Genetic variability

Standardization of a molecular method for epidemiologic identification of Leishmania strains

R. F. Rocha, Menezes, E. V., Xavier, A. R. E. O., Royo, V. A., Oliveira, D. A., Júnior, A. F. M., Dias, E. S., Lima, A. C. V. M. R., Michalsky, E. M., Rocha, R. F., Menezes, E. V., Xavier, A. R. E. O., Royo, V. A., Oliveira, D. A., Júnior, A. F. M., Dias, E. S., Lima, A. C. V. M. R., and Michalsky, E. M., Standardization of a molecular method for epidemiologic identification of Leishmania strains, vol. 15, p. -, 2016.

Molecular studies of the evolutionary relationships among Leishmania species suggest the presence of high genetic variation within this genus, which has a direct effect on public health in many countries. The coexistence of species in a particular region can result in different leishmaniasis clinical forms and treatment responses.

Variability of Colletotrichum spp in common bean

S. F. Mota, Barcelos, Q. L., Dias, M. A., Souza, E. A., Mota, S. F., Barcelos, Q. L., Dias, M. A., Souza, E. A., Mota, S. F., Barcelos, Q. L., Dias, M. A., and Souza, E. A., Variability of Colletotrichum spp in common bean, vol. 15, p. -, 2016.

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 relationship between species of the Colletotrichum genus, which inhabit anthracnose and scab lesions.

Impacts of stocking on the genetic diversity of Colossoma macropomum in central Amazon, Brazil

C. A. de Queiroz, Sousa, N. R., da Silva, G. F., Inoue, L. A. K. A., de Queiroz, C. A., Sousa, N. R., da Silva, G. F., Inoue, L. A. K. A., de Queiroz, C. A., Sousa, N. R., da Silva, G. F., and Inoue, L. A. K. A., Impacts of stocking on the genetic diversity of Colossoma macropomum in central Amazon, Brazil, vol. 15, p. -, 2016.

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 management practices. Genetic diversity of three tambaqui broodstocks in western Amazon was evaluated using molecular markers.

Virulence and genetic diversity among isolates of Mycosphaerella fijiensis in two regions of Brazil

G. F. Silva, Santos, V. S., Sousa, N. R., Hanada, R. E., Gasparotto, L., Silva, G. F., Santos, V. S., Sousa, N. R., Hanada, R. E., Gasparotto, L., Silva, G. F., Santos, V. S., Sousa, N. R., Hanada, R. E., and Gasparotto, L., Virulence and genetic diversity among isolates of Mycosphaerella fijiensis in two regions of Brazil, vol. 15, p. -, 2016.

Black sigatoka, caused by the fungus Mycosphaerella fijiensis (anamorphic stage: Paracercospora fijiensis), was first detected in Brazil in early 1998 in the Benjamin Constant and Tabatinga municipalities in the State of Amazonas, near to where the borders of Brazil, Colombia, and Peru converge. Understanding how cultivars react to the pathogen, and characterizing the genetic variability of isolates from two distant and distinct banana-producing regions, are important for determining the virulence of M. fijiensis.

Genetic relationship between the Nordestino horse and national and international horse breeds

D. A. F. Pires, Coelho, E. G. A., Melo, J. B., Oliveira, D. A. A., Ribeiro, M. N., E. Cothran, G., Juras, R., Pires, D. A. F., Coelho, E. G. A., Melo, J. B., Oliveira, D. A. A., Ribeiro, M. N., E. Cothran, G., Juras, R., Pires, D. A. F., Coelho, E. G. A., Melo, J. B., Oliveira, D. A. A., Ribeiro, M. N., E. Cothran, G., and Juras, R., Genetic relationship between the Nordestino horse and national and international horse breeds, vol. 15, p. -, 2016.

Knowledge of genetic diversity and relationships between breeds is very important for conservation programs. Hair samples were collected from 393 individual Nordestino horses and genotyped using 14 microsatellite markers in order to investigate the genetic relationship between this breed and 66 international horse breeds. There was high allelic diversity and inbreeding coefficient within population values were not significant, which was probably due to crossbreeding.

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