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Cytogenetic analysis of the Amazon stingless bee Melipona seminigra merrillae reveals different chromosome number for the genus

Francini, Izaura Bezerra ; Gross, Maria Claudia ; Nunes-Silva, Carlos Gustavo ; Carvalho-Zilse, Gislene Almeida

Scientia agricola, 2011-10, Vol.68 (5), p.592-593 [Periódico revisado por pares]

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Título:
Cytogenetic analysis of the Amazon stingless bee Melipona seminigra merrillae reveals different chromosome number for the genus
Autor: Francini, Izaura Bezerra ; Gross, Maria Claudia ; Nunes-Silva, Carlos Gustavo ; Carvalho-Zilse, Gislene Almeida
Assuntos: AGRICULTURE, MULTIDISCIPLINARY ; cytogenetics ; diploid male chromosomes ; Meliponini ; Neotropics
É parte de: Scientia agricola, 2011-10, Vol.68 (5), p.592-593
Descrição: Cytogenetic analysis of the Amazon stingless bee Melipona seminigra merrillae, by conventional Giemsa staining and C-banding, revealed a different chromosome number for Melipona: 2n = 22 for females and diploid drones while the haploid drones present n = 11. There is no evidence of B chromosomes. This result contrasts with previous studies, in which the chromosome number of 19 Melipona species was determined as 2n = 18 for females and n = 9 for haploid males. Based on cytogenetic information available for other Melipona species, we propose that M. s. merrillae has a more derived diploid number. This indicates that chromosome number is not a conservative characteristic within the genus as previously thought. Cytogenetic data for stingless bees are scarce, especially in Amazon region. Additional studies will be very important in order to promote Melipona karyoevolution discussion and consequently a taxonomy review.
Editor: São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Idioma: Inglês;Português

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