiaria ruziziensis (R genome) and a natural apomictic tetraploid accession of B. brizantha (B genome). Chromosomes associated predominantly as bivalents. From this phase to the end of meiosis, chromosomes presented irregular segregation an
Genetics and Molecular Biology. Publicado em: 2006