Meiotic behaviour of Un, D and R genomes in the amphiploid Aegilops ventricosa -Secale cereale and the parental species

1985 ◽  
Vol 70 (6) ◽  
pp. 679-683 ◽  
Author(s):  
M. C. Cermeño ◽  
N. Cuñado ◽  
J. Orellana
Keyword(s):  
Secale Cereale ◽  
Parental Species ◽  
Meiotic Behaviour ◽  
Aegilops Ventricosa

Interstitial chiasmata and centromere orientation in heterozygotes for a translocation in rye

Genome ◽  
1987 ◽  
Vol 29 (4) ◽  
pp. 647-657 ◽  
Author(s):  
P. G. Goicoechea ◽  
A. Roca ◽  
T. Naranjo ◽  
R. Giraldez
Keyword(s):  
Key Words ◽  
Secale Cereale ◽  
Chiasma Frequency ◽  
Recombination Fraction ◽  
Translocation Breakpoint ◽  
Meiotic Behaviour ◽  
Significant Excess ◽  
Alternate Orientation ◽  
Chiasma Interference ◽  
Metaphase I

The meiotic behaviour of plants heterozygous for translocation T242W of rye (involving 2RL and 6RL) and an interstitial C-band in 2RL has been analyzed. Chain and frying pan quadrivalents predominate. The following results have further been obtained: (i) double chiasmata occur in the interstitial segment carrying the C-band; (ii) from the frequency of being bound at metaphase I and the frequency of recombinant chromosomes at anaphase I, estimates of chiasma frequencies (and chiasma interference) in interstitial segments have been derived; (iii) estimates of the recombination fraction between the interstitial C-band and the translocation breakpoint have been obtained from offspring analysis; (iv) there is a difference in the frequency of alternate orientation between configurations with and without interstitial chiasmata (adjacent-2 has not been observed and a small but significant excess of alternate vs. adjacent-1 coorientation appears). Without intersitial chiasmata, alternate orientation predominates. The possible reasons for these differences are discussed. Key words: Secale cereale, translocations, chiasma frequency, centromere orientation.

Synaptic abnormalities in spread nuclei of Secale. I. Inbred lines

Genome ◽  
1995 ◽  
Vol 38 (4) ◽  
pp. 764-771 ◽  
Author(s):  
M. Martínez ◽  
C. Cuadrado ◽  
C. Romero
Keyword(s):  
Complex Formation ◽  
Synaptonemal Complex ◽  
Secale Cereale ◽  
Inbred Lines ◽  
Meiotic Behaviour ◽  
Synaptonemal Complex Formation ◽  
Metaphase I

The meiotic behaviour at metaphase I of two inbred lines of Secale cereale showed a decrease in the frequency of bound arms and the presence of univalents. The study of synaptonemal complex formation revealed that these inbred lines had asynapsis and many nuclei did not complete the pairing process. Synaptic abnormalities such as fold-back loops, short pairing partner switches, interstitial nonhomologous pairing regions, and asynchrony between bivalents were associated and correlated with interlocking. It is suggested that the asynapsis is due to a failure in the interlocking repair. All these abnormalities could affect the formation and maintenance of chiasmata and so could explain the metaphase I behaviour of these inbred lines and the differences between them.Key words: inbred lines, Secale cereale, synaptonemal complex, spreading, synaptic abnormalities.

Nucleolar competition analysis in Aegilops ventricosa and its amphiploids with tetraploid wheats and diploid rye by the silver-staining procedure

1984 ◽  
Vol 26 (1) ◽  
pp. 34-39 ◽  
Author(s):  
J. Orellana ◽  
J. L. Santos ◽  
J. R. Lacadena ◽  
M. C. Cermeño
Keyword(s):  
Secale Cereale ◽  
Silver Staining ◽  
Triticum Turgidum ◽  
Tetraploid Wheat ◽  
Nucleolar Organizer ◽  
Triticum Dicoccoides ◽  
Staining Procedure ◽  
Nucleolar Organizer Regions ◽  
Aegilops Ventricosa ◽  
Tetraploid Wheats

The nucleolar organizer activity of Aegilops ventricosa and its amphiploids with tetraploid wheats (Triticum turgidum, Triticum dicoccum, and Triticum aethiopicum) and diploid rye (Secale cereale) was analyzed by the silver-staining procedure. Triticum turgidum and Triticum dicoccoides show four Ag-NORs (silver-stained nucleolar organizer regions), in agreement with previous data. Only two Ag-NORs are detected in Ae. ventricosa (genome constitution DDMM) indicating that natural amphiplasty occurs in this allotetraploid species. No amphiplasty was observed in the Ae. ventricosa – tetraploid wheat amphiploids since six Ag-NORs were visible in all of them. On the contrary, only two Ag-NORs were detected in the Ae. ventricosa – Secale cereale amphiploid, the rye NORs being suppressed by the presence of ventricosa chromosomes. The ventricosa NORs therefore are codominant with those of tetraploid wheat (chromosomes 1B and 6B) and dominant to chromosome 1R of rye. Eleven T. aestivum – Ae. ventricosa addition lines have been also analyzed. All of them showed four Ag-NORs. Clear-cut conclusions were not reached since the added ventricosa chromosomes were not identified.

Les lignées d'addition blé - Aegilops ventricosa. I. - Étude du comportement vis-à-vis du piétinverse des différentes lignées obtenues

Agronomie ◽  
1981 ◽  
Vol 1 (6) ◽  
pp. 503-511 ◽  
Author(s):  
Françoise DOSBA ◽  
Gérard DOUSSINAULT ◽  
Anne-Marie TANGUY ◽  
Henri JOUAULT
Keyword(s):  
Aegilops Ventricosa

Effet antioxydant et antihyperglycémiant du seigle (Secale cereale L.) et du sorgho (Sorghum bicolor L.) chez le rat Wistar rendu diabétique

2018 ◽  
Vol 16 (S1) ◽  
pp. S273-S283
Author(s):  
Z. Mami-Soualem ◽  
N. Brixi ◽  
C. Beghdad ◽  
M. Belarbi
Keyword(s):  
Sorghum Bicolor ◽  
Secale Cereale ◽  
Stress Oxydant ◽  
Habitudes Alimentaires ◽  
Diabète Sucré ◽  
Secale Cereale L ◽  
Vitamine C ◽  
Fibres Alimentaires ◽  
Peroxydation Lipidique ◽  
Sorghum Bicolor L

Le changement des habitudes alimentaires au cours de ces dernières années a abouti à l’apparition des maladies dites de civilisation, parmi elles le diabète sucré. Des approches diétothérapeutiques privilégient la consommation des produits céréaliers sous la forme la plus complète possible. Ce travail a pour but de tester l’efficacité des régimes expérimentaux préparés à base des grains complets des deux céréales, le sorgho (Sorghum bicolor L.) et le seigle (Secale cereale L.), sur la correction de l’hyperglycémie et des marqueurs du stress oxydant associés au diabète chez le rat mâle Wistar. Les résultats montrent que les rats diabétiques, soumis au régime seigle pendant quatre semaines, présentent une diminution significative de la glycémie qui atteint les 53,95 % à la fin de l’expérimentation, ce qui fait que leur taux en glycémie se rapproche de celui des normoglycémiques. Le sorgho blanc présente, d’une part, une diminution significative de la peroxydation lipidique intracellulaire et, d’autre part, une augmentation de l’activité de la glutathion peroxydase, la glutathion réductase ainsi que la vitamine C. Ces approches méthodologiques peuvent, en améliorant la connaissance de l’importance des céréales (fibres alimentaires solubles et des polyphénols) dans l’évolution du diabète, aboutir à des recommandations et à une éducation nutritionnelle du diabétique.

Genomic Variation in F1 Hybrid and Amphidiploid between Aegilops tauschii and Secale cereale

2013 ◽  
Vol 38 (6) ◽  
pp. 996-1002
Author(s):  
Suo-Ping LI ◽  
Da-Le ZHANG ◽  
Xiu-E WANG ◽  
Zeng-Jun QI ◽  
Da-Jun LIU ◽  
...  
Keyword(s):  
Secale Cereale ◽  
Aegilops Tauschii ◽  
Genomic Variation
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