Alien chromosome fragments conditioning resistance to beet cyst nematode in diploid descendants from monosomic additions of Beta procumbens to B. vulgaris

1986 ◽  
Vol 28 (3) ◽  
pp. 439-443 ◽  
Author(s):  
J. H. de Jong ◽  
G. J. Speckmann ◽  
Th. S. M. de Bock ◽  
W. Lange ◽  
A. van Voorst
Keyword(s):  
Beta Vulgaris ◽  
Extra Chromosome ◽  
Organizer Region ◽  
Cyst Nematode ◽  
Alien Chromosome ◽  
Satellite Chromosome ◽  
Chromosome Fragment ◽  
Beta Procumbens ◽  
Beet Cyst Nematode ◽  
Monosomic Addition

A monosomic addition plant of Beta vulgaris, containing an extra chromosome of B. procumbens with a gene for resistance to the beet cyst nematode, gave rise to a diploid descendant with an additional chromosome fragment. This fragment was found to bear the gene for resistance. A study of its morphology and behaviour made it likely that it represents the short arm of the alien chromosome and may have originated by centric fission of the single addition chromosome at anaphase I or II. The fragment showed incomplete generative transmission. In part of the somatic cells the fragment was missing and occasionally more than one fragment per cell was observed. The transmission of resistance in the telosome addition material was about 10%, which is 2.5 times lower than that of the monosomic addition. The pattern of transmission can be explained by an incomplete centromere, otherwise disturbed centric activity, or chromatid cohesiveness. Comparison with other monosomic addition plants showed that the resistance gene is located on the short arm of the satellite chromosome of B. procumbens and thus is linked to the nucleoar organizer region. The long arm of this chromosome possesses genes influencing annuality and leaf shape.Key words: Beta vulgaris, Beta procumbens, beet cyst nematode, monosomic addition, centric chromosome fragment.

Disomic and ditelosomic alien chromosome additions in beet (Beta vulgaris), carrying an extra chromosome of B. procumbens or telosome of B. patellaris

Genome ◽  
1993 ◽  
Vol 36 (2) ◽  
pp. 261-267 ◽  
Author(s):  
W. Lange ◽  
Th. S. M. De Bock ◽  
G. J. Speckmann ◽  
J. H. De Jong
Keyword(s):  
Beta Vulgaris ◽  
Germ Line ◽  
Extra Chromosome ◽  
Chiasma Formation ◽  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
Alien Chromosome ◽  
Chromosome Transmission ◽  
Female Germ Line ◽  
Mother Cells

Alien chromosome transmission through the female germ line as well as meiosis in pollen mother cells were studied in disomic and ditelosomic alien chromosome additions of beet. Beta vulgaris, carrying an extra pair of chromosomes or telosomes of B. procumbens or B. patellaris, respectively. The alien chromosomes carried genes for resistance to the beet cyst nematode, Heterodera schachtii, and screening for this resistance was used to select plants with or without the alien chromosomes. A great variation for alien chromosome transmission was recorded and plants carrying two extra alien chromosomes were recovered in the backcross progenies of the disomic or ditelosomic additions. However, in these progenies the average frequencies of plants without alien chromosomes (86%) did not clearly differ from that in similar progenies of the original monosomic or monotelosomic chromosome additions, indicating that doubling the number of the alien chromosome did not enlarge their transmission to the next generation. The alien chromosomes fully paired at pachytene and desynapsed again before diakinesis, indicating decreased chiasma formation. At second metaphase nearly 60% of the cells had one extra chromosome, and the remaining cells carried two or no extra chromosomes in about equal proportions. The tetrads looked fully normal. The expected relation between the average number of alien chromosomes in the germ cells and in the plants of the progenies did not show up, indicating a strong selection favouring the female gametes without alien chromosomes.Key words: disomic and ditelosomic alien chromosome additions, Beta vulgaris, Beta procumbens, Beta patellaris, chromosome transmission, meiosis.

Isolation of DNA markers linked to a beet cyst nematode resistance locus in Beta patellaris and Beta procumbens

1992 ◽  
Vol 235 (2-3) ◽  
pp. 432-440 ◽  
Author(s):  
E. M. J. Salentijn ◽  
N. N. Sandal ◽  
W. Lange ◽  
Th. S. M. De Bock ◽  
F. A. Krens ◽  
...  
Keyword(s):  
Dna Markers ◽  
Nematode Resistance ◽  
Cyst Nematode ◽  
Resistance Locus ◽  
Beta Procumbens ◽  
Beet Cyst Nematode ◽  
Beta Patellaris

Sugar beets homozygous for resistance to beet cyst nematode (Heterodera schachtii Schm.), developed from monosomic additions of Beta procumbens to B. vulgaris

Euphytica ◽  
1988 ◽  
Vol 38 (2) ◽  
pp. 121-131 ◽  
Author(s):  
W. Heijbroek ◽  
A. J. Roelands ◽  
J. H. de Jong ◽  
C. van Hulst ◽  
A. H. L. Schoone ◽  
...  
Keyword(s):  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
Sugar Beets ◽  
Beta Procumbens ◽  
Beet Cyst Nematode ◽  
Monosomic Additions

Reproduction of the beet cyst nematode Heterodera schachtii Schm. on transformed root cultures of Beta vulgaris L.

1987 ◽  
Vol 6 (5) ◽  
pp. 379-381 ◽  
Author(s):  
H. Paul ◽  
C. Zijlstra ◽  
J. E. Leeuwangh ◽  
F. A. Krens ◽  
H. J. Huizing
Keyword(s):  
Beta Vulgaris ◽  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
Root Cultures ◽  
Beet Cyst Nematode ◽  
Transformed Root Cultures

Computer mapping of records of beet cyst nematode (Heterodera schachtii), 1928?77

1982 ◽  
Vol 31 (2) ◽  
pp. 157-162 ◽  
Author(s):  
JENNIE A. WHITEWAY ◽  
T. J.W. ALPHEY ◽  
P. L. MATHIAS ◽  
J.F. SOUTHEY
Keyword(s):  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
Computer Mapping ◽  
Beet Cyst Nematode
Sign in / Sign up

Export Citation Format

Share Document