The Sec -1 locus on the short arm of chromosome 1R of rye ( Secale cereale )

Chromosoma ◽  
1996 ◽  
Vol 105 (5) ◽  
pp. 269-275 ◽  
Author(s):  
B. C. Clarke ◽  
Y. Mukai ◽  
R. Appels
Keyword(s):  
Secale Cereale ◽  
Chromosome 1R

scholarly journals Mapping of resistance genes to brown rust in 1R chromosome of rye (Secale cereale L.)

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 588-589
Author(s):  
O.A. Baranova ◽  
A.P. Dmitriev ◽  
A.V. Voylocov ◽  
O.V. Solodukhina
Keyword(s):  
Resistance Genes ◽  
Secale Cereale ◽  
Segregation Analysis ◽  
Recombination Frequency ◽  
Brown Rust ◽  
Isozyme Locus ◽  
Secale Cereale L ◽  
Chromosome 1R

Five resistance genes to single-pustule isolates Nos. 12, 81,108 and 7 of brown rust were mapped on 1R chromosome of rye using two different F<sub>2</sub> populations. Under segregation analysis it was found linkage between genes controlling resistance to single-pustule isolates No. 12, 81, 108 and 25 and isozyme locus Prx7, which to be localized on chromosome 1R. The recombination frequencies are 0.32, 0.28, 0.29 and 0.32 correspondingly. Also we were found linkage between Prx7 and gene, controlling resistance to single-pustule isolate No. 7. Recombination frequency in this case was equal 0.10 and 0.29 in dependence on analyzing hybrids.

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.

scholarly journals A first survey of the rye (Secale cereale) genome composition through BAC end sequencing of the short arm of chromosome 1R

2008 ◽  
Vol 8 (1) ◽  
pp. 95 ◽  
Author(s):  
Jan Bartoš ◽  
Etienne Paux ◽  
Robert Kofler ◽  
Miroslava Havránková ◽  
David Kopecký ◽  
...  
Keyword(s):  
Secale Cereale ◽  
Genome Composition ◽  
Bac End Sequencing ◽  
Chromosome 1R

scholarly journals A novel resource for genomics of Triticeae: BAC library specific for the short arm of rye (Secale cereale L.) chromosome 1R (1RS)

BMC Genomics ◽  
2008 ◽  
Vol 9 (1) ◽  
pp. 237 ◽  
Author(s):  
Hana Šimková ◽  
Jan Šafář ◽  
Pavla Suchánková ◽  
Pavlína Kovářová ◽  
Jan Bartoš ◽  
...  
Keyword(s):  
Secale Cereale ◽  
Bac Library ◽  
Secale Cereale L ◽  
Chromosome 1R

scholarly journals PAIRING COMPETITION BETWEEN IDENTICAL AND HOMOLOGOUS CHROMOSOMES IN AUTOTETRAPLOID RYE. I. SUBMETACENTRIC CHROMOSOMES

Genetics ◽  
1985 ◽  
Vol 111 (4) ◽  
pp. 933-944
Author(s):  
J Orellana ◽  
J L Santos
Keyword(s):  
Genetic Control ◽  
Secale Cereale ◽  
Inbred Lines ◽  
Meiotic Pairing ◽  
Homologous Chromosomes ◽  
Partner Exchange ◽  
Pairing Behavior ◽  
Chromosome 1R ◽  
Heterochromatin Content

ABSTRACT Meiotic pairing preferences between identical and homologous but not identical chromosomes were analyzed in ten induced tetraploid/diploid chimaeral rye plants (Secale cereale) heterozygous for telomeric heerochromatin C-bands in both arms of chromosome 1R. These plants were the progeny of two crosses between only one plant of cv. Petkus, used as male, and two plants of the inbred lines E and R, respectively. Different pairing preferences for chromosome 1R were found: (1) between plants, (2) between chromosome arms within the same plant and (3) between bivalents and multivalents within the same plant. The possible influence in the preferences of several factors such as differences in C-heterochromatin content in the chromosomes analyzed, specific genetic control and independence in pairing behavior between both arms and partner exchange is discussed.

RFLP-based genetic map of rye (Secale cereale L.) chromosome 1R

1991 ◽  
Vol 82 (2) ◽  
pp. 174-178 ◽  
Author(s):  
M. L. Wang ◽  
M. D. Atkinson ◽  
C. N. Chinoy ◽  
K. M. Devos ◽  
R. L. Harcourt ◽  
...  
Keyword(s):  
Genetic Map ◽  
Secale Cereale ◽  
Secale Cereale L ◽  
Chromosome 1R

The relation between pairing preference and chiasma frequency in tetrasomics of rye

Genome ◽  
2004 ◽  
Vol 47 (1) ◽  
pp. 122-133 ◽  
Author(s):  
E Benavente ◽  
J Sybenga
Keyword(s):  
Secale Cereale ◽  
Chiasma Frequency ◽  
Active Sites ◽  
Chiasma Formation ◽  
Long Distance ◽  
Association Pattern ◽  
Chromosome 1R ◽  
Favorable Conditions ◽  
Pairing Initiation ◽  
Effective Pairing

The association pattern of marked tetrasomes of Secale chromosome 1R at meiotic first metaphase was analyzed. Two of the four chromosomes were identical with terminal C-bands at both arms; the other two were also identical but lacked C-bands and were homologous or homeologous with the first two. Four different types of heterozygotes for 1R were studied: (i) autotetraploid hybrids between genetic variants within Secale cereale subsp. cereale, (ii) tetraploid hybrids between subspecies of Secale cereale, (iii) tetraploid hybrids between species of Secale, and (iv) autotetrasomes of S. cereale in a wheat background. Earlier observations that heterozygous associations (banded with unbanded) had consistently higher chiasma frequencies than homozygous associations were extended and confirmed. To analyze this phenomenon more closely, the possible relations between this correlation and several other meiotic phenomena were studied. For this analysis, three genetically different autotetraploid hybrids within S. cereale were selected that differed with respect to the relation between pairing type and chiasma frequency. Special attention was given to different patterns of interference and other meiotic phenomena in the two chromosome arms of chromosome 1R. No relations between such phenomena and the relation between pairing type and chiasma frequency could be established. A hypothesis is formulated assuming that long-distance homologue attraction is concentrated in a limited number of sites and that in different genotypes, different patterns of active sites are present. Moderately weak attraction sites can pair with strong homologous sites under favorable genetic conditions, but two weak sites cannot. Then, heterozygotes have more effective pairing initiation and consequently chiasma formation than homozygotes. Under less favorable conditions, only strong sites are effective, and then, homozygotes pair better, but the chiasma frequency is lower. A model of the forces involved in homologue attraction is presented.Key words: autopolyploids, preferential pairing, chiasma frequency, homologue attraction, Secale.

Structure of the rye midget chromosome analyzed by FISH and C-banding

Genome ◽  
1997 ◽  
Vol 40 (5) ◽  
pp. 782-784 ◽  
Author(s):  
S. A. Jackson ◽  
J. Jiang ◽  
B. Friebe ◽  
B. S. Gill
Keyword(s):  
In Situ Hybridization ◽  
Fluorescence In Situ Hybridization ◽  
Secale Cereale ◽  
Dna Probe ◽  
Telocentric Chromosome ◽  
C Banding ◽  
Chromosome 1R

The diminutive "midget" chromosome derived from rye (Secale cereale) was analyzed by C-banding and fluorescence in situ hybridization (FISH) using DNA probe pSau3A9 that is located in the centromeres of cereal chromosomes. FISH signals were detected at one end and overlapped one of the two telomeres of the midget, indicating that the midget is a telocentric chromosome. The FISH and C-banding results show that the centromere of the midget chromosome is smaller than those of normal wheat and rye chromosomes. These results indicate that one of the breakpoints occurred in the middle of the centromere of rye chromosome 1R during generation of the midget.Key words: Secale cereale, midget chromosome, centromere, telomere

Synaptonemal complex formation and metaphase I configuration patterns in a translocation heterozygote of rye (Secale cereale)

Genome ◽  
1989 ◽  
Vol 32 (1) ◽  
pp. 72-81 ◽  
Author(s):  
J. H. de Jong ◽  
J. van Eden ◽  
J. Sybenga
Keyword(s):  
Complex Formation ◽  
Synaptonemal Complex ◽  
Secale Cereale ◽  
Chiasma Formation ◽  
Terminal Segment ◽  
Pachytene Nucleus ◽  
Synaptonemal Complexes ◽  
Synaptonemal Complex Formation ◽  
Chromosome 1R ◽  
Metaphase I

Four rye plants heterozygous for translocation 248, involving chromosomes 1R and 6R, were used for a comparative study of synaptonemal complex formation at midprophase I and chromosome configurations at metaphase I. Synaptonemal complexes were obtained with a cell-spreading technique and studied with electron microscopy. The total length of the synaptonemal complexes in the 28 analyzable pachytene nuclei varied considerably, both within and among plants. The variation of synaptonemal complex lengths of the bivalents in a nucleus was partly stage dependent; i.e., it was greater at early than at late pachytene. In all but one pachytene nucleus, pairing in the quadrivalent was regular, and the four pairing arms were usually easy to identify. Most noticeable was the variation of pairing saturation at the breakpoint of the quadrivalent. Pairing in the breakpoint region was delayed with respect to the pairing in the bivalents. Variation in the arm lengths of the quadrivalent was the result of incomplete and nonhomologous pairing at the breakpoint as well as differential contraction rates among chromosome segments. It was shown that the completion of delayed pairing throughout pachytene is mainly long-arm pairing. The actual breakpoint was therefore not in the middle of the unpaired segments, but more distal. The analysis of metaphase I nuclei revealed that chiasma frequency in this material was higher than in similar material used in former studies. When one of the translocation segments lacked a chiasma, this was in most cases the short translocated segment 1RS, the terminal segment of the satellite of chromosome 1R. Positive chiasma interference was demonstrated between the interstitial and exchanged segment in 1RS. This agreed with the observation of a negative correlation in extent of pairing between these two segments. Other interference phenomena, which have been described for this translocation in other material, remained undetected because of lack of variation in chiasma formation owing to high chiasma frequency.Key words: Secale cereale, meiosis, translocation, synaptonemal complex, metaphase I.

Microdissection and microcloning of rye ( Secale cereale L.) chromosome 1R

Chromosoma ◽  
1999 ◽  
Vol 108 (4) ◽  
pp. 250-255 ◽  
Author(s):  
Yihua Zhou ◽  
Zanmin Hu ◽  
Benyuan Dang ◽  
Huai Wang ◽  
Xiangdong Deng ◽  
...  
Keyword(s):  
Secale Cereale ◽  
Secale Cereale L ◽  
Chromosome 1R
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