title: DEVELOPMENT OF ELEMENTS OF TECHNOLOGY FOR PLANTING MATERIAL OF LETTUCE (&lt;i&gt;LACTUCA SATIVA L.&lt;/i&gt;) ON VIRUS-FREE BASIS USING METHODS OF BIOTECHNOLOGY
abstract: The article presents the results of research on the production in vitro of regenerated plants from the seeds of cultivars of lettuce ( Lactuca sativa L. ) Emerald, Bouquet, Chameleon (FSBSI Federal Scientific Vegetable Center), susceptible of aspermia tomato ( Tomato aspermy cucumovirus ) – AsTV. Seeds of strongly susceptible to AsTV varieties of salad Chameleon and Bouquet were subjected to thermotherapy at different temperatures (37°C, 38°C, 40°C) for a different time interval (1, 3, 5, 7, 10 
journal: VEGETABLE CROPS OF RUSSIA