HSF-240, one of the elite sugarcane varieties, was observed for its reaction with sugarcane smut over three consecutive years under natural conditions. The study includes plant crop, first year ratoon and second year ratoon crops. The... more
HSF-240, one of the elite sugarcane varieties, was observed for its reaction with sugarcane smut over three consecutive years under natural conditions. The study includes plant crop, first year ratoon and second year ratoon crops. The data revealed that in plant crop only 4.25 % stools were infected with smut and crop proved to be resistant during that year. In first year ratoon 18.39 % stools were infected with the disease and crop stood tolerant against the disease. However in second year ratoon the disease infected up to 38 % of stools rendering the crop severely susceptible to this disease. This suggests a swift replacement of HSF-240 with new and promising varieties, dejection of this variety in future as a plant crop as well as a ban on keeping ratoon of this variety.
The smut resistance trials of new varieties play an essential role in the Cuban sugar cane breeding program. At present, these studies are area, resource and time consuming, and their results depend to a great extent on genotype x... more
The smut resistance trials of new varieties play an essential role in the Cuban sugar cane breeding program. At present, these studies are area, resource and time consuming, and their results depend to a great extent on genotype x environment interaction. In this paper, the results of applying U. scitaminea Sydow culture filtrates to in vitro micropropagated plantlets are reported, as a possible resistance trial to smut under laboratory conditions. The fungus culture filtrate (FCF) provoked significant variations of fresh weight, increase in length and percent of chlorotic area, of the treated seedlings independently of field resistance from plantlet varieties. On the other hand, the decrease of in vitro tillering induced by FCF was directly related to field resistance in the studied genotypes. The measurement of this variable allowed to classify correctly six from the eight varieties studied, which encourages its future application as a criterion for smut resistance.
HSF-240, one of the elite sugarcane varieties, was observed for its reaction with sugarcane smut over three consecutive years under natural conditions. The study includes plant crop, first year ratoon and second year ratoon crops. The... more
HSF-240, one of the elite sugarcane varieties, was observed for its reaction with sugarcane smut over three consecutive years under natural conditions. The study includes plant crop, first year ratoon and second year ratoon crops. The data revealed that in plant crop only 4.25 % stools were infected with smut and crop proved to be resistant during that year. In first year ratoon 18.39 % stools were infected with the disease and crop stood tolerant against the disease. However in second year ratoon the disease infected up to 38 % of stools rendering the crop severely susceptible to this disease. This suggests a swift replacement of HSF-240 with new and promising varieties, dejection of this variety in future as a plant crop as well as a ban on keeping ratoon of this variety.
