Results 131 to 140 of about 481 (159)

Variabilidade de isolados de Microcyclus ulei no Sudeste da Bahia [PDF]

open access: yesTropical Plant Pathology, 2003
O fungo Microcyclus ulei, causador do mal-das-folhas da seringueira (Hevea brasiliensis), é o maior responsável pelo insucesso da heveicultura nas áreas tradicionais de cultivo no Brasil. Com o objetivo de conhecer melhor a diversidade desse patógeno foram estudados 50 isolados, obtidos nos anos 1997 e 1998, de uma área de 5.000 ha de seringueira da ...
Dominique Garcia   +2 more
exaly   +4 more sources

A rubber tree’s durable resistance to Microcyclus ulei is conferred by a qualitative gene and a major quantitative resistance factor [PDF]

open access: possibleTree Genetics and Genomes, 2011
The components of genetic resistance from the Hevea brasiliensis cultivar MDF 180 against South American Leaf Blight (SALB) caused by Microcyclus ulei were investigated by QTL mapping. MDF 180 has already been described as a cultivar with a high level of partial and long-lasting resistance.
Vincent Le Guen   +2 more
exaly   +6 more sources

Assessing susceptibility of Hevea clones to Microcyclus ulei

Annals of Applied Biology, 1976
SUMMARYLeaf disks of 7‐day‐old Hevea leaves floating on water produced lesions of varying sizes following inoculation with conidia of Microcyclus ulei, the cause of South American leaf blight (SALB) of Hevea. The resistance ratings of 188 Hevea clones classified according to lesion size on leaf disks and to leaf area infected in the field were ...
exaly   +2 more sources

A newly identified locus controls complete resistance to Microcyclus ulei in the Fx2784 rubber clone

Tree Genetics and Genomes, 2013
Using cultivars which are genetically resistant to South American leaf blight (SALB) caused by the fungus Microcyclus ulei is the only way to plant rubber trees in disease-affected areas. Numerous field observations led to the hypothesis that the resistance of the cultivar Fx2784 to SALB is likely to be monogenic.
Vincent Le Guen   +2 more
exaly   +3 more sources

Identification of QTLs involved in the resistance to South American leaf blight (Microcyclus ulei) in the rubber tree [PDF]

open access: possibleTheoretical and Applied Genetics, 2000
South American leaf blight (SALB) is a disease of the rubber tree caused by the fungus Microcyclus ulei. Quantitative trait loci (QTLs) for resistance were mapped using 195 F1 progeny individuals derived from the cross between a susceptible cultivated clone, PB260, and a resistant clone, RO38, derived from interspecific hybridization.
L Grivet, M Seguin
exaly   +2 more sources

Microcyclus ulei . [Descriptions of Fungi and Bacteria].

Descriptions of Fungi and Bacteria, 1970
Abstract A description is provided for Microcyclus ulei . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Restricted to Hevea spp. Recorded on: H. brasiliensis (Para rubber tree),
null UK, CAB International, P. Holliday
openaire   +1 more source

Bypassing of a polygenicMicrocyclus uleiresistance in rubber tree, analyzed by QTL detection

New Phytologist, 2006
SummaryGenetic resistance components of theHevea brasiliensis × H. benthamianaRO 38 cultivar toMicrocyclus uleidisease were investigated by inoculating isolates which succeeded in partially or completely infecting genotypes of a mapping population.Progeny of a cross between RO 38 and a susceptible cultivar was inoculated under controlled conditions ...
Le Guen, Vincent   +5 more
openaire   +3 more sources

Molecular mapping of genes conferring field resistance to South American Leaf Blight (Microcyclus ulei) in rubber tree [PDF]

open access: possibleTheoretical and Applied Genetics, 2003
The South American Leaf Blight (SALB), caused by the fungus Microcyclus ulei, is the major rubber tree disease in all Central and South America. A population of 192 progeny individuals derived from a cross between a resistant clone and a susceptible cultivated clone was planted in a field trial in French Guiana in order to evaluate the resistance ...
Le Guen, Vincent   +5 more
openaire   +2 more sources

Isolados de Dicyma pulvinata em estromas de Microcyclus ulei em seringueira

open access: yesPesquisa Agropecuaria Brasileira, 2006
Dicyma pulvinata is an efficient biocontrol agent of Microcyclus ulei, causal agent of South American leaf blight. The objective of this work was to obtain strongly antagonistic isolates.
Sueli CORRÊA MARQUES De Mello
exaly   +2 more sources

South American leaf blight of Hevea brasiliensis: spore dispersal of Microcyclus ulei

Annals of Applied Biology, 1976
SUMMARYTrapping of ascospores and conidia of Microcyclus ulei among young trees of Hevea brasiliensis in Trinidad from May 1973 to May 1975 snowed that ascospores occurred throughout the year whilst conidia were present only during the wet season. Peak ascospore concentrations occurred in August and November during the wet season, the latter peak being
exaly   +2 more sources

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