SOURCES AND INHERITANCE OF LEAFMINER RESISTANCE IN YELLOW MELON ACCESSIONS

Authors

  • Roberta Rocha Ferreira Department of Agronomic and Forestry Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN https://orcid.org/0000-0002-0234-0127
  • Adriano Ferreira Martins Department of Agronomic and Forestry Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN https://orcid.org/0000-0002-0481-4066
  • Francisco Leandro Costa Loureiro Department of Agronomic and Forestry Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN https://orcid.org/0000-0002-1497-5875
  • Elton Lucio de Araujo Department of Agronomic and Forestry Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN https://orcid.org/0000-0001-8274-502X
  • Glauber Henrique de Sousa Nunes Department of Agronomic and Forestry Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN https://orcid.org/0000-0002-7189-2283

DOI:

https://doi.org/10.1590/1983-21252022v35n401rc

Keywords:

Cucumis melo L.. Liriomyza spp.. Genetic resistance. Dominant gene.

Abstract

The use of resistant cultivars is an efficient and recommended method for the management of leafminers, which are the main phytosanitary problem in melons. The objectives of this study were to identify the sources of resistance to the leafminer in yellow melon accessions and to determine the resistance inheritance in acession AM-RT. Two field experiments were conducted in the municipalities of Baraúna, RN and Icapuí, CE, Brazil, to identify the sources of resistance. The design adopted was completely randomized blocks with 22 treatments and four replications. In this evaluation, the number of mines per leaf was quantified. The heterogeneity of the studied materials allowed for the identification of the accessions AM-RT and AM-TM as sources of resistance, considering that they revealed zero mines in the two evaluation environments. The accession AM-RT was selected and used to obtain the S1 population (by self-fertilization), S1:2 population derived from S1, and crossing between AM-RT and ‘Goldex’, which were evaluated in a third laboratory trial to determine the genetic control of resistance in that material. By the segregation pattern of the populations S1, S1:2, and the crossing (AM-RT and ‘Goldex’) and the estimation of the chi-squared (χ2) values, which were 1.33, 3.14, and 0.36, respectively, it was determined that the inheritance of resistance was controlled by only one gene with complete dominance. Therefore, in this study, two sources of resistance to the leafminer were identified, and resistance was conditioned by a gene with complete dominance in the accession ‘AM-RT’.

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References

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Published

20-09-2022

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Section

Agronomy