Combining ability of seven resistance characteristics of Lycopersicon spp. to tomato leafminer

• Autor(es):

  Suinaga, Fábio A. (Embrapa Algodão);

  Casali, Vicente W.D. (Universidade Federal de Viçosa. Departamento de Fitotecnia);

  Picanço, Marcelo C. (Universidade Federal de Viçosa. Departamento de Biologia Animal);

  Silva, Derly J.H. da (Universidade Federal de Viçosa. Departamento de Fitotecnia).

• Fonte:

  Horticultura Brasileira; volume 22, número 2, páginas 242-248. Junho 2004.

• Assuntos:

  Tuta absoluta;

  tomato;

  plant breeding;

  biometry.

• Resumo:

  Using the partial diallel methodology, interspecific hybrids of tomato were obtained, in order to study the general and specific combining abilities (GCA and SCA, respectively) between two groups of Lycopersicon spp. Seven characteristics of tomato resistance to Tuta absoluta were evaluated. Significant differences regarding the majority of the evaluated traits were observed. Based on GCA, the genotypes Ângela, Santa Clara, LA 716 and LA 1777 are the most indicated to be used in a breeding program to improve the tomato resistance to T. absoluta. The best hybrids, considering SCA and heterosis, were Ângela x PI 126445, Ângela x PI 127826, IPA-5 x LA 1777 and Santa Clara x LA 716.

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