SciELO - Scientific Electronic Library Online

 
vol.42 número1Levantamento de raças do agente causador do míldio da alface no Estado de São Paulo em 2012 e 2013Caracterização de Fusarium solani f. sp. piperis, produção de fitotoxina e incidência da fusariose no norte de Minas Gerais índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Summa Phytopathologica

versão impressa ISSN 0100-5405

Resumo

ROSA, Luciano Rodrigo; SENA, Marcus Reis  e  SHIOMI, Humberto Franco. Double haploid technology to determine the inheritance of resistance to stalk rot (Fusarium verticilioides) in corn inbred lines. Summa phytopathol. [online]. 2016, vol.42, n.1, pp.59-66. ISSN 0100-5405.  https://doi.org/10.1590/0100-5405/2096.

Were used in the study four populations synthesized by crossing two contrasting inbred lines as resistance to F.verticilioides. To obtain haploid inbred lines of these populations were crossed with haploid inducer, the haploid lines were then duplicated and selfed, and the seeds harvested were the of origin of the inbred lines used in the study. Seventy days after sowing the inbred lines were inoculated with a suspension of spores of the pathogen in F.verticilioides concentration of 2 106 spores and 70 days after inoculation the ears were harvested and weighed and stalks were collected, weighed and measured in length and diameter and longitudinally sectioned for evaluation of symptoms, which were also the lengths of the lesions measured. They were estimated to phenotypic, environmental variances, full genotypic and between and within families, as well as heritability and additive variance and dominance. The variance due to dominant genetic effects was greatest magnitude, and the heritability in the narrow sense was 0.28. The observed frequency distribution may indicate epistatic effects involved in the genetic control of resistance to F.verticilioides. The biggest gains expected with the selection were achieved with the use of selection among families and mass selection.

Palavras-chave : Off season; Inheritability; Zea mays L..

        · resumo em Português     · texto em Português     · Português ( pdf )