Efeito do hormônio juvenil III em fêmeas e machos de Melipona quadrifasciata (Hymenoptera, Apidae): características morfométricas

• Ano de defesa: 2011
• Autor(a) principal: Simões, Talitta Guimarães
• Orientador(a): Campos, Lúcio Antonio de Oliveira
• Banca de defesa: Mucci, Georgina Maria de Faria
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Entomologia
• Departamento: Ciência entomológica; Tecnologia entomológica
• País: BR
• Palavras-chave em Português: Melipona quadrifasciata; Hormônio juvenil; Machos diplóides; Determinação das castas; Morfometria
• Palavras-chave em Inglês: Melipona quadrifasciata; Juvenile hormone; Diploid males; Determination of the castes; Morphometry
• Área do conhecimento CNPq: CNPQ::CIENCIAS BIOLOGICAS
• Link de acesso: http://locus.ufv.br/handle/123456789/3924

The bees of Melipona genus have trofogenetic mechanism to determination of caste. The level of juvenile hormone (JH) in several stages of larval development determines the characteristics of females. Diploid males and females of Melipona quadrifasciata that, in last instar larvae, received topical JH develop external morphological characteristics of queen. This work was based on morphometric data to investigate the effect of JH III in the development of haploid and diploid males of Melipona quadrifasciata and compare morphological characteristics of them with morphological characteristics already known in females of this species. Ten individuals were used for each treatment; workers, natural queens, queens produced from the topical application of JH, natural haploid males, haploid males received application of JH but did not differ, haploid males that received topical application of JH and developed features of queens (QLM - Queen-Like Male), natural diploid males, diploid males that received topical application of JH but did not differ and diploid QLM. The anatomical averages analyzed were: width of compound eyes, width of tibia, length of mouthparts, length of mandible, intertegule distance and interorbit distance. All averages allowed the separation of individuals into groups. However, the lengths of the mouthpart averages were differences most significantly between treatments. Natural queens and queens produced from the effect of JH had similar averages. Diploid and haploid QLM showed average variables with similar size in the natural queens and queens produced from topical application of JH. Workers were more similar to males than the queens in the most averages variables and, in general, the workers presented average size more than queens. Natural diploid and haploid males had close averages, which does not allow visual differentiation of these individuals. The dates confirm that the JH is primarily responsible for the differentiation of specific characteristics of each caste, and, in the high levels of it causes the appearance of the characteristics of queen, independent on genotype.