GENETIC CONTROL OF CHIASMA FREQUENCY AND DISTRIBUTION IN RYE SECALE CEREALE

1978 ◽  
Vol 20 (4) ◽  
pp. 471-474 ◽  
Author(s):  
T. Lelley
Keyword(s):  
Control System ◽  
Negative Correlation ◽  
Secale Cereale ◽  
Chiasma Frequency ◽  
Positional Distribution ◽  
Direct Consequence ◽  
Inbred Lines ◽  
Secale Cereale L ◽  
The Mean ◽  
Cell Variance

In inbred lines of rye (Secale cereale L.) a close negative correlation was found between mean chiasma number and their between-cell variance. No correlation was detected between mean chiasma number or chiasma variance and the positional distribution of chiasmata within the bivalents, that is, terminal or interstitial. It is concluded, therefore, that while the between-cell variance of chiasmata is a direct consequence of the mean chiasma frequency, the positional distribution of chiasmata within bivalents is probably subject to an independent control system.

THE GENETICS OF FERTILITY RESTORATION IN CYTOPLASMIC MALE-STERILE RYE

1979 ◽  
Vol 21 (3) ◽  
pp. 417-422 ◽  
Author(s):  
G. J. Scoles ◽  
L. E. Evans
Keyword(s):  
Secale Cereale ◽  
Fertility Restoration ◽  
Inbred Lines ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Cytoplasmic Male Sterile ◽  
Restorer Genes ◽  
Secale Cereale L ◽  
Partial Fertility

Three inbred lines of rye (Secale cereale L.) known to be capable of restoring fertility to a cytoplasmic male-sterile line were crossed with the sterile line. The proportions of male fertile, partially male fertile and male sterile plants in F2 and backcross progenies indicated that three dominant restorer genes were present in each line. These were designated Rf1, Rf2 and Rf3, their relative expressivity was Rf1>Rf2>Rf3. Expressivity was dependent upon environment. Partial fertility occurred when certain genotypes carried two of the three alleles as dominant, but was dependent upon genotype and environment.

Evidence of nonchiasmate bonds at metaphase I in inbred rye

1984 ◽  
Vol 26 (4) ◽  
pp. 409-414 ◽  
Author(s):  
M. C. Cermeño ◽  
J. Orellana ◽  
J. R. Lacadena
Keyword(s):  
Secale Cereale ◽  
Chiasma Frequency ◽  
Meiotic Pairing ◽  
Secale Cereale L ◽  
Chromosome 1R ◽  
Metaphase I

The loss of bound chromosome arms through early, middle, and late metaphase I has been analyzed in a plant of inbred rye (Secale cereale L.) heterozygous for a terminal heterochromatic C-band of the long arm of chromosome 1R. From the increase in the number of univalent pairs due to bound arm loss, and from the comparison between the frequencies of bound arms at metaphase I and recombinant chromosomes at anaphase I, it is concluded that some of the chromosome bonds appearing at metaphase I are actually nonchiasmate associations that can be considered as remnants of prophase pairing. Conclusions concerning recombination obtained solely from the analysis of chiasma frequency measured as bound arms may be invalid.Key words: inbred rye, C-heterochromatin, meiotic pairing, nonchiasmate bonds.

B-chromosomes in inbred lines of rye (Secale cereale L.)

Genetica ◽  
1994 ◽  
Vol 92 (3) ◽  
pp. 149-154 ◽  
Author(s):  
M. M. Jim�nez ◽  
E. Romera ◽  
M. J. Puertas ◽  
R. N. Jones
Keyword(s):  
Secale Cereale ◽  
Inbred Lines ◽  
B Chromosomes ◽  
Secale Cereale L

The effect of rye genotype on wheat–rye crossability and on the development of F1 seed

1983 ◽  
Vol 25 (6) ◽  
pp. 668-670 ◽  
Author(s):  
Graham J. Scoles
Keyword(s):  
Triticum Aestivum ◽  
Secale Cereale ◽  
Seed Set ◽  
Triticum Aestivum L ◽  
Inbred Lines ◽  
Hybrid Seed ◽  
Secale Cereale L

Five inbred lines of rye (Secale cereale L.) and an open-pollinated rye cultivar were used to pollinate wheat (Triticum aestivum L.) cultivars of differeing crossability. No hybrid seed was produced with the cultivar of low crossability, but with the highly crossable cultivar an average seed set of 65% was obtained. Significant differences in terms of seed set and weight of F1 seed were detected among the inbreds.

scholarly journals Genetical and anatomical analysis of brittlenses of stems in rye (Secale cereale L.)

2014 ◽  
Vol 50 (4) ◽  
pp. 567-574
Author(s):  
Helena Kubicka ◽  
Bogusław Kubicki
Keyword(s):  
Secale Cereale ◽  
Recessive Gene ◽  
Inbred Lines ◽  
Genetical Analysis ◽  
Anatomical Analysis ◽  
Whole Plant ◽  
Secale Cereale L

Brittlenes of thie stem was found to be one of the more frequently segregating traits in inbred rye lines. In dependenece on the outset cultivated variety this trait appears in the S<sub>2</sub> generation in 4.0-0.6 per cent of the inbred lines. Genetical analysis demonstrated that the trait of brttlenes is determined by one recessive gene denoted by the symbol b<sub>s</sub> (brittlee stem). The bs gene exerts a strong pleliotropic effect on the whole plant, beside brittleness of the stem it causes fragility of the roots, heads and leaves and depresses the general viability of the plants. Anatomilcal observations of thie stem and root sholwed that the b<sub>s</sub> gene causes disturbances in the norirmal lignifcation of the sclerenichyma cells both in shoots and roots, so that these cells are th1i-walled. The tickness of the sclerenchyma layers and the number and size of the vasclcuar in the brittle forms are significantly smaller than in the normal ones. It was found that these changes appear in the bittle forms at the phase of heading of the plants.

THE TRANSFER OF A CYTOPLASMIC MALE-STERILITY SYSTEM TO SPRING RYE

1979 ◽  
Vol 59 (1) ◽  
pp. 163-169 ◽  
Author(s):  
G. J. SCOLES ◽  
L. E. EVANS
Keyword(s):  
Cytoplasmic Male Sterility ◽  
Environmental Effects ◽  
Secale Cereale ◽  
Fertility Restoration ◽  
Inbred Lines ◽  
Winter Rye ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Secale Cereale L ◽  
Restoration Of Fertility

Six inbred lines of spring rye (Secale cereale L.) and an open-pollinated cultivar of spring rye were crossed with a cytoplasmic male-sterile line of winter rye. The open-pollinated cultivar and all except one inbred line exhibited segregation for fertility restoration. Through further inbreeding, sub-lines of certain breeds were obtained which were homozygous for maintenance of sterility or for restoration of fertility. Environmental effects on the expression of fertility restoration were detected.

scholarly journals Fungi infecting the roots and stem base of winter rye (Secale cereale L.) grown in the Lublin region (Poland)

2012 ◽  
Vol 65 (3) ◽  
pp. 85-92 ◽  
Author(s):  
Elżbieta Mielniczuk ◽  
Irena Kiecana ◽  
Małgorzata Cegiełko
Keyword(s):  
Secale Cereale ◽  
Disease Index ◽  
Fusarium Avenaceum ◽  
Winter Rye ◽  
Mean Values ◽  
Stem Base ◽  
Secale Cereale L ◽  
The Mean

This study was carried out in the period 2001-2005 in 10 winter rye plantations located in the Lublin region. The percentage of winter rye stems with necrosis symptoms on the lower internodes ranged from 32.5% to 71% in 2001, 38% to 68% in 2002, 21.5% to 56.5% in 2003, 35% to 70% in 2004, and 36% to 88% in 2005. The mean values of the disease index ranged from 7.5 to 46.75 and they differed significantly. The results of mycological analysis showed that the main pathogens infecting the roots and stem base of rye were the species <em>Fusarium avenaceum </em>(24% of all isolates) and <em>F. culmorum </em>(25% of all isolates).

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