Traits of tomato male gametophyte as a criterion for selection of breeding valuable forms at early stages of ontogenesis

In vitro assessment of pollen qualitative traits affecting reproductive and other functions of tomato plants was carried out, including under the influence of a high-temperature stress factor in multimarker lines and F1 hybrids obtained on their basis. The F1 hybrids and lines are characterized by morphological traits of pollen. It was revealed that the morphological heterogeneity of pollen grains in the F1 hybrid Rozamak is associated with the dominant inheritance of the ls gene from the maternal form. It has been shown that the processes of pollen germination and pollen tube growth under in vitro conditions in both freshly collected and heat-treated F1 hybrids occur synchronously and in a shorter period (1-2 hours) than in their parental lines.