SciELO - Scientific Electronic Library Online

 
vol.27 número3Influência de doses de nitrogênio na severidade de doenças e na produtividade da melanciaPotencialidade de um actinomiceto de rizosfera de tomateiro como agente de biocontrole de doenças índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Horticultura Brasileira

versão impressa ISSN 0102-0536

Resumo

CARVALHO FILHO, José Luiz S de et al. F4 families of crispleaf lettuce with tolerance to early bolting and homozygous for resistance to Meloidogyne incognita race 1. Hortic. Bras. [online]. 2009, vol.27, n.3, pp.335-339. ISSN 0102-0536.  http://dx.doi.org/10.1590/S0102-05362009000300013.

The objective of this study was to evaluate yield, commercial characteristics, tolerance to early bolting and resistance to the root-knot nematode Meloidogyne incognita race 1 in 25 F4 families of crispleaf lettuce, obtained out of crosses between cultivars Grand Rapids, Regina 71, and Verônica. In the first experiment, we evaluate leaf blade and borders characteristics, aboveground fresh weight, and number of days from sowing to the anthesis of first flower (tolerance to early bolting). In the second experiment, we evaluated the resistance to Meloidogyne incognita race 1 via gall index and number of galls and egg masses per root system. Five families had scores for leaf blade and borders similar to cultivars Verônica and Grand Rapids. Furthermore, 84% of the families were as tolerant to early bolting as cultivar Veronica, while 92% of the families were homozygous for resistance to Meloidogyne incognita race 1.

Palavras-chave : Lactuca sativa L; breeding; root-knot nematode.

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

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons