Genetic Variability
Population structure and genetic diversity in Gynaikothrips uzeli (Thysanoptera: Phlaeothripidae): is there a correlation between genetic and geographic proximity?
Authors: A.L.S. Mascarenhas, A.M. Waldschmidt and J.C. Silva Jr.
Gynaikothrips uzeli (Thysanoptera: Phlaeothripidae) is a minuscule insect species, which forms galls, is subsocial, and parthenogenetic. It is associated with Ficus benjamina L. (Moraceae) and has a pantropical occurrence. The paucity of genetic studies on the order Thysanoptera led us to use inter-simple sequence repeat molecular marker to assess intra- .. Read More»
- Genet. Mol. Res. 14(3):
- 2015.August.19.12
- DOI:
- 10.4238/2015.August.19.12
Endophytic and pathogenic isolates of the cacao fungal pathogen Moniliophthora perniciosa (Tricholomataceae) are indistinguishable based on genetic and physiological analysis
Authors: T.G. Lana, J.L. Azevedo, A.W.V. Pomella, R.T.R. Monteiro, C.B. Silva and W.L. Ara?ºjo
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 evaluat.. Read More»
- Genet. Mol. Res. 10(1):
- vol10-1gmr895
- DOI:
- 10.4238/vol10-1gmr895
Differential gene expression patterns in the autogamous plant Hordeum euclaston (Poaceae)
Authors: J.E. Georg-Kraemer, C.A.S. Ferreira and S.S. Cavalli
Sib-seedlings of 95 strains of the strictly autogamous grass Hordeum euclaston were analyzed by horizontal polyacrylamide gel electrophoresis for four isoenzyme systems at a specific ontogenetic stage. We found differences in the activity of some genes among individuals of this species. Hence, an ontogenetic analysis was carri.. Read More»
- Genet. Mol. Res. 10(1):
- vol10-1gmr1017
- DOI:
- 10.4238/vol10-1gmr1017
Comparison of eight methods of genomic DNA extraction from babassu
Authors: J.P.G. Viana, A.N.C. Borges, A.C.A. Lopes, R.L.F. Gomes, F.B. Britto, P.S.C. Lima and S.E.S. Valente
Babassu (Orbignya phalerata Martius) is one of the most important palms in Brazil because of the largest morphological variation, wide geographic distribution, and high socio-economic importance. The diversity present in babassu germplasm should be protected against loss to ensure their use with high productivity. Study of the available variability in pop.. Read More»
- Genet. Mol. Res. 14(4):
- 2015.December.22.26
- DOI:
- 10.4238/2015.December.22.26
Genetic characterization of papaya plants (Carica papaya L.) derived from the first backcross generation
Authors: H.C.C. Ramos, M.G. Pereira, F.F. Silva, L.S.A. Gon?§alves, F.O. Pinto, G.A. de Souza Filho and T.S.N. Pereira
The limited number of papaya varieties available reflects the narrow genetic base of this species. The use of backcrossing as a breeding strategy can promote increases in variability, besides allowing targeted improvements. Procedures that combine the use of molecular markers and backcrossing permit a reduction of the time req.. Read More»
- Genet. Mol. Res. 10(1):
- vol10-1gmr1004
- DOI:
- 10.4238/vol10-1gmr1004
Genetic diversity and variability in populations of the white wax insect Ericerus pela, assessed by AFLP analysis
Authors: H. Chen, R. He, Z.L. Wang, S.Y. Wang, Y. Chen, Z.C. Zhu and X.M. Chen1
The white wax insect Ericerus pela Chavannes (Hemiptera: Coccoidea) is an economically valuable insect species that has been used for over a thousand years in China. The present study focuses on assessing the genetic variability in different populations of E. pela collected from seven Chinese provinces. The amplified fragment length polymorphism technique.. Read More»
- Genet. Mol. Res. 14(4):
- 2015.December.22.6
- DOI:
- 10.4238/2015.December.22.6
Genetic diversity and structure in natural populations of Maytenus truncata Reiss, 1861, a medicinal plant vulnerable to extractivism in Bahia State, Brazil
Authors: R.R. Simplicio, A.M. Waldschmidt, M.B. Amorim, B.S. Almeida and D.G. Pereira
Maytenus truncata (Celastraceae) is a plant species widely used in the treatment of ulcers and tumors. Despite the intensive harvest of native specimens in the State of Bahia, northeastern Brazil, there is no information about the genetic variability or structure of this species. Therefore, the goal of this study was to estimate the genetic diversity and .. Read More»
- Genet. Mol. Res. 14(4):
- 2015.December.23.11
- DOI:
- 10.4238/2015.December.23.11
Populations of Erythrina velutina Willd. at risk of extinction
Authors: M.F.V. Melo, L.O. Gon?§alves, A.R.C. Rabbani, S.V. ?lvares-Carvalho, J.B. Pinheiro, M.I. Zucchi and R. Silva-Mann
The goal of this study was to characterize the structure of two natural populations of the coral tree using RAPD and ISSR markers. The study evaluated all individuals in two different areas in the northeastern region of Brazil: the first was in the riparian area, 10 km x 100 m along the edge of the lower São Francisco River, and the second was in t.. Read More»
- Genet. Mol. Res. 14(3):
- 2015.August.28.15
- DOI:
- 10.4238/2015.August.28.15
Intraspecific variability of Bipolaris sorokiniana isolates determined by random-amplified polymorphic DNA (RAPD)
Authors: Aida T.S. Matsumura, Ariano M. Prestes, Sueli T. Van Der Sand, Andr?©ia M.R. de Oliveir
Isolates of Bipolaris sorokiniana were analyzed by random-amplified polymorphic DNA (RAPD) techniques to determine the amount of intraspecific genetic variability and to study host-pathogen interactions. Ten isolates originated from different regions of Brazil were examined. Plants of the wheat cultivars BR8, BH1146 (original .. Read More»
- Genet. Mol. Res. 1(4):
Greater genetic variability in Argentine Creole than in Thoroughbred horses based on serum protein polymorphisms
Authors: S. D?az, F.N. Dulout and P. Peral-Garc?a
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 i.. Read More»
- Genet. Mol. Res. 1(3):