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The aim of this study was to evaluate the use of pollinator seed mixture to obtain hybrid rice seeds. The study was performed at Embrapa Clima Temperado, in the harvests of 2015/2016 and 2016/2017. Seeds of hybrids H7 and BRS AH 703 CL and the pollinator, Puitá INTA-CL cultivar were used in the proportions of 0.00%, 0.75%, 1.50%, 3.00%, 6.00%, 12.00% and 24.00% in the first year and 0.00%, 0.75%, 1.50%, 3.00%, 6.00%, 12.00% and 24.00%, 50.00% and 100.00% for the second year. The experimental design was a randomized complete block design with four repetitions and the data was submitted to analysis of variance. Seeding was performed in November and October. The plots were 5 meters long with 4 meters of plot area, being evaluated: Number of plants.m-2, Number of culms.m-2, Number of panicles.m-2, Panicle length, Productivity of grain, plot uniformity, plant height, percentage of whole grains, broken grains. Plants from hybrid rice seeds in the mix had no effect on yield components. Plants from hybrid seeds showed plot uniformity like plants from self-fertilization. The industrial quality of the grains was like grains of self-fertilized plants but differing in the intermediate mixtures used. The aim of this study was to evaluate the use of pollinator seed mixture to obtain hybrid rice seeds. The study was performed at Embrapa Clima Temperado, in the harvests of 2015/2016 and 2016/2017. Seeds of hybrids H7 and BRS AH 703 CL and the pollinator, Puitá INTA-CL cultivar were used in the proportions of 0.00%, 0.75%, 1.50%, 3.00%, 6.00%, 12.00% and 24.00% in the first year and 0.00%, 0.75%, 1.50%, 3.00%, 6.00%, 12.00% and 24.00%, 50.00% and 100.00% for the second year. The experimental design was a randomized complete block design with four repetitions and the data was submitted to analysis of variance. Seeding was performed in November and October. The plots were 5 meters long with 4 meters of plot area, being evaluated: Number of plants.m-2, Number of culms.m-2, Number of panicles.m-2, Panicle length, Productivity of grain, plot uniformity, plant height, percentage of whole grains, broken grains. Plants from hybrid rice seeds in the mix had no effect on yield components. Plants from hybrid seeds showed plot uniformity like plants from self-fertilization. The industrial quality of the grains was like grains of self-fertilized plants but differing in the intermediate mixtures used.

It is essential that tests for evaluating seed vigour be faster and increasingly efficient to enable precise differentiation among batches. In this way, it is possible to evaluate the quality of seeds based on the anaerobic metabolism of cells when exposed to environments lacking oxygen. Thus, the objective of this study was to establish methodology for evaluating the viability and vigour of 3 lots of cowpea (Amendoim cultivar) seeds using the ethanol test. The treatments were carried out in a completely randomized design with four replications. For the test, 25 seeds were stored in hermetically sealed PET (Polyethylene the Ethylene) bottles containing 40 ml of distilled water and subjected to 3 soaking times in distilled water (6, 24, and 48 h) at a controlled temperature of 40°C in a germinator. The amount of ethanol produced was quantified with the aid of an adapted breath analyser. The results are expressed as mg L-1; these data were then compared with data for the following: germination; the first germination count; the total length, root length and shoot length of the seedling; dry weight of the seedling; emergence in the field; emergence speed index; and electrical conductivity. The experimental design was completely randomised, and the data were subjected to analysis of variance and correlation analysis. The results were compared using the Tukey test at 5% probability. Measurement of ethanol after 6 or 48 h of soaking at 40°C was effective for determining the viability and vigour of cowpea seeds. As ethanol test results have high correlation with germination and vigour test results, this approach is a viable alternative for analysts and seed producers.

Quinoa (Chenopodium quinoa Willd) an annual grain crop belonging to the Amaranthacea family is the only vegetable food that contains all essential amino acids, micronutrients and vitamins. The study aimed to evaluate the performance, growth and seed physiological quality of two genotypes of quinoa in Southern Rio Grande do Sul region. The cultivar BRS Piabiru and one breeding line were grown at green house. The design was completely randomized with four replications and five harvest times during the vegetative stage of the crop. The variables were shoot length, number of leaves, leaf area index, dry matter of aerial parts, dry matter of root and total dry matter of plant. It was concluded that the line and BRS Piabiru have slow initial growth in the first 30 days and strong growth up to 120 days. The breeding line and commercial cultivar showed the same potential for seed production in the temperate climate of this region.

O trabalho teve como objetivo avaliar o efeito de doses de zinco aplicado em tratamento de sementes sobre a qualidade fisiologica de sementes de feijao e o teor foliar de micronutrientes. O trabalho foi desenvolvido na safra agricola 2014/2015, no laboratorio didatico de analise de sementes, no laboratorio de fertilidade e em area experimental, da Faculdade de Agronomia Eliseu Maciel, da Universidade Federal de Pelotas. Para a realizacao do experimento foi utilizado sementes de feijao cultivar BRS Expedito. Os tratamentos foram constituidos pelas seguintes doses aplicados via sementes com produto a base de Zn, nas doses de 0 (0g Zn), 100 (12,0 g Zn), 200 (24,0g Zn), 300 (36,00g Zn), e 400 (48,00g Zn) mL P.C.100kg -1 de sementes. Foram realizadas avaliacoes na emergencia, indice de velocidade de emergencia, teste de frio, comprimento de parte aerea e radicular, massa seca de parte aerea e radicular de plântulas e determinacao dos teores de micronutrientes. O tratamento de sementes com zinco promove aumento na expressao da qualidade fisiologica de sementes de feijao e tambem aumento no teor foliar do micronutriente.

Chia cultivation is expanding in Brazil, but there is still no standardized test to evaluate the quality of the seeds. Therefore, vigor tests that expose seeds to stress conditions must be standardized. This study aimed to establish the methodology for the accelerated aging test in chia seeds. Six chia seed lots with similar germination behavior were used. They were submitted to germination, first germination count, seedling emergence, emergence speed index and accelerated aging tests. Aging periods of 24, 48, and 72 hours were used in the conventional methodology, and also with the use of unsaturated and saturated sodium chloride (NaCl) solutions. The results obtained from the accelerated aging tests revealed tendencies for lot separation similar to the classification of chia seed lots in relation to the physiological potential obtained in the preliminary quality tests. The accelerated aging test can be used to evaluate the physiological potential of chia seeds by using water or unsaturated saline solution. In the conventional test (water), the seeds should be exposed for 24 hours. When using unsaturated saline solution, the exposure time must be of 48 hours. Resumo: O cultivo de chia está em expansão no Brasil, e ainda não existem testes padronizados para avaliação da qualidade das sementes para esta cultura. Por isso, existe a necessidade de padronização de testes de vigor que exponham as sementes a condições de estresse. O presente trabalho objetivou estabelecer a metodologia do teste de envelhecimento acelerado para sementes de chia. Foram utilizados seis lotes de sementes de chia com similaridade quanto à germinação. Eles foram submetidos aos testes de germinação, primeira contagem de germinação, emergência de plântulas, índice de velocidade de emergência, e envelhecimento acelerado. Foram empregados períodos de envelhecimento de 24, 48 e 72 horas, na metodologia convencional, e com o uso de soluções salina não saturada e saturada de cloreto de sódio (NaCl). Os resultados obtidos nos testes de envelhecimento acelerado revelaram tendências semelhantes na separação dos lotes, quando comparados com a classificação dos lotes de sementes de chia em relação ao potencial fisiológico obtidos nos testes preliminares. O teste de envelhecimento acelerado pode ser empregado na avaliação do potencial fisiológico de sementes de chia, utilizando-se água ou solução salina não saturada. No teste convencional (água), as sementes devem ficar expostas por 24 horas. Ao utilizar solução salina não saturada, o tempo deve ser de 48 horas.

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