Zea mays

Genetic progress in the UNB-2U population of popcorn under recurrent selection in Rio de Janeiro, Brazil

R. M. Ribeiro, Júnior, A. Tdo Amaral, Gonçalves, L. S. A., Candido, L. S., Silva, T. R. C., and Pena, G. F., Genetic progress in the UNB-2U population of popcorn under recurrent selection in Rio de Janeiro, Brazil, vol. 11, pp. 1417-1423, 2012.

As part of the Universidade Estadual do Norte Fluminense recurrent selection program of popcorn, we evaluated full-sib families of the sixth cycle of recurrent selection and estimated genetic progress for grain yield and expansion capacity. We assessed 200 full-sib families for 10 agronomic traits, in a randomized block design, with two replications within sets in two environments: Campos dos Goytacazes and Itaocara, in the State of Rio de Janeiro, Brazil.

Selection of high heterozygosity popcorn varieties in Brazil based on SSR markers

I. B. O. Eloi, Mangolin, C. A., Scapim, C. A., Gonçalves, C. S., and Machado, M. F. P. S., Selection of high heterozygosity popcorn varieties in Brazil based on SSR markers, vol. 11, pp. 1851-1860, 2012.

We analyzed genetic structure and diversity among eight populations of popcorn, using SSR loci as genetic markers. Our objectives were to select SSR loci that could be used to estimate genetic diversity within popcorn populations, and to analyze the genetic structure of promising populations with high levels of heterozygosity that could be used in breeding programs. Fifty-seven alleles (3.7 alleles per locus) were detected; the highest effective number of alleles (4.21) and the highest gene diversity (0.763) were found for the Umc2226 locus.

Stability and adaptability of popcorn genotypes in the State of Rio de Janeiro, Brazil

G. F. Pena, Júnior, A. Tdo Amaral, Gonçalves, L. S. A., Candido, L. S., Vittorazzi, C., Ribeiro, R. M., and Júnior, S. P. Freitas, Stability and adaptability of popcorn genotypes in the State of Rio de Janeiro, Brazil, vol. 11, pp. 3042-3050, 2012.

This study aimed to obtain estimates of stability and adaptability of phase launched materials and materials recommended in the country, for the northern and northwestern regions of Rio de Janeiro State, Brazil, and made a comparative analysis of different methods to evaluate stability and adaptability of grain yield and popping expansion. To this end, 10 genotypes were evaluated (UNB2U-C3, UNB2U-C4, BRS Angela, Viçosa, Beija-Flor, IAC 112, IAC 125, Zélia, Jade, and UFVM2 Barão de Viçosa) in five environments.

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