Data/hora: 13/06/2024 05:21:47

Provedor de dados: | 75
País: | Brazil
Título: | New sources of partial resistance to bacterial spot race T2 in processing tomatoes
Autores: | Berrueta,María C; Giménez,Gustavo; Galván,Guillermo A; Borges,Alejandra.
Data: | 2016-09-01
Ano: | 2016
Palavras-chave: | Xanthomonas vesicatoria; Solanum lycopersicum; Quantitative resistance; Durable resistance; Tomato breeding.
Resumo: | ABSTRACT Bacterial leaf spot of tomato is caused by four Xanthomonas species, among which Xanthomonas vesicatoria race T2 predominates in Uruguay. Difficulties in integrated disease management and the rapid spread of the pathogen led to investigations of genetic resistance. This study aimed to identify resistance sources to bacterial leaf spot race T2 in tomato for processing. Twelve genotypes were evaluated under field conditions in 2010 and 2011. Plants were spray-inoculated with a suspension of bacteria (108 cfu/mL) 15 days after transplantation. Incubation period, disease severity on leaves, and the percentage of fruits with symptoms at harvest were determined. The incubation period did not differ among the genotypes. The genotype 'Hawaii 7981' had the lowest leaf severity on the leaves, followed by 'Loica'. The lines (derived from the cultivar 'Loica') LB97, LB99, LB60, and LB76, and the cultivar 'Ohio 8245' showed intermediate levels of severity on leaves, whereas 'H9997', 'Cuyano', LB85, and 'NUN6011' presented higher severities. The differences in disease severity of the leaves were similar over the years, while incidence of symptoms in fruit was more variable. Next to 'Hawaii 7981', the cultivars 'Loica' and 'Ohio 8245' were identified as new sources of partial resistance to bacterial spot race T2.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000300326
Editor: | Associação Brasileira de Horticultura
Relação: | 10.1590/S0102-05362016003004
Formato: | text/html
Fonte: | Horticultura Brasileira  v.34 n.3 2016
Fonte: | info:eu-repo/semantics/openAccess