Abstract
The variables involved in ARR (Age - Related Resistance) to TYLCV in tomato plants were investigated in order to ascertain the impact of plant age and its link to disease development on gene expression of genetic resistance to TYLCV. Before being moved to the greenhouse, eleven virus-resistant and -susceptible kinds were nurtured in sterile conditions in Baghdad governorate’s protected nurseries. They were 15 days old when they went into the greenhouse to be planted on September 15, 2021. The virus-transmitting Bemisia tabaci bug was released into the plastic greenhouse following its activity, exposing the plants to direct infection. Afterwards, the plants were evaluated for their production, height, and molecular resistance by polymerase chain reaction (PCR). In addition, symptoms were tracked. All the cultivars evaluated showed a substantial decrease in yield when the plant was older when infected. Infection with TYLCV significantly reduced production for all cultivars. Our findings provide evidence that tomato plants develop resistance to TYLCV as they mature.
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