Research Note

Related GMR Articles

04/29/2008
Asteraceae; Eremanthus erythropappus; Genetic diversity; pioneer species; succession; “Candeia”

Eremanthus erythropappus, commonly known as “candeia”,is an abundant pioneer tree species, forming dense populations known as “candeial”, but it is also found in forests at middle stages of succession. Trees from forests are bigger and occur in lower density than in the “candeial”. The objectives of the present study were to investigate if the decrease in population density during ... more

V.L.O. Freitas; J.P. Lemos-Filho; M.B. Lovato
07/22/2008
Amplified fragment length polymorphism; Genetic diversity; Jackfruit; Markers; Polymorphism

Artocarpus heterophyllus Lam., commonly called jackfruit, is a medium-sized evergreen tree that bears high yields of the largest known edible fruit. Yet, it has been little explored commercially due to wide variation in fruit quality. The genetic diversity and genetic relatedness of 50 jackfruit accessions were studied using amplified fragment length polymorphism markers. Of 16 primer ... more

S. Shyamalamma; S.B.C. Chandra; M. Hegde; P. Naryanswamy
08/05/2008
Aspergillus flavus; Genetic diversity; Inter-simple sequence repeats; Internal transcribed spacer; Molecular markers; Random amplified polymorphic DNA

The Aspergillus genus belongs to a filamentous fungal group characterized by wide dispersion in the environment. Some species are associated with diseases, especially in immunocompromised patients, while others are of economical importance due to aflatoxin production or biotechnological applications. Its species identification is nowadays performed by traditional techniques combined ... more

P.P. Batista; J.F. Santos; N.T. Oliveira; A.P.D. Pires; C.M.S. Motta; E.A.LunaAlves Lima
02/19/2008
Amphibia; Anthropogenic; Cytogenetic; Genetic diversity; Leptodactylidae; Random amplified polymorphic DNA

Cytogenetic and random amplified polymorphic DNA analyses carried out in the species Leptodactylus podicipinus, L. ocellatus, L. labyrinthicus, and L. fuscus from rural and urban habitats of the northwest region of São Paulo State, Brazil, showed that the karyotypes (2n = 22), constitutive heterochromatin distribution and nucleolus organizer region ... more

M.P. Arruda; E. Morielle-Versute
12/08/2011
Genetic diversity; Mapped SSR; Sea-island cotton

In order to evaluate the genetic diversity of sea-island cotton (Gossypium barbadense), 237 commonly mapped SSR markers covering the cotton genome were used to genotype 56 sea-island cotton accessions. A total of 218 polymorphic primer pairs (91.98%) amplified 361 loci, with a mean of 1.66 loci. Polymorphism information content values of the SSR primers ranged from 0.035 to 0. ... more

X.Q. Wang; C.H. Feng; Z.X. Lin; X.L. Zhang
12/20/2011
Aegiphilla sellowiana; Genetic conservation; Genetic diversity; RAPD; Riparian population; Tropical tree

The Tibagi River, located in southern Brazil, is associated with a significant degree of environmental heterogeneity, along its 550 km extension. There is concern about the integrity of this river’s ecosystem, as human interference has been increasing. Aegiphila sellowiana (Lamiaceae) is an important pioneer tree species, commonly found near rivers; the fruit is consumed by ... more

C. Medri; E.A. Ruas; C.F. Ruas; P.S. Medri; M.E. Medri; P.M. Ruas
11/29/2011
Genetic diversity; Molecular marker; Piper; RAPD; SRAP

Random amplified polymorphic DNA (RAPD) and sequence-related amplified polymorphism (SRAP) analysis were applied to 74 individual plants of Piper spp in Hainan Island. The results showed that the SRAP technique may be more informative and more efficient and effective for studying genetic diversity of Piper spp than the RAPD technique. The overall level of genetic ... more

Y. Jiang; J.P. Liu
10/13/2011
Esterase polymorphism; Genetic diversity; Soybean

We used native polyacrylamide gel electrophoresis to identify polymorphism levels in a- and b-esterase loci from leaf tissues of Brazilian soybean cultivars for the analysis of population genetic diversity and structure, and to investigate relationships between conventional and genetically modified cultivars. The cultivars included lines developed by a soybean-grower cooperative (CD), by ... more

L.C. Valentini; C.A. Mangolin; S.A.O. Collet; M.F.P.S. Machado
09/23/2011
Annona crassiflora; Genetic diversity; Northern of Minas Gerais

Genetic diversity analyses of tropical tree species are relevant to landscape management, plant genetic resource inventory, and biological conservation of threatened species. Annona crassiflora is an endangered fruit tree native to the Cerrado biome that is threatened by reduction of natural populations and fruit extraction. We examined the intra- and interpopulational genetic ... more

L.G. Cota; F.A. Vieira; A.F.Melo Júnior; M.M. Brandão; K.N.O. Santana; M.L. Guedes; D.A. Oliveira
10/06/2011
Coffea; Discriminant analysis; Genetic diversity; Microsatellite marker

Coffee is one of the main agrifood commodities traded worldwide. In 2009, coffee accounted for 6.1% of the value of Brazilian agricultural production, generating a revenue of US$6 billion. Despite the importance of coffee production in Brazil, it is supported by a narrow genetic base, with few accessions. Molecular differentiation and diversity of a coffee breeding program were assessed ... more

R.F. Missio; E.T. Caixeta; E.M. Zambolim; G.F. Pena; L. Zambolim; L.A.S. Dias; N.S. Sakiyama

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