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| Borges,Andreia A.; Humann,Fernanda C.; Campos,Lucio A. Oliveira; Tavares,Mara G.; Hartfelder,Klaus. |
| In Hymenoptera, homozygosity at the sex locus results in the production of diploid males. In social species, these pose a double burden by having low fitness and drawing resources normally spent for increasing the work force of a colony. Yet, diploid males are of academic interest as they can elucidate effects of ploidy (normal males are haploid, whereas the female castes, the queens and workers, are diploid) on morphology and life history. Herein we investigated expression levels of ten caste-related genes in the stingless bee Melipona quadrifasciata, comparing newly emerged and 5-day-old diploid males with haploid males, queens and workers. In diploid males, transcript levels for dunce and paramyosin were increased during the first five days of adult... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stingless bee; Real time PCR; Caste; Diploid male; Differential gene expression. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400025 |
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| Nascimento,Marcília A.; Batalha-Filho,Henrique; Waldschmidt,Ana M.; Tavares,Mara G.; Campos,Lucio A.O.; Salomão,Tânia M.F.. |
| For a study of diversity and genetic structuring in Melipona quadrifasciata, 61 colonies were collected in eight locations in the state of Minas Gerais, Brazil. By means of PCR analysis, 119 ISSR bands were obtained, 80 (68%) being polymorphic. He and H B were 0.20 and 0.16, respectively. Two large groups were obtained by the UPGMA method, one formed by individuals from Januária, Urucuia, Rio Vermelho and Caeté and the other by individuals from São João Del Rei, Barbacena, Ressaquinha and Cristiano Otoni. The Φst and θB values were 0.65 and 0.58, respectively, thereby indicating high population structuring. UPGMA grouping did not reveal genetic structuring of M. quadrifasciata in function of the tergite stripe pattern. The significant correlation between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hymenoptera; Melipona; Genetic differentiation; ISSR markers; Population structure. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000200031 |
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| Lage,Lorena G.A.; Coelho,Lívia L.; Resende,Helder C.; Tavares,Mara G.; Campos,Lucio A.O.; Fernandes-Salomão,Tânia M.. |
| Physicochemical analyses were carried out to evaluate 27 samples of honeys from three species of the Brazilian genus Melipona (M. capixaba, M. rufiventris and M. mondury) from Espírito Santo and Minas Gerais States. The parameters water activity (Aw), percentage of soluble solids (Brix %), pH, acidity (meq/Kg) and moisture (%) were evaluated. The honey characteristics obtained from these samples were very similar to the ones from other Melipona species. However, regarding the honey from Apis (honey bee), only the pH values were similar. The low pH value and the high acidity detected in Melipona honey are potential factors for increasing the honey shelf life because they do not provide favorable conditions for the microbial development. On the other hand,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Honey; Melipona; Meliponini; Physicochemical data. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300003 |
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