Agronomy (Dec 2022)

Allelic Complementation in Hybrid Superiority of Popcorn to Multiple Foliar Diseases

  • Divino Rosa dos Santos Junior,
  • Rodrigo Moreira Ribeiro,
  • Antônio Teixeira do Amaral Junior,
  • Marcelo Vivas,
  • Julio Cesar Gadice Saluce,
  • Jhean Torres Leite,
  • Rosimeire Barboza Bispo,
  • Valter Jário de Lima,
  • Danielle Leal Lamego,
  • Kevelin Barbosa Xavier,
  • Kátia Fabiane Medeiros Schmitt,
  • Samuel Henrique Kamphorst,
  • Flávia Nicácio Viana,
  • Alexandre Pio Viana,
  • Messias Gongaza Pereira

DOI
https://doi.org/10.3390/agronomy12123103
Journal volume & issue
Vol. 12, no. 12
p. 3103

Abstract

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Popcorn cultivation has been growing in and has positively affected the Brazilian economy. However, these crops are grown with genotypes susceptible to diseases, generating high losses. Thus, studies aimed at obtaining resistant genotypes are particularly interesting, as popcorn is susceptible to several pathogens. The most efficient, environmentally correct, and economical method of disease control is using resistant cultivars. The present study aimed to evaluate the performance of inbred lines of popcorn and their respective testcross hybrids in terms of diseases caused by fungi. For this purpose, 15 S7 inbred lines were crossed with five testers, four with a narrow genetic basis (inbred lines L270, L651, P1, and L70) and one with a broad genetic basis (open pollination variety PARA 172). The arrangement of treatments in incomplete blocks (lattice 10 × 10) with three replications was used. The testcross was efficient in the discrimination per se of the progenies and the testers. The inbred lines L685, L691, L696, and L684 and the PARA 172 tester showed potential resistance to P. polysora, B. maydis, and E. turcicum. The GT biplot method proved reliable in identifying efficient, responsive, and resistant inbred lines and revealing the hybrid 56 as the ideal genotype.

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