Cucurbit Genetics Cooperative Report 4:53-55 (article 28) 1981
Response of Some Cucurbita and Cucumis
Accessions to Three Meloidogyne Species
A. Dalmasso, R. Dumas de Vaulx and
M. Pitrat
Station de Recherches sur les Nematodes,
INRA, 06602 Antibes Cedex, France (first author); Station d'Amelioration des Plantes Maraicheres,
INRA, B.P. 94, 84140 Montfavet-Avignon, France (second and third authors)
We have developed an interspecific hybridization program
to introduce into squash (Cucurbita pepo) and muskmelon
(Cucumis melo) disease resistance found in wild
Cucurbita and Cucumis species. We have
realized the interspecific hybridization between C.
pepo and C. martinezii (3) [= C. okeechobeensis
according to Robinson and Puchalski (6)] and C. pepo
x C. ecuadorensis (4). The wild species involved
in this program were inoculated with different populations
of three Meloidogyne species: Meloidogyne incognita,
M. arenaria, and M. javanica. The most
important of these species in France on Cucurbitaceae is
M. arenaria, but the others can also cause damage (1, 2).
All the inoculated Cucurbita species were susceptible
to M. arenaria and M. javanica (Table
1). However, we noticed differences among the cultivars
of C. pepo with the different populations of
M. incognita; 'Diamant' seemed more tolerant than 'Black
Beauty' with each of the three M. incognita populations.
The most important conclusion is that the accessions of
wild Cucurbita species inoculated are as susceptible
to M. arenaria and M javanica as C.
pepo and they are more susceptible to M. incognita.
We have to be careful when introducing powdery mildew and
virus resistance to not bring greater susceptibility to
root-knot nematodes into C. pepo.
The two accessions of Cucumis metuliferus were
resistant to two populations of M. arenaria but
susceptible to a third population. An accession of C.
metuliferus from Fassuliotis seemed a little less susceptible
to M. javanica and M. incognita than the
one from the Vavilov Institute. Cucumis ficifolius,
PI 193967, was more resistant to the three populations of
M. arenaria than C. metuliferus but was
susceptible to two of the three populations of M. incognita.
These two Cucumis species are very interesting
for their high level of tolerance to root-knot nematodes
and justify attempts to realize interspecific hybridization
with cultivated Cucumis (5). Since M. arenaria
is the most common species of Meloidogyne in France,
C. ficifolius would be more interesting than C.
metuliferus.
Table 1. Egg production index of Cucurbita and
Cucumis species inoculated with different source populations
of three Meloidogyne species (sources given).
|
|
|
|
Species |
|
|
|
|
|
|
|
Cucurbita |
C. pepo cv Black Beauty |
|
|
|
|
|
|
|
C. pepo cv Diamant |
|
|
|
|
|
|
|
C. martinezii |
|
|
|
|
|
|
|
C. lundelliana |
|
|
|
|
|
|
|
C. ecuadorensis |
|
|
|
|
|
|
|
Cucumis |
C. metuliferus (1) |
|
|
|
|
|
|
|
C. metuliferus (2) |
|
|
|
|
|
|
|
C. ficifolius PI 193967 |
|
|
|
|
|
|
|
0=non infection; 1=very light infection; 2=reduced infection;
3=maximum infection, high multiplication rate.
(1) Received from Vavilov Institute.
(2) Received from G. Fassuliotis.
Literature Cited
- Cardin, M. C. 1979. Influence of temperature on the
relationships of Meloidogyne hapla with cucumber
roots. Rev. Nematol. 2:169-175.
- Dalmasso, A. 1980. Les nematodes Meloidogyne
et al tomatoe de conserve. Pepinieristes Hortic. Maraichers
205:29-34.
- Dumas de Vaulx, R. and M. Pitrat. 1979. Interspecific
cross between Cucurbita pepo and C. martinezii.
Cucurbit Genet. Coop. Rpt. 2:35.
- Dumas de Vaulx, R. and M. Pitrat. 1980. Realization
of the interspecific hybridization (F1 and BC1) between
Cucurbita pepo and C. ecuadorensis.
Cucurbit Genet. Coop. Rpt. 3:42.
- Norton, J. D. and D. M. Granberry. 1980. Characteristics
of progeny from an interspecific cross of Cucumis
melo with Cucumis metuliferus. J. Amer.
Soc. Hort. Sci. 105:174-180.
- Robinson, R. W. And J. P. Puchalski. 1980. Synonymy
of Cucurbita martinezii and C. okeechobeensis.
Cucurbit Genet. Coop. Rpt. 3:45-46.
