In a previous work we showed a remarkable conservation of the general structure of the genome (chromo-some number and synteny) among different pathogenic species of Old World Leishmania, indicating the absence of major interchromosomal rearrangements during evolution. In the present study, we have compared the fine structure of chromo-some 5 among two of these divergent species (Leishmania majo...

The grass family (Poaceae) has been the subject of intense research over the past decade. Although other angiosperm families contain more species and more genera, the Poaceae exceed all other families in ecological dominance and economic importance. Research has focused on the evolutionary relationships among grasses as well as the structure of grass genomes. Here I examine the evolutionary dyn...

To explore the role of primary visual cortex in contour integration, we measured the contextual sensitivity of human contrast thresholds and of superficial layer complex cells in monkey V1. An observer's contrast detection was 40% improved by a second suprathreshold bar; the effect was decreased as the two bars were separated along their axis of orientation, were displaced from colinearity, and...

the present study was carried out to establish the relationships between carcass yield and some body measurements in lori goat breed. the first body weight (bw) and morphological traits of 186 heads goat were recorded. the animals were then slaughtered to calculate the carcass yield. results showed the colinearity among the traits. in order to eliminate colinearity problems, principal component...

investigation of the interrelationships between yield and its components will improve the efficiency of a breeding program with appropriate selection criteria. in this study, the relationship among yield components and their direct and indirect influences on the total yield of melon were investigated. the study was based on evaluation of 49 entries gener-ated from a 7×7 diallel involving irania...