OCCURRENCE OF ENDORNAVIRUSES IN WILD, LANDRACES, AND CULTIVARS OF PHASEOLUS VULGARIS FROM THE MESOAMERICAN AND ANDEANREGIONS

摘要

Based on the type of relationship with the host, plant viruses can be grouped as acute or persistent (3). Acute viruses are well studied and cause disease in plants. In contrast, persistent viruses do not appear to affect the phenotype of the plant host. Persistent viruses include members of the family Endornaviridae which has members with genomes that range from 9.8 to 17.6 kbp; infect plants, fungi, and oomycetes; are transmitted only via gametes; and do not cause apparent symptoms (1). Phaseolus vulgaris endornavirus 1 (PvEV-1) and Phaseolus vulgaris endornavirus 2 (PvEV-2) have been reported to be prevalent in common bean (Phaseolus vulgaris) cultivars of Mesoamerican origin. In contrast, they have been found rarely in cultivars of Andean origin (2, 5). The goal of this investigation was to determine the occurrence of these viruses in a variety of P. vulgaris genotypes that originated from the two centers of domestication of common bean: Mesoamerica and the Andes.