Data/hora: 10/06/2024 09:18:37

Provedor de dados: | 74
País: | Brazil
Título: | An AFLP marker linked to the Pm-1 gene that confers resistance to Podosphaera xanthii race 1 in Cucumis melo
Autores: | Teixeira,Ana Paula Matoso; Barreto,Fatima Aparecida da Silva; Camargo,Luis Eduardo Aranha.
Data: | 2008-01-01
Ano: | 2008
Palavras-chave: | AFLP marker; Cucumis melo; Disease resistance; Linkage analysis; Powdery mildew.
Resumo: | Brazil produced 330,000 metric tons of melons in 2005, principally in the Northeast region where one of the most important melon pathogens is the powdery mildew fungus Podosphaera xanthii. The disease is controlled mainly by incorporating single dominant resistance genes into commercial hybrids. We report on linkage analysis of the Pm-1 resistance gene, introgressed from the AF125Pm-1 Cantalupensis Charentais-type breeding line into the yellow-fleshed melon (Group Inodorus) breeding line AF426-S by backcrossing to produce the resistant line AF426-R, and the amplified fragment length polymorphism (AFLP) marker M75/H35_155 reported to be polymorphic between AF426-S and AF426-R. Segregation analysis of M75/H35_155 using a backcross population of 143 plants derived from [AF426-R x AF426-S] x AF426-S and screened for resistance to P. xanthii race 1 produced a recombination frequency of 4.9%, indicating close linkage between M75/H35_155 and Pm-1. Using the same segregating population, the M75/H35_155 marker had previously been reported to be distantly linked to Prv¹, a gene conferring resistance to papaya ringspot virus-type W. Since M75/H35_155 is linked to Prv¹ at a distance of 40.9 cM it is possible that Pm-1 and Prv¹ are also linked.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000300023
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572008000300023
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.31 n.2 2008
Fonte: | info:eu-repo/semantics/openAccess