The reaction of tomato plants carrying Mi-1 gene to different inoculation densities of Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949
The response of the Mi-1 gene to different densities of Meloidogyne incognita race 2 was investigated under controlled conditions. Susceptible and resistant tomato seedlings were inoculated with 25, 50, 100, 200, 400, 1000, 2000, 5000 and 10 000 second-stage juveniles of M. incognita. Plants were...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2018-06-01
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| Series: | Journal of Plant Protection Research |
| Subjects: | |
| Online Access: | https://doi.org/10.24425/119128 |
| Summary: | The response of the Mi-1 gene to different densities of Meloidogyne incognita race 2 was
investigated under controlled conditions. Susceptible and resistant tomato seedlings were
inoculated with 25, 50, 100, 200, 400, 1000, 2000, 5000 and 10 000 second-stage juveniles
of M. incognita. Plants were uprooted 8 weeks after inoculation and the numbers of
egg masses and galls on the roots, and second-stage juveniles in 100 g soil per pot were
counted. In susceptible plants, there was a correlation between the number of egg masses
on roots until 2000 J2 inoculum densities. In resistant plants, when inoculum densities
increased, the number of egg masses and galls also increased. The reproduction factor
ratio was >1 in the susceptible plant and <1 in the resistant plant. The data showed that
the 5000 J2 inoculum was a critical limit, and 10 000 J2s were above threshold for resistant
plants. The data indicate that densities of M. incognita can seriously affect the performance
of the Mi-1 gene. |
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| ISSN: | 1899-007X 1899-007X |