Genetic Variability
Genetic diversity in the Pantaneiro horse breed assessed using microsatellite DNA markers
Authors: E.H. Giacomoni, G.P. Fern�¡ndez-Stolz and T.R.O. Freitas
The genetic variability for a sample of 227 animals from three populations of Pantaneiro horses was estimated using data from 10 microsatellite loci. The number of alleles and the proportion of heterozygosity indicated high variability. A total of 91 alleles were found, with a significantly high mean number of alleles. The mea.. Read More»
- Genet. Mol. Res. 7(1):
Resistance of soybean genotypes to Sclerotinia sclerotiorum isolates in different incubation environments
Authors: L.H.S. Castro, A.A. Figueir�³, A.P.O. Nogueira, S.J. Clough and F.C. Juliatti
Sclerotinia sclerotiorum is an important soybean pathogen. The objectives of this study were to evaluate levels of resistance of soybean genotypes to the fungus, and to determine the effects of different incubation environments on host resistance and pathogen aggressiveness. Two experiments were conducted using 103 genotypes f.. Read More»
- Genet. Mol. Res. 15(4):
- gmr15049061
- DOI:
- 10.4238/gmr15049061
Genetic variability in three populations of Hypostomus hermanni (Teleostei: Loricariidae) found in the basins of IvaÃ? River, TietÃ?ª River, and SapucaÃ?Â-Mirim River of Brazil
Authors: R.S. Vieira and E. Renesto
The genetic variability in three populations of Hypostomus hermanni from the tributaries of the rivers Ivaí (Keller), Tietê (Piracicaba), and Sapucaí (Sapucaí-Mirim) was determined using electrophoresis on starch gel. The variability in the genes for eight enzymes, namely, aspartate aminotransferase .. Read More»
- Genet. Mol. Res. 15(4):
- gmr15049056
- DOI:
- 10.4238/gmr15049056
Effect of fragmentation on the natural genetic diversity of Theobroma speciosum Willd. ex Spreng. populations
Authors: T.L. Varella, A.A.B. Rossi, J.F.E. Dardengo, G.F. Silveira, M.D.A. Souza and M.L.S. Carvalho
t fragmentation reduces the effective size of natural populations, isolates individuals in the landscape, and, consequently, changes species’ mating systems by increasing the degree of relatedness between individuals and inbreeding. Investigating the impact of habitat degradation on forest fragments helps to assess the g.. Read More»
- Genet. Mol. Res. 15(4):
- gmr15048630
- DOI:
- 10.4238/gmr15048630
Genetic diversity of Brazilian and introduced olive germplasms based on microsatellite markers
Authors: A.D.B. do Val, J.L. Ferreira, J. Vieira Neto, M. Pasqual, A.F. de Oliveira, A. Bor�©m and G.M.A. Can�§ado
Olive trees have been grown since the beginning of civilization, and the consumption of olives and olive products is increasing worldwide, due to their health benefits and organoleptic qualities. To meet the growing market for olives, commercial cultivation of this species is expanding from traditional areas to new regions. Al.. Read More»
- Genet. Mol. Res. 11(1):
- 2012.March.8.4
- DOI:
- 10.4238/2012.March.8.4
Genetic variation in a wild population of the �sleep� passion fruit (Passiflora setacea) based on molecular markers
Authors: C.B.M. Cerqueira-Silva, E.S.L. Santos, L.D.H.C.S. Concei�§�£o, C.B. Cardoso-Silva, A.S. Pereira, A.C. Oliveira and R.X. Corr�ªa
Little is known about the molecular genetic diversity of most Passiflora species. We used RAPD markers to evaluate the genetic diversity of 24 genotypes of the ‘sleep’ passion fruit (Passiflora setacea). Twelve primers generated 95 markers, 88% of which were polymorphic. The genetic distance estimated by the comple.. Read More»
- Genet. Mol. Res. 11(1):
- 2012.March.22.3
- DOI:
- 10.4238/2012.March.22.3
Genetic divergence and admixture of ancestral genome groups in the sugarcane variety �RB867515� (Saccharum spp
Authors: G.B. Maranho, R.C. Maranho, R. Desordi, A.F. das Neves, C.A. Mangolin and M.F.P.S. Machado
We analyzed 80 plants of the sugarcane (Saccharum spp) variety ‘RB867515’ in order to investigate its diversity and genetic structure at the molecular level. Four simple sequence repeat (SSR) loci (UGSM51, SMC1237, SEGMS1069, and UGSM38) and five expressed sequence tag (EST)-SSR loci (ESTA68, ESTB92, ESTB145, ESTC6.. Read More»
- Genet. Mol. Res. 15(4):
- gmr15049209
- DOI:
- 10.4238/gmr15049209
Genetic variability affecting Exserohilum turcicum resistance in popcorn lines grown under high and low phosphorus conditions
Authors: A.T. Amaral Jr., R.M. Ribeiro, P.H.D. Santos, T.P.S. Poltronieri, J.M.S. Vivas, I.F.S. Gerhardt, B.M. Carvalho, C.S. Freitas and S.B. Miranda
Northern leaf blight (NLB), caused by Exserohilum turcicum, is one of the main foliar diseases that affect popcorn culture. Farmers use many control measures to minimize damage caused by this disease, among which, the use of cultivars with genetic resistance is the most effective and economical. The aim of this study was to in.. Read More»
- Genet. Mol. Res. 15(4):
- gmr15049399
- DOI:
- 10.4238/gmr15049399
Impacts of stocking on the genetic diversity of Colossoma macropomum in central Amazon, Brazil
Authors: C.A. de Queiroz, N.R. Sousa, G.F. da Silva and L.A.K.A. Inoue
Tambaqui (Colossoma macropomum) is the main fish species farmed on a commercial scale in northern Brazil. In view of the current scenario of Brazilian aquaculture, studies on the genetic improvement and reproductive management of captive tambaqui are crucial in identifying the genetic variability of broodstocks and devising ma.. Read More»
- Genet. Mol. Res. 15(2):
- gmr.15027700
- DOI:
- 10.4238/gmr.15027700
Variability of Colletotrichum spp in common bean
Authors: S.F. Mota, Q.L. Barcelos, M.A. Dias and E.A. Souza
The Colletotrichum genus presents large genetic variability, as demonstrated by the occurrence of several pathogenic races and phenotypic traits. The objective of this study was to characterize 22 strains of C. lindemuthianum and Colletotrichum spp recovered from anthracnose lesions and bean scab, and to verify the relationshi.. Read More»
- Genet. Mol. Res. 15(2):
- gmr.15027176
- DOI:
- 10.4238/gmr.15027176