Susceptibilidad de banano cv. Williams a sigatoka negra (Mycosphaerella fijiensis Morelet) sometido a diferentes dosis de rayos gamma.
World banana production is based on a very limited number of non-genetically enhanced clones that are selected in the wild and then domesticated. Considering the influence of black sigatoka, it is necessary to carry out research to obtain plants resistant to this disease, so the present investigatio...
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| Format: | bachelorThesis |
| Jezik: | spa |
| Izdano: |
2016
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| Teme: | |
| Online dostop: | http://repositorio.uteq.edu.ec/handle/43000/3260 |
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Označite | Izvleček: | World banana production is based on a very limited number of non-genetically enhanced clones that are selected in the wild and then domesticated. Considering the influence of black sigatoka, it is necessary to carry out research to obtain plants resistant to this disease, so the present investigation was carried out to determine the reaction of banana plants subjected to mutagenic treatments, against black sigatoka (Mycosphaerella fijiensis). The experiment was carried out at INIAP 's Tropical Pichilingue Experimental Station, located at Km 5 of Quevedo - El Empalme, Los Ríos Province, latitude 1 ° 06' and longitude 79 ° 25 '. Six treatments were evaluated: 20, 40, 60, 80, 100 and 120 Gy, which were compared with a control, for which a completely randomized design with seven treatments was used in 15 replicates. As main results it was observed that the application of 80 Gy allowed a greater development of the plant in height of the plant and engrose of the pseudostem, registering an average of 251.3 cm in height and 83.8 cm in circumference of the pseudotallo. The dose of 80 Gy allowed a greater leaf emission, determining an average of 9.1 leaves per plant. The dose of 80 Gy, registered a lower index of young leaves, reflecting an average of 5.7, which shows an increase of resistance to black sigatoka. The severity of sigatoka in plants submitted to different doses of Gy, showed that 80 Gy registered lower severity, with an index of 1.3; That is, a difference of 0.4 with respect to the control. The treatments did not present significant averages as to the degree of the fruit. The length of the banana fruits showed significant differences when comparing the irradiations of the treatments with the control, being greater in 100 Gy, with an average of 6.7 inches. Keywords: banana, mutagenesis, gamma rays, black sigatoka |
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