Research Article

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06/30/2009
Molecular markers; Single sequence repeats; Stingless bees

Many factors have contributed to reductions in wild populations of stingless bees, such as: deforestation, displacement and destruction of nests by honey gatherers, as well as use of insecticides and other agrochemicals. All of these can potentially affect the populational structure of native species. We analyzed genetic variability and populational structure of Melipona scutellaris, ... more

G.A. Carvalho-Zilse; M.F.F. Costa-Pinto; C.G. Nunes-Silva; W.E. Kerr
05/12/2009
Behavior; Communication; Mixed colony; Nestmate recognition; Stingless bees

We describe a case of a spontaneously established mixed colony of two species of stingless bees. The host colony of Scaptotrigona depilis, an aggressive bee that forms large colonies, was invaded by workers of Nannotrigona testaceicornis, a smaller bee that forms small colonies. The host colony and the invading species colony were maintained in next boxes about 1.5 m apart. ... more

C. Menezes; M. Hrncir; W.E. Kerr
05/12/2009
greenhouse; pollination; Stingless bees; strawberry

We investigated the success of two stingless bee species in pollinating strawberries in greenhouses. Three greenhouses and one open field area were used; one greenhouse had only strawberry plants (control), another (G1) had three colonies of Scaptotrigona aff. depilis and another (G2) had three colonies of Nannotrigona testaceicornis. In the open field area, the ... more

A.C. Roselino; S.B. Santos; M. Hrncir; L.R. Bego
06/09/2009
colony size; Melipona bicolor; pollen foragers; queen numbers; seasonality; Stingless bees

We evaluated the ratio between the number of pollen foragers and the total number of bees entering colonies of Melipona bicolor, a facultative polygynous species of stingless bees. The variables considered in our analysis were: seasonality, colony size and the number of physogastric queens in each colony. The pollen forager ratios varied significantly between seasons; the ratio was ... more

S.D. Hilário; V.L. Imperatriz-Fonseca
05/19/2009
Hygienic behavior; Melipona beecheii; Meliponini; Scaptotrigona pectoralis; Stingless bees

Hygienic behavior, a trait that may confer resistance to brood diseases in the honey bee Apis mellifera, was studied in two species of stingless bees in Mexico. Eight colonies each of Melipona beecheii and Scaptotrigona pectoralis were tested for hygienic behavior, the removal of dead or diseased brood, by freeze killing a comb of sealed cells containing pupae. Both ... more

L.M. Medina; A.G. Hart; F.L.W. Ratnieks
06/02/2009
Hygienic behavior; Plebeia remota; Stingless bees

We investigated hygienic behavior in 10 colonies of Plebeia remota, using the pin-killed method. After 24 h the bees had removed a mean of 69.6% of the dead brood. After 48 h, the bees had removed a mean of 96.4% of the dead brood. No significant correlation was found between the size of the brood comb and the number of dead pupae removed, and there was no apparent effect of the ... more

P. Nunes-Silva; V.L. Imperatriz-Fonseca; L.S. Gonçalves
05/18/2010
AFLP; Population differentiation; Species-specific marker; SSCP; Stingless bees; Trigona collina

A molecular maker for authenticating species origin of the stingless bee (Trigona collina) was developed. Initially, amplified fragment length polymorphism analysis was made of 11 stingless bee species using 64 primer combinations. A 316-bp band found only in T. collina was cloned and sequenced. A primer pair (CUTc1-F/R) was designed and tested for species-specificity in ... more

M. Theeraapisakkun; S. Klinbunga; S. Sittipraneed
07/25/2014
Amazônia; mtDNA; SSCP; Stingless bee

In countries containing a mega diversity of wildlife, such as Brazil, identifying and characterizing biological diversity is a continuous process for the scientific community, even in face of technological and scientific advances. This activity demands initiatives for the taxonomic identification of highly diverse groups, such as stingless bees, including molecular analysis strategies. ... more

M.T. Souza; G.A. Carvalho-Zilse
04/28/2016
Bayesian inference; Gibbs sampling; Heart failure; Markov chain Monte Carlo; Molecular functions

We identified disturbed pathways in heart failure (HF) based on Gibbs sampling combined with pathway enrichment analysis. A total of 396 Markov chains (MCs) (gene count >5) were obtained. After Gibbs sampling, six differentially expressed molecular functions (DEMFs) (possibility ≥0.8) were obtained. As statistical analysis was performed on the number of individual differentially ... more

P. Chen; L.H. Guo; Y.K. Guo; Z.J. Qu; Y. Gao; H. Qiu; P. Chen; L.H. Guo; Y.K. Guo; Z.J. Qu; Y. Gao; H. Qiu
11/30/2019
Bayesian inference; Genetic improvement; Plant breeding; Statistical methods

We compared two statistical methodologies applied to genetic and genomic analyses of categorical traits. The first one consists of a Bayesian approach to the Bayesian Linear Mixed Model (BLMM), which addresses the statistical problems of genomic prediction. The second methodology, called Bayesian Generalized Linear Mixed Model (BGLMM) is similar, but it is used ... more

L.S. Silveira; M. Filho; C.F. Azevedo; E.C. Barbosa; M.D.V. Resende; E.K. Takahashi

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