2,372 research outputs found
Caracterização de linhagens de milho quanto aos teores de ácido fítico, Zn, Fe e às razões molares ácido fítico: Fe e ácido fítico: Zn.
Surface crossover exponent for branched polymers in two dimensions
Transfer-matrix methods on finite-width strips with free boundary conditions
are applied to lattice site animals, which provide a model for randomly
branched polymers in a good solvent. By assigning a distinct fugacity to sites
along the strip edges, critical properties at the special (adsorption) and
ordinary transitions are assessed. The crossover exponent at the adsorption
point is estimated as , consistent with recent
predictions that exactly for all space dimensionalities.Comment: 10 pages, LaTeX with Institute of Physics macros, to appear in
Journal of Physics
Genomic islands of divergence in the Yellow Tang and the Brushtail Tang Surgeonfishes.
The current ease of obtaining thousands of molecular markers challenges the notion that full phylogenetic concordance, as proposed by phylogenetic species concepts, is a requirement for defining species delimitations. Indeed, the presence of genomic islands of divergence, which may be the cause, or in some cases the consequence, of speciation, precludes concordance. Here, we explore this issue using thousands of RAD markers on two sister species of surgeonfishes (Teleostei: Acanthuridae), Zebrasoma flavescens and Z. scopas, and several populations within each species. Species are readily distinguished based on their colors (solid yellow and solid brown, respectively), yet populations and species are neither distinguishable using mitochondrial markers (cytochrome c oxidase 1), nor using 5193 SNPs (pairwise Φst = 0.034). In contrast, when using outlier loci, some of them presumably under selection, species delimitations, and strong population structure follow recognized taxonomic positions (pairwise Φst = 0.326). Species and population delimitation differences based on neutral and selected markers are likely due to local adaptation, thus being consistent with the idea that these genomic islands of divergence arose as a consequence of isolation. These findings, which are not unique, raise the question of a potentially important pathway of divergence based on local adaptation that is only evident when looking at thousands of loci
Estoque de carbono e densidade de solo sob cultivo com diferentes culturas agrícolas, em Sete Lagoas, MG.
Produtividade de grãos e forragem de milho consorciado com braquiária decumbens em diferentes distâncias em relação a renques de eucalipto.
Selection strains of Bacillus thuringiensis toxic to Helicoverpa armigera and potential for plant growth promotion.
Sistema reprodutivo e suas implicações no melhoramento genético de uma população de melancia.
Este trabalho objetivou estimar a taxa de fecundação cruzada natural em uma população segregante para expressão sexual e discutir as implicações do sistema reprodutivo sobre o melhoramento genético e a estimação de parâmetros quantitativos em melancia
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