Evaluation of Lycopersicon esculentum Mill genotypes for resistance to tomato yellow leaf curl virus (TYLCV)
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Abstract
constitutes one of the biggest restrictive factors for tomato
crop in Cuba. Obtaining resistant genotypes is one of the
most attractive solutions for production, as a result of the
threat of this virus to crop yield. In the National Institute of
Agricultural Sciences (INCA), a breeding program began using
commercial varieties with the resistant gene (Ty-1) to TYLCV
starting from the resistant variety Vyta. Crosses between the
resistant variety Vyta and the susceptible varieties Amalia,
Mariela, Mara, Inifat-28 and Inca-33 were carried out, and their
hybrid offspring, F1, was subjected to a virus diagnosis
(molecular and not molecular); also the agronomic evaluation
to them, to the parental genotypes, to the hybrid HA-3019 and
the variety Campbell-28 was performed, these ones used as
resistant and susceptible control respectively. Results of the
diagnosis proved the resistant character of Vyta to the disease,
the good behavior of hybrids derived from this and HA-3019
hybrid, the susceptibility of commercial varieties and Campbell-28.
Results from the diagnosis along with the agronomic
evaluations allowed to select Mara x Vyta and Mariela x Vyta
as promising hybrids to continue the plant breeding program
to TYLCV that is being developed at INCA.
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