@article{article_467189, title={Response of tomato plants carrying Mi-1 gene to Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949 under high soil temperatures}, journal={Turkish Journal of Entomology}, volume={42}, pages={313–322}, year={2018}, DOI={10.16970/entoted.467189}, author={Özalp, Tevfik and Devran, Zübeyir}, keywords={Duration, Mi-1 gene, resistance, root-knot nematodes, soil temperature, tomato}, abstract={<p>             <span style="line-height:12.84px;">The Mi-1 gene conferring resistance to root-knot nematodes in tomato breaks down at soil temperatures above 28ºC. To understand this phenomenon, the reactions of susceptible and resistant tomatoes toMeloidogyne incognita(Kofoid & White, 1919) Chitwood, 1949 were separately investigated under four soil temperatures, 25, 28, 30 and 32ºC, and at six time periods, 6, 12, 24, 48, 120 and 168 h. The study was conducted between 2015 and 2016 in growth chambers. In the first experiment, the plants were separately exposed to soil temperatures for the same six periods before nematode inoculation and then transferred to a growth chamber with 25ºC. Reproduction factor (Rf) for nematode on resistant plants was <1, while the Rf for susceptible plants was >1. Results indicated that the resistance provided by Mi-1persisted under all soil temperatures. In the second experiment, the seedlings were simultaneously inoculated with M. incognita when soil temperatures reached 25, 28, 30 and 32ºC, and held in soil temperatures for the same six periods, then transferred to a growth chamber with 25ºC soil temperature. Rf in heterozygous resistant plants exposed to 32ºC soil temperature for ≥48 h was >1. This study indicated that the resistance in plants held at 32ºC soil temperature for ≥48 h lost its effect. </span> <span style="font-family:’-webkit-standard’;font-size:medium;"> </span> <br /> </p>}, number={4}, publisher={Türkiye Entomoloji Derneği}