The purpose of this study was to select top cross hybrids of green maize for yield, derived from partially inbred S1 lines based on genetic values using the REML/Blup method, and to estimate important genetic parameters for green maize breeding programs. The experiment was conducted in an experimental area located between 17º53´ S and 52º43´ W, 680 m altitude. The evaluation of 75 top cross hybrids was performed in a randomized block design with four replicates. A sample of five plants/ears was used in each plot to evaluate grain mass trait (MASS). For commercial ear yield trait (CEYIELD), evaluations were carried out for the total number of plants per plot. Hybrids were selected via BLUP procedures using the Selegen-REML/Blup program. Based on the Restricted Maximum Likelihood (REML), we estimated the coefficients of genetic and residual variation and components of variance, by which a genetic variability between the top cross hybrids was observed. This shows the possibility of successful selection for the traits under evaluation. The estimated accuracy for the selection of top cross hybrids was 0.81 for commercial ear yield and 0.64 for grain mass, pointing to high and moderate precision levels for CEYIELD and MASS traits, respectively, corroborating the possibility of success in selecting top cross hybrids based on the CEYIELD trait. The predicted genetic gain from the selection was 20.12%, for CEYIELD, and 6.10%, for MASS. Therefore, the REML/Blup statistical tool was efficient in selecting top cross hybrids of green maize, providing significant genetic gains for the traits under evaluation. There was evidence that hybrids 19 and 48 were distinguished from others because of the high genetic effects obtained for the commercial ear yield and grain mass weight.

As argilas estão entre as mais importantes matérias-primas devido as suas múltiplas funções industriais. No caso especial da indústria de cerâmica vermelha, as argilas têm ampla utilidade, sendo o principal produto para a fabricação de telhas e blocos cerâmicos, que podem ser incorporados com resíduos industriais. Portanto, o objetivo deste trabalho foi estudar a influencia dos diferentes tipos de argilas na qualidade dos blocos cerâmicos de vedação, incorporados com lodo têxtil, por meio do processo de solidificação/estabilização. Avaliou-se a incorporação do lodo têxtil em 5 tipos de argilas, coletadas na região norte do Paraná, e realizou-se uma análise qualitativa dos blocos cerâmicos, com composição de 15% de resíduo têxtil, em função de suas características, estabelecidas nas normas da Associação Brasileira de Normas Técnicas. O resíduo utilizado foi proveniente de 12 indústrias têxteis de Maringá, PR. Inicialmente foi feita uma caracterização do lodo e das argilas. Os blocos cerâmicos foram fabricados em escala reduzida e submetidos a testes de resistência a compressão, lixiviação, solubilização e absorção de água, de acordo com as respectivas normas. Verificou-se nas condições estudadas que os blocos cerâmicos não apresentaram lixiviação nem solubilização. Portanto, o processo de solidificação/estabilização foi capaz de imobilizar de forma eficaz, os metais presentes no resíduo têxtil, mostrando-se como um promissor processo de minimização do impacto ambiental.

Selecting potential progenies in early inbred generations is an essential step towards the success of breeding programs. Given this, the use of top crosses assists breeders in selecting progenies to generate lines with the potential for hybrid yield. Thus, the purpose of this study was to assess the behavior of partially inbred progenies (S1) of maize with potential for green maize yield in top crosses and to evaluate the hybrid performance. Seventy-five top cross hybrids were generated from the cross between 75 S1 progenies and the F2 generation of the hybrid AG 1051. The 75 hybrids, the male tester (F2 generation of the hybrid AG 1051 as a broad genetic base tester), and the hybrid AG 1051 were sown in a block design with four replicates. The following traits were evaluated: husked ear yield; commercial ear yield; flowering; plant height; strawing; mean weight of grain mass in green maize stage; tassel branch number; ear row number; ear length; and ear diameter. The analysis of variance was performed estimating the general combining ability, and, from the means, the Scott & Knott test was conducted. The top cross hybrids that were prominent for commercial ear yield were those composed of partially inbred progenies 19, 48, 6, 28, and 42 with high GCA, suggesting a potential for the production of open pollination population or synthetic production as well.