2024-03-29T06:25:14Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/252952018-08-03T07:23:48Zcom_10261_74com_10261_6col_10261_327
DIGITAL.CSIC
author
Jiménez-Díaz, Rafael M.
author
Mercado-Blanco, Jesús
author
Olivares-García, Concepción
author
Collado-Romero, Melania
author
Bejarano-Alcázar, José
author
Rodríguez-Jurado, Dolores
author
Jiménez-Jaime, Ana
author
García-Jiménez, José
author
Armengol, J.
2010-06-15T12:15:27Z
2010-06-15T12:15:27Z
2006-03
Phytopathology 96:288-298 (2006)
1439-0434
http://hdl.handle.net/10261/25295
10.1094/PHYTO-96-0288
Severe Verticillium dahliae attacks have occurred in artichoke crops in
the Comunidad Valenciana region of eastern-central Spain since the late
1990s. Knowledge of genetic and virulence diversity in the pathogen
population is a key factor for the management of the disease through disease
risk assessment as well as development and use of resistant cultivars.
V. dahliae isolates from artichoke (109 isolates) and cotton (three isolates)
in that region were characterized by vegetative compatibility grouping
(VCG), and specific polymerase chain reaction assays using three sets
of primer pairs that differentiate the cotton-defoliating (D) and -nondefoliating
(ND) V. dahliae pathotypes. In all, 35 and 39 V. dahliae isolates
representative of the identified VCGs and geographic origins were tested
for virulence to artichoke cvs. Nun 6374 and Nun 9444, and cotton cv.
Acala SJ-2, respectively. Four VCGs were identified among 107 artichoke
isolates, and 2 isolates were heterokaryon self-incompatible: VCG1A
(one isolate), VCG2A (31 isolates), VCG2B (72 isolates), and VCG4B
(three isolates). The three cotton isolates were VCG1A. Isolates in
VCG2B were distributed across the region and were the most prevalent
isolates in the northern part. Conversely, 83.9% of isolates in VCG2A
were recovered from the southern part of the region. Two subgroups of
isolates were identified in VCG2B based on heterokaryon compatibility
with either international or local tester isolates, which further showed
diversity in the amplification of 334- and 824-bp DNA fragments which
are markers of the D and ND pathotypes, respectively. Virulence of isolates
to artichoke and cotton correlated with VCG but the pattern of correlation
varied with the host. VCG1A isolates from artichoke and cotton
induced defoliation in cotton but not in artichoke. Collectively, isolates of
VCG2B and VCG4B were the most virulent and isolates of VCG1A or
HSI were the least virulent to artichoke; but isolates of VCG1A were
more virulent to cotton than those of any other VCG. Also, molecular
subgrouping in VCG2B determined by amplification of the 334- and
824-bp markers correlated with virulence of isolates to the two hosts
tested.
eng
closedAccess
Gossypium hirsutum
Molecular marker
Genetic and virulence diversity in Verticillium dahliae populations infecting artichoke in Eastern-Central Spain
artículo
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