Resistance evaluation of corn genotypes to Meloidogyne graminicola
Keywords:
Zea mays, reaction, root-knot nematode.Abstract
The reaction of 18 corn genotypes (FepagroRS 21, FepagroRS 22, AM4001, AM4002, AM4003, AM4004, AM4005, BRS4103, BRS1002, BRSCaimbé, BRSMissões, BRSPlanalto, Fundacep 35, SCS 154 Fortuna, SCS 156 Colorado and SCS155 Catarina, PMS1641A08 and PMS1635A08) to Meloidogyne graminicola (VS1) was evaluated at green house conditions. Seedlings of the different genetic materials grown in pots with sterilized soil, were inocu- lated with 5.000 eggs + J2 of M. incognita/plant. Seedlings of ‘Santa Cruz’ tomato plants were used as controls. The experiment was carried out under a randomized design with six replications. Fifty-five days after the inoculation, the plant resistance was evaluated by counting the gall number egg number and nematode reproduction factor (RF = final population / initial population) determination. The host reaction of each cultivar was rated according to RF, as immune RF = 0,00, resistant RF < 1,00 and susceptible RF > 1,00. No galls were found at corn roots on none of the evaluated genotypes. The ‘AM 4001’, ‘BRS 1002’, ‘SCS154Fortuna’, and ‘BRS 4103’, genotypes were resistant to M. graminicola, and the other genetic materials behaved as immune to the nematode, whereas the control presented a great number of galls in the roots and permitted a high nematode reproduction factor (RF = 73,54).
Downloads
Downloads
Published
How to Cite
Issue
Section
License
The authors declare that the work has not been previously published, nor sent simultaneously for publication in another journal and that they agree with the submission, content and transfer of the publication rights of the article in question to the scientific journal Pesquisa Agropecuária Gaúcha - PAG. The authors assume full responsibility for the originality of the article, and may incur on them any charges arising from claims by third parties in relation to the authorship of the article. The full reproduction of the journal's articles in other free-to-use electronic media is permitted under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license.
