Non-random inheritance of organellar genomes in symmetric and asymmetric somatic hybrids between Lycopersicon esculentum and L. pennellii

1992 ◽  
Vol 84-84 (3-4) ◽  
pp. 435-442 ◽  
Author(s):  
A. B. Bonnema ◽  
J. M. Melzer ◽  
L. W. Murray ◽  
M. A. O'Connell
Keyword(s):  
Lycopersicon Esculentum ◽  
Somatic Hybrids ◽  
Asymmetric Somatic Hybrids ◽  
Organellar Genomes

Fertile asymmetric somatic hybrids between Lycopersicon esculentum Mill. and Lycopersicon peruvianum var. dentatum Dun.

1993 ◽  
Vol 236-236 (2-3) ◽  
pp. 427-432 ◽  
Author(s):  
Yakov I. Ratushnyak ◽  
Nickolai N. Cherep ◽  
Anna V. Zavgorodnyaya ◽  
Sergei A. Latypov ◽  
Irina V. Borozenko ◽  
...  
Keyword(s):  
Lycopersicon Esculentum ◽  
Somatic Hybrids ◽  
Lycopersicon Peruvianum ◽  
Asymmetric Somatic Hybrids ◽  
Lycopersicon Esculentum Mill

UV irradiation as a tool for obtaining asymmetric somatic hybrids between Nicotiana plumbaginifolia and Lycopersicon esculentum

1997 ◽  
Vol 94 (2) ◽  
pp. 184-191 ◽  
Author(s):  
M. Vlahova ◽  
S. Hinnisdaels ◽  
F. Frulleux ◽  
M. Claeys ◽  
A. Atanassov ◽  
...  
Keyword(s):  
Lycopersicon Esculentum ◽  
Uv Irradiation ◽  
Somatic Hybrids ◽  
Nicotiana Plumbaginifolia ◽  
Asymmetric Somatic Hybrids

Asymmetric somatic hybrids between Lycopersicon esculentum and irradiated Lycopersicon peruvianum

1990 ◽  
Vol 80 (3) ◽  
pp. 305-312 ◽  
Author(s):  
J. Wijbrandi ◽  
A. Posthuma ◽  
J. M. Kok ◽  
R. Rijken ◽  
J. G. M. Vos ◽  
...  
Keyword(s):  
Lycopersicon Esculentum ◽  
Somatic Hybrids ◽  
Lycopersicon Peruvianum ◽  
Asymmetric Somatic Hybrids

UV dose-dependent DNA elimination in asymmetric somatic hybrids between Brassica napus and Arabidopsis thaliana

Plant Science ◽  
1998 ◽  
Vol 131 (1) ◽  
pp. 65-76 ◽  
Author(s):  
Johanna Forsberg ◽  
Christina Dixelius ◽  
Ulf Lagercrantz ◽  
Kristina Glimelius
Keyword(s):  
Arabidopsis Thaliana ◽  
Brassica Napus ◽  
Somatic Hybrids ◽  
Asymmetric Somatic Hybrids ◽  
Dna Elimination ◽  
Uv Dose ◽  
Dose Dependent

Chromosome pairing and potential for intergeneric recombination in some hypotetraploid somatic hybrids of Lycopersicon esculentum (+) Solanum tuberosum

Genome ◽  
1993 ◽  
Vol 36 (6) ◽  
pp. 1032-1041 ◽  
Author(s):  
J. H. de Jong ◽  
A. M. A. Wolters ◽  
J. M. Kok ◽  
H. Verhaar ◽  
J. van Eden
Keyword(s):  
Solanum Tuberosum ◽  
Lycopersicon Esculentum ◽  
Synaptonemal Complex ◽  
Chromosome Pairing ◽  
Somatic Hybrids ◽  
Cytogenetic Study ◽  
Unreduced Gametes ◽  
Root Tip ◽  
Prophase I ◽  
Metaphase I

Three somatic hybrids resulting from protoplast fusions of a diploid kanamycin-resistant line of tomato (Lycopersicon esculentum) and a dihaploid hygromycin-resistant transformant of a monohaploid potato (Solanum tuberosum) line were used for a cytogenetic study on chromosome pairing and meiotic recombination. Chromosome counts in root-tip meristem cells revealed two hypotetraploids with chromosome complements of 2n = 46 and one with 2n = 47. Electron microscope analyses of synaptonemal complex spreads of hypotonically burst protoplasts at mid prophase I showed abundant exchanges of pairing partners in multivalents involving as many as eight chromosomes. In the cells at late pachytene recombination nodules were found in multivalents on both sides of pairing partner exchanges, indicating recombination at both homologous and homoeologous sites. Light microscope observations of pollen mother cells at late diakinesis and metaphase I also revealed multivalents, though their occurrence in low frequencies betrays the reduction of multivalent number and complexity. Precocious separation of half bivalents at metaphase I and lagging of univalents at anaphase I were observed frequently. Bridges, which may result from an apparent inversion loop found in the synaptonemal complexes of a mid prophase I nucleus, were also quite common at anaphase I, though the expected accompanying fragments could be detected in only a few cells. Most striking were the high frequencies of first division restitution in preparations at metaphase II/anaphase II, giving rise to unreduced gametes. In spite of the expected high numbers of balanced haploid and diploid gametes, male fertility, as revealed by pollen staining, was found to be negligible.Key words: synaptonemal complex, recombination, chromosome pairing, somatic hybrid, Lycopersicon esculentum (+) Solanum tuberosum.

Genome reorganization in Nicotiana asymmetric somatic hybrids analysed by in situ hybridization

1992 ◽  
Vol 2 (6) ◽  
pp. 863-874 ◽  
Author(s):  
A. S. Parokonny ◽  
A. Y. Kenton ◽  
Y. Y. Gleba ◽  
M. D. Bennett
Keyword(s):  
In Situ Hybridization ◽  
Somatic Hybrids ◽  
Asymmetric Somatic Hybrids ◽  
Genome Reorganization
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