Research Article

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The cursor complex is a group within the Akodon genus of South American rodents, formed by Akodon cursor and A. montensis. Correct distinction between these two species is of great importance since they can harbor different Hantavirus strains. These species are only distinguishable by means of karyotypic or internal anatomic features, requiring ... more

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We evaluated the genetic and physiological variability of Moniliophthora perniciosa obtained from healthy and diseased branches of cacao (Theobroma cacao) plants. The diversity of the isolates was evaluated by RAPD technique and by studies of virulence and exoenzyme production. The genetic variability of endophytic and pathogenic M. perniciosa was evaluated in ... more

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L.P. Marouelli; P.W. Inglis; M.A. Ferreira; G.S.C. Buso
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Genetic variability; ISSR; Mandacaru; morphology; RAPD

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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The fig (Ficus carica L.) is a fruit tree of great world importance and, therefore, the genetic improvement becomes an important field of research for better crops, being necessary to gather information on this species, mainly regarding its genetic variability so that appropriate propagation projects and management are made. The improvement programs of fig trees using ... more

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Diversity; Genetic structure; Germplasm conservation; Helianthus tuberosus; RAPD

Jerusalem artichoke (Helianthus tuberosus) is a wild relative of the cultivated sunflower (H. annuus); it is an old tuber crop that has recently received renewed interest. We used RAPD markers to characterize 147 Jerusalem artichoke accessions from nine countries. Thirty RAPD primers were screened; 13 of them detected 357 reproducible RAPD bands, of which 337 were ... more

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Bipolaris sorokiniana; Genetic variability; RAPD; Wheat

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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

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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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