Meiotic Behavior of Induced Reciprocal Translocation Heterozygote during Microsporogenesis of Brassica campestris L. (Brassicaceae)

A ditelosomic line was crossed with 12 identified monosomics. The metaphase I pairing was studied in the 40 + t – chromosome progenies. The telocentric chromosome was found to be homologous to the three previously identified monosomics namely, −7, −10, and −20 suggesting that the same chromosome is missing in all three lines. None of the chromosomes in monosomic condition used in the crosses except ST-7 and ST-17 from A. byzantina were involved in the reciprocal translocation present between Sun II and Garry and Rodney.The gene for normal vs. abaxial curling of the leaves was located on the short arm of chromosome 20. The genes for diploidisation and normal vs. kinky neck were located on 20L.

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Analysis of chiasma frequency and first meiotic segregation in a human male reciprocal translocation heterozygote, t(1;11) (p36.3;q13.1), using fluorescence in situ hybridisation

Cytogenetic and Genome Research ◽

10.1159/000133493 ◽

1993 ◽

Vol 63 (1) ◽

pp. 16-23 ◽

Cited By ~ 30

Author(s):

A.S.H. Goldman ◽

M.A. Hultén

Keyword(s):

Reciprocal Translocation ◽

Chiasma Frequency ◽

In Situ Hybridisation ◽

Fluorescence In Situ Hybridisation ◽

Meiotic Segregation ◽

Translocation Heterozygote ◽

Human Male

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Centromere orientation at metaphase I of a translocation heterozygote in lentil

Canadian Journal of Genetics and Cytology ◽

10.1139/g83-083 ◽

1983 ◽

Vol 25 (6) ◽

pp. 547-553 ◽

Cited By ~ 3

Author(s):

Frida Buruchin ◽

G. Ladizinsky

Keyword(s):

Reciprocal Translocation ◽

Acrocentric Chromosome ◽

Similar Length ◽

Translocation Heterozygote ◽

Ring Bivalents ◽

Acrocentric Chromosomes ◽

Number Of Cells ◽

Metaphase I

Reciprocal translocation between submetacentric and acrocentric chromosomes of lentil was studied. This interchange did not entail karyotypic changes. Two homomorphic ring bivalents produced by the four chromosomes of the translocation complex indicated that the long arm of the acrocentric chromosome was involved in the interchange. Chiasmata distribution in the native arms, the translocated and interstitial segments in bivalents and quadrivalents, was taken as an indication for two pairing pattern in the translocation complex. Chiasma terminalization in the short arm of the acrocentric chromosome of the translocation complex was faster in bivalents than in quadrivalents. The overwhelming number of cells with alternate-1 compared with alternate-2 orientation was attributed to the similar length of the zigzag diagonals of alternate-1 that apparently induced greater stability. The necessary elements for adjacent-2 orientation were available in the examined material but were practically absent. Pole–centromere specificity was proposed for explaining the absence of adjacent-2 in the present and other studies and the orientation of homologous centromeres to opposite poles even when they were located in different bivalents.

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Karyotypes and meiotic behavior of chromosomes in two male sterile strains of Brassica campestris L.

Hereditas ◽

10.1111/j.1601-5223.1988.tb00188.x ◽

2008 ◽

Vol 109 (1) ◽

pp. 93-97

Author(s):

YRJO VIINIKKA ◽

MATTI SOVERO

Keyword(s):

Brassica Campestris ◽

Meiotic Behavior ◽

Male Sterile

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Aberrant Meiotic Behavior of Chromosomes due to Reciprocal Translocation in the EDs Mutant of the Silkworm, Bombyx Mori

Hereditas ◽

10.1111/j.1601-5223.1996.00025.x ◽

2004 ◽

Vol 125 (1) ◽

pp. 25-29 ◽

Cited By ~ 3

Author(s):

Kosaku Sakaida ◽

Yutaka Banno ◽

Takashi Nakamura ◽

Yutaka Kawaguchi ◽

Katsumi Koga ◽

...

Keyword(s):

Bombyx Mori ◽

Reciprocal Translocation ◽

Meiotic Behavior ◽

Silkworm Bombyx Mori

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Meiotic chromosome segregation in human t(11;22)(q23;q11) carriers: a theoretical consideration

Genome ◽

10.1139/g89-405 ◽

1989 ◽

Vol 32 (1) ◽

pp. 24-29 ◽

Cited By ~ 3

Author(s):

Prasad R. K. Koduru ◽

R. S. K. Chaganti

Keyword(s):

Chromosome Segregation ◽

Reciprocal Translocation ◽

Theoretical Consideration ◽

Segregation Analysis ◽

Meiotic Chromosome ◽

Meiotic Behavior ◽

Chromosomal Constitution ◽

Familial Cases ◽

Cytogenetic Data ◽

A Chain

The t(11;22)(q23;q11) translocation is the most frequently encountered familial reciprocal translocation in humans. In the majority of reported cases ascertainment has been through the birth of a child with the chromosomal constitution 47,XX, +der(22) or 47,XY, +der(22), i.e., tertiary trisomy. Previous segregation analysis of familial cases showed a number of interesting features. Thus, euploid unbalanced genotypes resulting from adjacent segregation are absent in the progeny, and only tertiary trisomic offspring are recovered. To explain this unusual progeny output we present here a model for the meiotic behavior of this translocation in the carriers based on an analysis of cytogenetic data of progeny of carriers. This model predicts the formation of a chain trivalent with chromosome order 11-der(11)-22 during prophase I and its predominant alternate orientation at metaphase I.Key words: human, t(11;22)(q23;q11), meiosis, segregation.

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