scholarly journals ASSOCIATION OF ISOZYMES WITH A RECIPROCAL TRANSLOCATION IN CULTIVATED RYE (SECALE CEREALE L.)

Genetics ◽  
1985 ◽  
Vol 109 (1) ◽  
pp. 177-193
Author(s):  
Ana M Figueiras ◽  
Maria T Gonzalez-Jaen ◽  
Julio Salinas ◽  
Cesar Benito
Keyword(s):  
Secale Cereale ◽  
Reciprocal Translocation ◽  
Chromosome Arrangement ◽  
Electrophoretic Patterns ◽  
Meiotic Configuration ◽  
Chromosome Arm ◽  
Secale Cereale L ◽  
Metaphase I

ABSTRACT In rye (Secale cereale L. cv. "Ailés") the progeny of a cross between a structural heterozygote for a reciprocal translocation (involving the 1R chromosome) and a homozygote for the standard chromosome arrangement were analyzed for the electrophoretic patterns of eight different leaf isozymes and also for their meiotic configuration at metaphase I.—The Got-3 and Mdh-2b loci are linked to each other and also to the reciprocal translocation. The Mdh-2b locus is located in the interstitial segment of the 3Rq chromosome arm, with an estimated distance of 8 cM to the breakpoint. Therefore, the reciprocal translocation involves the 1R and 3R chromosomes.—Also, the Mdh-1 and 6-Pgd-2 loci are linked (16 ± 3 cM) and have been located on the 2Rq arm. Finally, the Per-3 and Per-4 loci are located on the 2Rp chromosome arm at an estimated distance of 26 ± 4 cM.

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.

A comparative study of the changes of peroxidase patterns during wheat, rye, and triticale kernel maturation

1983 ◽  
Vol 61 (3) ◽  
pp. 825-829 ◽  
Author(s):  
M. J. Asíns ◽  
C. Benito ◽  
M. Pérez de la Vega
Keyword(s):  
Comparative Study ◽  
Secale Cereale ◽  
Triticum Turgidum ◽  
Tetraploid Wheat ◽  
Characteristic Pattern ◽  
Hexaploid Triticale ◽  
Electrophoretic Patterns ◽  
Secale Cereale L

A comparative study on the electrophoretic patterns of embryo plus scutellum, endosperm, and internal and external coats of rye (Secale cereale L. and Secale vavilovii Grossh.), tetraploid wheat (Triticum turgidum L. durum), and hexaploid Triticale during kernel maturation has been carried out. Each kernel part of each species showed a characteristic pattern, and slow pattern changes from the beginning of the study (5 days after pollination) until kernels reached maturity (dry kernels) were observed. The triticale peroxidase patterns were very similar to tetraploid wheat patterns, and only few rye isozymes were clearly observed, probably due to overlapping with wheat isozymes. The possible influence of rye genome on the expression of wheat isozymes in triticale is also discussed.

Allocation of a powdery mildew resistance locus to the chromosome arm 6RL of Secale cereale L. cv. ‘Jingzhouheimai’

Euphytica ◽  
2010 ◽  
Vol 176 (2) ◽  
pp. 157-166 ◽  
Author(s):  
Dan Wang ◽  
Lifang Zhuang ◽  
Ling Sun ◽  
Yigao Feng ◽  
Ziyou Pei ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Secale Cereale ◽  
Powdery Mildew Resistance ◽  
Resistance Locus ◽  
Mildew Resistance ◽  
Chromosome Arm ◽  
Secale Cereale L

Comparison between synaptonemal complexes at pachytene and chromosome association at metaphase I in heterozygotes for a "nonreciprocal" translocation of rye

Genome ◽  
1989 ◽  
Vol 32 (6) ◽  
pp. 983-991 ◽  
Author(s):  
T. Naranjo ◽  
A. Roca ◽  
P. G. Goicoechea ◽  
J. H. de Jong ◽  
W. D. Smilde
Keyword(s):  
Complex Formation ◽  
Synaptonemal Complex ◽  
Secale Cereale ◽  
Chiasma Formation ◽  
Chromosome Association ◽  
Simultaneous Occurrence ◽  
Negative Interference ◽  
Secale Cereale L ◽  
Synaptonemal Complex Formation ◽  
Metaphase I

A comparative analysis of synaptonemal complex formation at pachytene and chromosome association at metaphase I was carried out in heterozygotes for translocation T242W (2R/6R) of rye (Secale cereale L.). Synaptonemal complex formation supported earlier light microscopic observations that one exchanged segment of this translocation was very small and restricted to the telomere or had been lost. Negative interference between the interstitial segments with respect to chiasma formation was detected at metaphase I. This interference was apparently the result of the simultaneous occurrence of either asynapsis or nonhomologous pairing around the translocation point at pachytene. Negative interference detected across the centromere of 6R was attributed to nonhomologous pairing. The presence of an intercalary C-band in the interstitial segment 2RLi or in the 1RS arm had no apparent influence on synaptonemal complex formation. Unmatched ends of synaptonemal complex 1R and of the multivalent were in most cases associated with heterozygosity for the telomeric C-heterochromatin.Key words: Secale cereale, translocation, synapsis, interference, C-banding.

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