Resistance to Meloidogyne enterolobii in sweet potatoes

Autores/as

  • Ranoel José de Sousa Gonçalves Academic Unit of Technology, Federal University of Campina Grande. Sumé. Paraíba. Brazil.
  • Regis de Castro Carvalho Federal University of Lavras. CEP. 37200-000. Lavras, Minas Gerais. Brazil.
  • Wilson Roberto Maluf Federal University of Lavras. CEP. 37200-000. Lavras, Minas Gerais. Brazil.
  • Thiago Matos Andrade Federal University of Sergipe. São Cristóvão. Sergipe. Brazil.
  • Álvaro Carlos Gonçalves Neto Departament of Agricultural Science. Federal University of Paraíba. Bananeiras. Paraíba. Brazil.
  • Maria Zilderlânia Alves Academic Unit of Technology, Federal University of Campina Grande. Sumé. Paraíba. Brazil.

Palabras clave:

Ipomoea batatas, mejoramiento genético vegetal, índice de reproducción, nematodo del nudo

Resumen

The present work was designed to select for sweet potatoes clones (Ipomoea batatas) resistant to Meloidogyne enterolobii (Syn. M. mayaguensis) as well as evaluate the efficiency of the selection methods used by estimating their genetic (VCg) and environmental (VCe) variation coefficients as well as broad sense heritability. A total of 142 sweet potato genotypes were tested, including four commercial varieties (Brazlândia Rosada, Brazlândia Roxa, Brazlândia Branca, and Palmas) as well as the Santa Clara tomato cultivar (utilized as a susceptibility standard). The experimental design was completely randomized blocks, in two repetitions of six plants each. Resistance levels were classified according to the numbers of eggs per gram of roots, the reproduction factor (RF), and the reproduction index (RI) relative to the Santa Clara tomato cultivar. The b= VCg/VCe ratio and broad sense heritability were high in terms of the numbers of eggs per gram of roots, as well as in terms of the reproduction factor and reproduction index, demonstrating the efficiency of the methodology used in the selection of resistant genotypes. Thirty-one sweet potato genotypes resistant to M. enterolobii were identified as having significant potential for continuing the breeding program.

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Publicado

09-12-2019

Cómo citar

de Sousa Gonçalves, R. J. ., de Castro Carvalho, R. ., Maluf, W. R. ., Matos Andrade, T. ., Gonçalves Neto, Álvaro C. ., & Zilderlânia Alves, M. . (2019). Resistance to Meloidogyne enterolobii in sweet potatoes. Revista De La Facultad De Ciencias Agrarias UNCuyo, 51(2), 318–332. Recuperado a partir de https://revistas.uncu.edu.ar/ojs3/index.php/RFCA/article/view/2704

Número

Sección

Protección vegetal

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