Genetic localization of four genes for nematode (Heterodera schachtii Schm.) resistance in sugar beet (Beta vulgaris L.)

1996 ◽  
Vol 92 (8) ◽  
pp. 991-997 ◽  
Author(s):  
R. Heller ◽  
J. Schondelmaier ◽  
G. Steinrücken ◽  
C. Jung
Keyword(s):  
Sugar Beet ◽  
Beta Vulgaris ◽  
Heterodera Schachtii ◽  
Genetic Localization

Genetic localization of four genes for nematode (Heterodera schachtii Schm.) resistance in sugar beet (Beta vulgaris L.)

1996 ◽  
Vol 92 (8) ◽  
pp. 991-997 ◽  
Author(s):  
R. Heller ◽  
J. Schondelmaier ◽  
G. Steinr�cken ◽  
C. Jung
Keyword(s):  
Sugar Beet ◽  
Beta Vulgaris ◽  
Heterodera Schachtii ◽  
Genetic Localization

The monoxenic culture of beet eelworm (Heterodera schachtii Schm.) on excised roots of sugar beet (Beta vulgaris L.)

Parasitology ◽  
1964 ◽  
Vol 54 (2) ◽  
pp. 289-293 ◽  
Author(s):  
F. Moriarty
Keyword(s):  
Sugar Beet ◽  
Beta Vulgaris ◽  
Lateral Roots ◽  
Heterodera Schachtii ◽  
Chemical Stimulus ◽  
Adult Males ◽  
Wound Reaction ◽  
Maximum Root ◽  
Research And Education ◽  
Tissue Reactions

A method is described for obtaining sterile second-instar larvae of beet eelworm, Heterodera schachtii Schm., and culturing them to the adult stage on sterile excised roots of sugar beet, Beta vulgaris L. It was shown that beet eelworm is a primary pathogen, for sound uninjured radicles were invaded by larvae, and normal development of adult males and females followed. No females were fertilized, and no eggs were produced, which suggested that parthenogenesis cannot occur. Eelworm development stimulated the production of lateral roots. More adult females developed on radicles inoculated 24 hr. after excision than on radicles inoculated 72 hr. after excision, which may be related to the occurrence of maximum root extension during the first few days after excision. It is suggested that there are two parts in root tissue reactions: a thickening of cell walls as a wound reaction to mechanical injury, and formation of a syncytium in response to a chemical stimulus from the eelworm.I thank my wife for assistance with this work, which was financed by the Sugar Beet Research and Education Committee.

Sugar Beet Nematode (Heterodera Schachtii) Reared On Axenic Beta Vulgaris Root Explants

Nematologica ◽  
1969 ◽  
Vol 15 (1) ◽  
pp. 144-152a ◽  
Author(s):  
Ruth N. JOHNSON ◽  
D.R. Viglierchio
Keyword(s):  
Sugar Beet ◽  
Beta Vulgaris ◽  
Heterodera Schachtii ◽  
Root Explants

Association of a nematode resistance bearing addition chromosome with a recurring leaf intumescence somaclonal variation in sugar beet

Genome ◽  
1991 ◽  
Vol 34 (3) ◽  
pp. 477-485
Author(s):  
M. H. Yu ◽  
L. M. Pakish ◽  
J. W. Saunders
Keyword(s):  
Sugar Beet ◽  
Somaclonal Variation ◽  
Beta Vulgaris ◽  
Chromosome Doubling ◽  
Nematode Resistance ◽  
Heterodera Schachtii ◽  
Regenerated Plants ◽  
Alternative Expression ◽  
Monosomic Addition

Intumescent leaf variants of sugar beet (Beta vulgaris L.) were obtained through callus culture of a monosomic addition that carried resistance to Heterodera schachtii Schm. The frothy pockmarked appearance of the leaf surface was due to hyperplastic growth of the mesophyll and epidermal cells. The epidermis had many malformed stomata. Veins were underdeveloped, but protrusions beneath were pronounced. Intumescence occurred in 20.3% of the regenerated plants and it was heritable to F1 and later progeny. Leaf intumescence is a new phenotype for Beta. About 73.5% of regenerants contained the donor somatic chromosome number, the remainder were doubled or mixoploids, with no chromosome losses apparent. The 38-chromosome intumescent plant represents a dual somaclonal variation, chromosome doubling and leaf intumescence. Progeny of the 19- and 38-chromosome intumescent plants intercrossed or pollinated by diploids or tetraploids had 9, 18, 19, 27, 28, 29, 36, 37, 38, or 39 chromosomes. All intumescent plants were aneuploids with the monosome addition. There were linkages for leaf intumescence (Li), resistance to H. schachtii (Hs), and hypocotyl color (Rpro) on the addition chromosome. The efficacy of Hs remained intact through the in vitro culture and succeeding crosses. The Li-bearing plants manifested depressed growth and markedly reduced seed set. Leaf intumescence was thought to be the alternative expression of galling potential of Beta procumbens Chr. Sm. germ plasm.Key words: somaclonal variation, leaf intumescence, nematode resistance, monosomic addition, Beta vulgaris L.

scholarly journals Fungi associated with cysts of Globodera rostochiensis, G. pallida, and Heterodera schachtii; and egg masses and females of Meloidogyne hapla in Belgium

2005 ◽  
Vol 79 (2) ◽  
pp. 63-69 ◽  
Author(s):  
Q. Yu ◽  
J. Coosemans
Keyword(s):  
Solanum Tuberosum ◽  
Lycopersicon Esculentum ◽  
Sugar Beet ◽  
Fusarium Oxysporum ◽  
Beta Vulgaris ◽  
Globodera Rostochiensis ◽  
Heterodera Schachtii ◽  
Meloidogyne Hapla ◽  
Egg Masses ◽  
Predominant Species

Cysts of Heterodera schachtii from sugar-beet (Beta vulgaris) fields and cysts of Globodera rostochiensis and G. pallida from potato (Solanum tuberosum) fields in northern Belgium, as well as egg masses and females of Meloidogyne hapla from a tomato (Lycopersicon esculentum) field in the Flemish-Brabant province, Belgium, were collected and examined for the presence of fungi. Of the total of 374 cysts of H. schachtii, 57.7% were colonized by one or more of 18 different species of fungi, all of which were from the genra Acremonium, Chaetomium, Cylindrocarpon, Fusarium, Gliocladium, Humicola, Mariannaea, Nematophthora, Periconia, Phoma, and Verticillium, and 45.3% of the 726 cysts of Globodera spp. were colonized by one or more of 18 different species, from the same gene. Of the 160 egg masses of M. hapla, 32% were colonized by one or more of 18 species of the genra Arthrobotrys, Cylindrocarpon, Fusarium, Monacrosporium, Paecilomyces, Phoma, Plectosphaerella, and Verticillium, while 31% of the 160 females were colonized by 12 species, from the same gene except Paecilomyces and Plectosphaerella. Fusarium oxysporum was by far the predominant species in both the cyst and root-knot nematodes. A black yeast-like fungus was found in cysts.

Sugar Beet Nematode (Heterodera Schachtii) Reared On Axenic Beta Vulgaris Root Explants

Nematologica ◽  
1969 ◽  
Vol 15 (1) ◽  
pp. 129-143 ◽  
Author(s):  
Ruth N. JOHNSON ◽  
D.R. Viglierchio
Keyword(s):  
Sugar Beet ◽  
Beta Vulgaris ◽  
Heterodera Schachtii ◽  
Root Explants
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