RESUMEN
The Ethiopian fruit fly, Dacus ciliatus, is an important pest of cucurbits, which recently invaded the Middle East. The genetics and cytogenetics of D. ciliatus have been scarcely studied. Such information is, however, an essential basis for understanding the biology of insect pests, as well as for the design of modern control strategies. We report here the mitotic karyotype and detailed photographic maps of the salivary gland polytene chromosomes of this species. The mitotic metaphase complement consists of six pairs of chromosomes, including one pair of heteromorphic sex (XX/XY) chromosomes. The heterogametic sex is ascribed to the male. The analysis of the salivary gland polytene complement shows a total number of five long chromosomes (10 polytene arms), which correspond to the five autosomes of the mitotic nuclei, and a heterochromatic mass corresponding to the sex chromosomes. Banding patterns, as well as the most characteristic features and prominent landmarks of each polytene chromosome are presented and discussed. Chromosomal homologies between D. ciliatus and Bactrocera oleae are proposed by comparing chromosome banding patterns and by in situ hybridization of the hsp70 gene.
Asunto(s)
Análisis Citogenético , Tephritidae/genética , Animales , Bandeo Cromosómico , Mapeo Cromosómico , Cromosomas de Insectos , Femenino , Proteínas del Choque Térmico HSP72/genética , Masculino , Mitosis/genética , Cromosomas Politénicos/genética , Glándulas Salivales/metabolismoRESUMEN
In this study we examined the relationship between level of family burden and extent of psychological distress among family members of 52 psychiatric patients. Our sample consisted of 31 chronic and 21 subchronic patients with a diagnosis of schizophrenia. The paper focused on the influence of psychosocial factors, such as the sense of personal control and coping strategies upon the extent and the perception of burden. The carers of chronic patients more frequently used a passive way of coping with everyday problems. Passivity and variability on behalf of the carers were significantly correlated with areas of objective burden. Consistent with a stress-process model, we found that the factor of mastery correlated significantly with family burden and distress scores. The findings of the study are discussed in the context of community family interventions.