Identification of Resistance Sources of BARI Released Tomato Varieties/Lines against Leaf Curl Viruses

Abstract

An experiment was conducted at the Regional Agricultural Research Station, Jamalpur, Bangladesh during rabi season of 2022-23 to identify noble sources of resistance in BARI released Tomato varieties/lines against leaf curl viruses. The evaluation of forty-six Tomato genotypes was performed against Tomato Leaf Curl Viruses (ToLCV) under natural conditions where the viruses were transmitted by white fly. However, ToLCV-infected plants ranged from 6.25 to 39.58% in the study. Thirty-four varieties/lines resulted in >10-30% ToLCV infection (MR), 5 varieties/lines exhibited >30 to 50% ToLCV infection (MS) and 7 varieties/lines exhibited 1 to <10% ToLCV infection (R). Plants that were likely ToLCV resistant ranged in percentage from 60.42 to 93.75. Comparatively, 5 varieties/lines indicated 60–70% ToLCV apparent resistance, while 12 varieties/lines showed 70–80% ToLCV apparent resistance. More than 80% of the ToLCV apparent resistance was generated by 29 varieties/lines. BARI Tomato-16 variety produced the maximum fruit yield (84.10 t/a), followed by the BARI Hybrid Tomato-5 (81.28 t/ha), the BARI Tomato-19 (81.23 t/ha), the BARI Tomato-14 (80.86 t/ha), the BARI Tomato-9 (81.20 t/ha) which were statistically at par. BD-10950 lines (10.33 t/ha) produced the least amount of fruit. Different varieties and lines with minimal ToLCV infection have higher fruit yields, indicating that they are most likely resistant to the infection.