Research Article

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This is the first study to examine the genetic diversity of mandacaru cactus (Cereus jamacaru P. DC.). Plants of spineless mandacaru are commonly found in gardens and parks of urban areas in northeastern Brazil. In addition to exploring their ornamental potential, morphological, and genetic characterization may contribute to the development of plant materials that can be used as ... more

F.I.C. Oliveira; P.N. Bordallo; A.C.R. Castro; D. Correia
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Biodiversity; Conservation planning; Genetic variability; Metaheuristics; Multi-objective optimization

Biodiversity crises have led scientists to develop strategies for achieving conservation goals. The underlying principle of these strategies lies in systematic conservation planning (SCP), in which there are at least 2 conflicting objectives, making it a good candidate for multi-objective optimization. Although SCP is typically applied at the species level (or hierarchically higher), it ... more

S. Schlottfeldt; M.E.M.T. Walter; A.C.P.L.F. Carvalho; T.N. Soares; M.P.C. Telles; R.D. Loyola; J.A.F. Diniz-Filho
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Argentine Creole; Genetic variability; Heterozygosity; Horses; Serum protein polymorphysm; Thoroughbred

Genetic polymorphism was analyzed for five blood proteins: albumin - Al, esterase - Es, α1B-glycoprotein - Xk, transferrin - Tf and hemoglobin - Hb in 200 Thoroughbred (TB) and 124 Argentine Creole (AC) horses. Of the five systems examined, Tf and Hb were not in Hardy-Weinberg equilibrium in either breed and Es was not in equilibrium in the Creole breed. Genetic ... more

S. Díaz; F.N. Dulout; P. Peral-García
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Gene flow; Genetic variability; Mating strategies; Nellore; Population structure

Parameters based on the probability of gene origin were used to describe genetic variability in three reproductive groups from the Breeding Program for Nellore Cattle (PMGRN). The three reproductive populations (cows in reproductive age, bulls from artificial insemination centers and young bulls in progeny test) generated medium to low values. The effective number of founders (N ... more

P.A. Vozzi; C.R. Marcondes; L.A.F. Bezerra; R.B. Lôbo
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Genetic variability; Pomacentridae; Pomacentrinae; Random amplified polymorphic DNA; Stegastes

The family Pomacentridae comprises about 326 species belonging to 28 genera. The genus Stegastes is composed of nearly 33 species, and 8 are endemic to the Brazilian Province, inhabiting the Brazilian coast (Stegastes fuscus, S. variabilis, S. leucosticus, S. uenfi, and S. pictus) or Western Atlantic oceanic islands (S. trindadensis ... more

E.A. Dias; A.S. Souza; W.F. Molina
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Genetic variability; Microsatellites; Nuclear molecular markers; Population structure; Wading bird

Roseate Spoonbills (Platalea ajaja, Linnaeus) are wading birds present in two of the most important Brazilian wetlands: the Pantanal wetlands and Rio Grande do Sul marshes. Natural populations of these species have not been previously studied with variable nuclear molecular markers. In order to support decision making regarding the management and conservation of these populations, we ... more

C.I. Miño; S.N. Del Lama
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Genetic heterogeneity; Genetic variability; Ochlerotatus taeniorhynchus; Polymorphic microsatellite loci; Venezuelan equine encephalitis virus

In Colombia, the mosquito Ochlerotatus taeniorhyn­chus has been identified as an efficient vector of the epidemic-epi­zootic Venezuelan equine encephalitis virus. We evaluated the ge­netic variability and heterogeneity of this mosquito in Colombian populations using eight microsatellite DNA loci. Two hundred and ten mosquito specimens collected from seven populations of the Co­ ... more

F. Bello; V. Becerra
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Genetic variability; Internal transcribed spacer; Melipona quinquefasciata; nuclear ribosomal DNA; Stingless bee

Melipona quinquefasciata is a ground-nesting South American stingless bee whose geographic distribution was believed to comprise only the central and southern states of Brazil. We obtained partial sequences (about 500-570 bp) of first internal transcribed spacer (ITS1) nuclear ribosomal DNA from Melipona specimens putatively identified as M. quinquefasciata collected ... more

J.O.P. Pereira; B.M. Freitas; D.M.M. Jorge; D.C. Torres; C.E.A. Soares; T.B. Grangeiro
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Bothrops moojeni; conservation genetics; Genetic structure; Genetic variability; RAPD; Vipers

Bothrops moojeni is an abundant venomous snake responsible for most of the snakebite cases in the Central region of Brazil and as a result of the anthropogenic habitat disturbance, such as the increase in extensive farming, the range of B. moojeni has been greatly fragmented. Here, we obtained genomic DNA from a total of 75 snakes belonging to four populations. Genetic ... more

N.C.L. Dutra; M.P.C. Telles; D.L. Dutra; N.J.Silva Júnior
06/10/2008
Biomphalaria; Genetic variability; Polymorphism; RAPD-PCR; Schistosomiasis

Schistosomiasis remains one of the most prevalent parasitic infections and has significant economic and public health consequences in many developing countries. Economic development and improvement in standard of living in these countries are dependent on the elimination of this odious disease. For the control of Schistosomiasis, understanding the host/parasite association is important, since ... more

A.L.D. Oliveira; D. Da Silva; E.M. Zanotti-Magalhães; E.M. Zanotti-Magalhães; A.Z. Abdel-Hamid; J.T. Ribeiro-Paes

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