Banco ativo de germoplasma de seringueira.

O presente trabalho mostra um pequeno relato da origem e forma de cruzamento dos materiais existentes na coleção do Centro Nacional de Pesquisa de Seringueira (CNPSe)

Adaptability and stability in rubber tree progenies under different environmental conditions.

The aim of this work was to select progenies with high adaptability and stability from the dry rubber yield (PBS), of genotypes from a three-year-old rubber tree population, installed in three different locations (Selvíria, MS, Votuporanga, SP and Colina, SP), by the MHPRVG (Harmonic mean of the relative performance of the genetic value) method predicted by BLUP. The progenies were installed in a randomized block design with 30 treatments (progenies), three replications and 10 plants per plot, with spacing of 3.00 x 3.00 m (Selvíria, MS) and 1.50 x 1.50 m (Colina, SP and Votuporanga, SP). The PBS presented considerable genetic coefficient variability, ranging from 23.03 to 27.82% and average heritability ranging from 0.47 to 0.99, indicating the high value of the progeny tests in rubber tree breeding programs. The MHPRVG method provided a genetic gain ranging from 11 to 38% in 10 progenies to the PBS and allowed the selection of progenies with high predicted yield potential

Eficiência de métodos para a superação da dormência de sementes de videira.

O presente trabalho teve como objetivo avaliar dois métodos para a quebra de dormência das sementes de videira. Sementes do cruzamento ‘A1118’ x‘Superior Seedless’ realizada pela Embrapa Semi-Árido em 2004, foram submetidas a do is tratamentos: três concentrações de ácido giberélico (0, 2000 e 4000 mg.L-1) e 4 períodos de tempo em geladeira comum sob temperatura de 5ºC (0, 30, 60 e 90 dias)

Fenologia da videira no semi-árido brasileiro.

O objetivo deste trabalho foi estudar o comportamento fenológico da videira, no Vale do São Francisco

Experimental and theoretical evidences for the ice regime in planar artificial spin ices

In this work, we explore a kind of geometrical effect in the thermodynamics of artificial spin ices (ASI). In general, such artificial materials are athermal. Here, We demonstrate that geometrically driven dynamics in ASI can open up the panorama of exploring distinct ground states and thermally magnetic monopole excitations. It is shown that a particular ASI lattice will provide a richer thermodynamics with nanomagnet spins experiencing less restriction to flip precisely in a kind of rhombic lattice. This can be observed by analysis of only three types of rectangular artificial spin ices (RASI). Denoting the horizontal and vertical lattice spacings by a and b, respectively, then, a RASI material can be described by its aspect ratio $\gamma$=a/b. The rhombic lattice emerges when $\gamma$=$\sqrt{3}$. So, by comparing the impact of thermal effects on the spin flips in these three appropriate different RASI arrays, it is possible to find a system very close to the ice regime