Germplasm characterization

ISSR markers in wild species of Passiflora L. (Passifloraceae) as a tool for taxon selection in ornamental breeding

A. G. R. Sousa, Souza, M. M., Melo, C. A. F., and Sodré, G. A., ISSR markers in wild species of Passiflora L. (Passifloraceae) as a tool for taxon selection in ornamental breeding, vol. 14, pp. 18534-18545, 2015.

Inter simple sequence repeat (ISSR) molecular markers were developed and used to investigate interspecific genetic variation in 25 wild species of Passiflora preserved in an active germplasm bank (BAG-Passifloras); intraspecific diversity was also analyzed in P. cincinnata accessions. Of 31 primers tested, 20 identified polymorphic loci with a total of 331 bands, suggesting high polymorphism in the sample. Interspecific polymorphism was greater than intraspecific polymorphism. This is a common finding in studies of genetic variation using dominant markers.

Genetic diversity in sugarcane varieties in Brazil based on the Ward-Modified Location Model clustering strategy

B. P. Brasileiro, Marinho, C. D., Costa, P. M. A., Moreira, E. F. A., Peternelli, L. A., and Barbosa, M. H. P., Genetic diversity in sugarcane varieties in Brazil based on the Ward-Modified Location Model clustering strategy, vol. 13, pp. 1650-1660, 2014.

We evaluated the genetic diversity of 77 clones of sugarcane used in crosses made by the Brazilian interuniversity network for the development of the sugar/energy sector (RIDESA) breeding program. Characterization of the genotypes was carried out at the ratoon stage, based on eight morphological traits and seven agronomic traits. Diversity analysis was carried out beginning with the Ward-Modified Location Model. The ideal number of groups was three. Groups 1, 2, and 3 were composed of 37, 21, and 19 accessions, respectively.

Genetic diversity and coefficient of parentage between clones and sugarcane varieties in Brazil

B. P. Brasileiro, Marinho, C. D., Costa, P. M. A., Peternelli, L. A., Resende, M. D. V., Cursi, D. E., Hoffmann, H. P., and Barbosa, M. H. P., Genetic diversity and coefficient of parentage between clones and sugarcane varieties in Brazil, vol. 13, pp. 9005-9018, 2014.

The success of the development of new sugarcane varieties is associated with the ability to correctly select the genitor. The aim of this study was to evaluate the genetic diversity between 113 clones and sugarcane varieties using the Ward-modified location model procedure with added information about the coefficient of parentage and endogamy. In this study, data was used from 100 experiments that evaluated clones; the experimental phase was conducted in 70 places between the years 2002 and 2009 on the outlining in random blocks.

Genetic variability in domesticated Capsicum spp as assessed by morphological and agronomic data in mixed statistical analysis

C. P. Sudré, Gonçalves, L. S. A., Rodrigues, R., Júnior, A. Tdo Amaral, Riva-Souza, E. M., and C. Bento, dosS., Genetic variability in domesticated Capsicum spp as assessed by morphological and agronomic data in mixed statistical analysis, vol. 9, pp. 283-294, 2010.

Capsicum species are very important in Brazil because of economic, cultural and biological factors, and the country is considered to be a diversity center for this genus. Collection and maintenance of the genetic diversity in Capsicum are important to avoid genetic erosion. Besides the identification of species, the characterization and evaluation of accessions maintained in gene banks are of fundamental importance. For this purpose, multivariate methods have become an important tool in the classification of conserved genotypes.

Genetic diversity in local and commercial dry bean (Phaseolus vulgaris) accessions based on microsatellite markers

P. D. S. Cabral, Soares, T. C. B., Lima, A. B. P., de Miranda, F. D., Souza, F. B., and Gonçalves, L. S. A., Genetic diversity in local and commercial dry bean (Phaseolus vulgaris) accessions based on microsatellite markers, vol. 10, pp. 140-149, 2011.

Dry beans are considered to be a crop of great socio-economic importance, because they are an inexpensive source of nutrients and because their cultivation requires considerable manual labor. Studies of genetic diversity have been very important for genetic improvement programs, because they give parameters for the identification of genitors that can provide large heterosis effects and improved segregation in recombinants, increasing the probability of obtaining superior genotypes in the progeny.

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