Water deficit (WD) promotes great losses in agriculture, and the development of new sustainable technologies to mitigate effects this stress on plants is essential. This study aimed evaluate morphophysiological biochemical alterations induced by priming tomato seeds with different formulations under field capacity WD conditions. In first experiment, treatments consisted nanoparticles alginate/chitosan chitosan/tripolyphosphate containing gibberellic acid (GA3) concentrations (0.5, 5, 50 µg...

The genetic relationships among 81 maize accessions consisting 79 landraces and two improved varieties, maintained by farmers in southern Brazil were investigated using Random Amplified Polymorphic DNA (RAPD). Thirty-two highly informative primers amplified 255 markers of which 184 (72.2%) polymorphics. Based on the RAPD markers, a dendrogram was constructed UPGMA method. range similarity from 0.78 to 0.91. molecular data grouped into main clusters, correlated according kernel colors. Small...

Some diazotrophic bacteria can fix nitrogen biologically in gramineous host plants. Generally, plants are also associated with mycorrhizal fungi, that improve mainly plant P uptake. Among the factors affecting plant-microbe interactions, genotype plays an important role. This study evaluates effect of and arbuscular fungus (AMF), on five genotypes maize (Zea mays L.), relation to biomass, shoot N concentrations, fine root morphological traits. The experimental design was entirely randomized...

RESUMO O déficit hídrico durante o desenvolvimento do amendoinzeiro prejudica vários processos fisiológicos da planta e reduz sua produtividade. Este estudo objetivou avaliar rendimento de grãos, componentes produção crescimento cultivares linhagens amendoim submetidas a hídrico, em condições campo. delineamento experimental foi blocos ao acaso, com parcelas subdivididas três repetições. Os tratamentos (com sem) constituíram as os genótipos avaliados (IAC Tatu ST, BR1, BRS Havana, Col 72 82)...

The double-haploid technology in maize was developed temperate environments, using germplasm and inducers adapted for these with the aim of accelerating obtaining homozygous inbred lines. Therefore, to advance this tropical research involving environment is necessary. objectives were determine haploidy induction rate common supersweet corn populations, employing a tropicalized gymnogenetic inducer population, identify effectiveness chromosome doubling by colchicine injection. PI4003 used as...

A produção de milho superdoce brasileira é preponderantemente destinada as indústrias conservas, que necessitam elevada produtividade, uniformidade e qualidade produção, oferecidas pelas cultivares híbridas linhagens. tecnologia duplo-haploide (DH) está sendo utilizada para reduzir o tempo linhagens completamente homozigotas melhor explorar a heterose em combinações comum, mas ainda pouco estudada superdoce. Os objetivos foram determinar potencial DHs na síntese híbridos; identificar elites...

Abstract Knowledge about pests is essential for agriculture, as they can cause significant damage to crops. However, it equally important understand the natural enemies that assist farmers in controlling pest insect populations, thereby reducing need inputs and promoting production sustainability. The ability recognize identify even more relevant producers who employ environmentally friendly agroecological-based management techniques, such biological control. Thus, objective of this study...

With the advent of modern agriculture, landrace seeds were replaced by hybrid cultivars, which feature high grain yield potential – though more dependent on intensive technologies. The objective this work was to evaluate maize landraces, in order identify productive materials that can lead a sustainable process grains themselves be used as seed. Fifteen varieties evaluated, with commercial cultivars BR 106 and IPR 114 controls. experiments carried out Arapongas Imbaú (Paraná State), during...

As populações de milho crioulo são importantes patrimônios genéticos e fontes genes tolerância/resistência a estresses que necessitam ser adequadamente caracterizadas quanto ao potencial para o melhoramento. Os objetivos deste trabalho foram determinar genético individual em cruzamentos crioulas identificar materiais seleção intrapopulacional síntese compostos dois locais. Na safra 2000/01, avaliadas 31 per se, top-crosses intragrupo híbridos látices 8x8, com cinco quatro repetições nas...

The aim of this study was to evaluate 11 breeding lines and three bush snap bean cultivars related genetic divergence agronomic potential in Londrina Cambé, Paraná, Brazil. experimental design a randomized complete block with replications. Each plot represented by four rows 4.0m long 0.5m between rows. Eight characters were evaluated submitted individual joint analysis variance multivariate analysis. There statistical differences among genotypes for all the studied characteristics....

A karyotype analysis of 147 populations 25 Brazilian species Eleocharis (Cyperaceae) was carried out, including representatives the three subgenera that occur in country: Limnochloa, Scirpidium and Eleocharis. The analyses showed chromosomes without centromeres, but with terminal nucleolar constrictions (satellites) some chromosomes. chromosome numbers varied from 2n = 6 E. subarticulata maculosa to 60 laeviglumis, basic number x 5 confirmed. Species possess fewer larger chromosomes, while...

O objetivo deste trabalho foi identificar o tipo de ação gênica predominante para resistência a Exserohilum turcicum, Phaeosphaeria maydis, Physopella zeae e Puccinia polysora, determinar potencial genético linhagens endogâmicas milho (Zea mays) obtenção híbridos com elevado desempenho agronômico doenças foliares. Os 41 F1, provenientes cruzamentos dialélicos entre dez endogâmicas, as testemunhas P3069, P30F90, BG7060, Balu761 Dow2A120 foram avaliados em quatro locais, tendo-se utilizado...

Knowledge of the association between characters is very important in genetic breeding programs, but there limited information about correlations traits maize landraces current literature. The objectives this study were to estimate phenotypic, additive and environment among landraces, which cultivated family farm systems, order guide participatory on landraces. Between 294 400 half-sib progenies from six populations evaluated, subdivided triple 7X7 10X10 lattice design, respectively, with...

Extracellular proteases have been shown to be factors of virulence in fungal entomopathogenicity. We examined the production cuticle-degrading extracellular chymoelastase (Pr1) and trypsin (Pr2) isolates fungus Metarhizium flavoviride. Fungal growth was a mineral medium (MM) containing nitrate, MM supplemented with either cuticle from Rhammatocerus schistocercoides or non-cuticular substrate casein. The substrates used for influenced expression both analyzed proteases, highest protease...

Inter Simple Sequence Repeat (ISSR) markers were used to assess the genetic relationships among 79 landraces and two improved varieties of maize cultivated in Brazil. Nine primers comprising dinucleotides (GA) 9 , (AT) trinucleotides (GTG) 6 (TAG) tetranucleotides (GATA) 4 (GACA) (CCTA) (GGTA) for PCR amplifications. From a total 153 DNA fragments produced, 116 (75.8%) found be polymorphics. The dinucleotide motifs T C combined with other di-, tri- tetra-nucleotides produced greater number...

O objetivo deste estudo foi avaliar, por meio de topcrosses, o potencial heterótico 14 populações milho pipoca. No ano agrícola 1997/1998, foram obtidos os híbridos topcrosses resultantes dos cruzamentos das com testador, que se constituiu da mistura eqüitativa sementes todas as populações. 1999/2000, e avaliados em dois experimentos, delineamento blocos ao acaso, três repetições. Foram estimados parâmetros genéticos, realizadas análises variância Com base nos resultados capacidade geral...

O objetivo deste trabalho foi determinar o potencial de três testadores endogâmicos elites a fim avaliar e classificar 15 materiais genéticos para síntese híbridos. Quarenta cinco híbridos mais quatro testemunhas foram avaliados em ambientes, no ano agrícola 2000/2001, utilizando delineamento blocos ao acaso, com repetições. Foram os caracteres peso grãos corrigido, altura planta espiga. As estimativas capacidade geral específica combinação obtidas pelo modelo Griffing, adaptado por...

ABSTRACT The aims of this study were to determine the potential S4 super sweet corn inbred lines for hybrid synthesis, identify predominant types gene action and correlations among different traits, significant breeding programs. 81 hybrids obtained from a partial diallel 9x9 three checks evaluated. A complete randomized block design, with replicates, two sowing seasons was used. We could notice effects, general combining ability (GCA) GI GII groups specific (SCA) in relation evaluated...

Abstract: The objective of this work was to determine the possibility haploid induction in tropical supersweet corn (Zea mays L. var. saccharata) using a maternal inducer, as well identify alternative methods for selection. A single-cross hybrid field and 11 populations were crossed with inducer. haploids pre-selected R1-navajo marker differentiated into or false positives at V2-V3 stage, based on color first leaf sheath length stomata guard cells. obtained results are indicative inducing...

Os objetivos deste trabalho foram determinar as capacidades geral e específica de combinação entre variedades locais sintéticas milho identificar cruzamentos que reúnam características interesse agronômico, com vistas à síntese variedades. O dialelo parcial foi realizado 11 cruzadas cinco do Paraná. As combinações híbridas resultantes avaliadas juntamente genitoras híbridos comerciais, em blocos completos ao acaso quatro repetições, São João Triunfo Londrina, PR. Houve interação genótipo x...

Water deficit throughout the peanut plant development negatively affects physiological processes and reduces its yield. This study aimed to evaluate grain yield, yield components growth of cultivars breeding lines subjected water under field conditions. The experimental design was split-plot randomized blocks with three replications. treatments (with without irrigation) were considered plots genotypes (IAC Tatu ST, BR1, BRS Havana, Col 72 82) subplots. Irrigation discontinued between 35 75...

The development of software technologies to support the treatment Autistic Spectrum Disorder (ASD) has been intensifying, enabling emergence new forms education and treatment. Recent research in Human-Computer Interaction (HCI) area addresses interaction paths between users on autistic spectrum these technologies. In this context, paper presents a review scope that covered published Brazilian Symposium Human Factors Computing Systems (IHC), from 2013 2021, order identify analyze...

Identification of early haploids is necessary to increase the efficiency double haploid production. The objectives were determine effectiveness selection seedling and investigate inducers donor tropical supersweet corn interactions, based on stomatal guard cell length. Two inducers, three populations its six combinations F1's diploid haploid, classified expression R1-navajo gene by colors first leaf sheath in seedlings at V2 stage, used. From each treatments, external epidermal impressions...