maize improvement for high temperature tolerance requires the reliable assessment of parental inbred lines and their combinations. fifteen maize inbred lines were evaluated during 2007 and 2008 in shushtar city (khuzestan province). the inbred lines were planted at two dates: 6 july, to coincide heat stress with pollination time; and 27 july, as normal planting to avoid high temperature during ...

in order to evaluate terminal drought tolerance in different canola cultivars based on drought tolerance indices, an experiment was conducted based on randomized complete block design (rcbd) with three replications at experimental field of seed and plant improvement institute (spii), karaj in 2008-09. results using stress tolerance index (sti), geometric mean productivity (gmp) and mean product...

This study was conducted to determine drought tolerance genotypes with superiority in different stressed environments. To screening quantitative indices of drought tolerance, genotypes of safflower (Carthamus tinctorius L.) were tested in a complete randomized block design with three replications under two different water regimes (irrigated and rainfed). Significant positive correlatio...

A new mathematical model is introduced for the tolerances of cylindrical surfaces. The model is compatible with the ISO/ANSI/ASME Standard for geometric tolerances. Central to the new model is a Tolerance-Map , a hypothetical volume of points which ®1 corresponds to all possible locations and variations of a segment of a line (the axis) which can arise from tolerances on size, location, and ori...

The goal of this research will be to provide sufficient conditions and tractable algorithms that guarantee the topological embedding of geometric approximations commonly used by modern geometric design systems. Particular focus is on the use of ambient isotopy as the measure of topological equivalence, which is stricter than the more traditional use of homeomorphism. Such topological guarantees...