Skip to main content

19 Result(s)

within U. C. Lavania Remove this filter

and

  1. Article

    Chromosome identification—evolving technology from elucidating condensed chromatin to DNA molecules

    A. K. Sharma, U. C. Lavania in The Nucleus (2015)

    Download PDF (355 KB) View Article

  2. Article

    Five-point plan to revive and reform Indian science

    U. C. Lavania in Nature (2007)

    Download PDF (202 KB) View Article

  3. Article

    It's easier to patent plants than to publish research

    U. C. Lavania in Nature (2006)

    Download PDF (77 KB) View Article

  4. No Access

    Article

    High resolution FISH to delineate contiguous and small DNA sequences

    Somatic and meiotic metaphase, and pachytene chromosomes were subjected to DNA: DNA in situ hybridization to elucidate relative resolution of FISH signals for weak/contiguous hybridization sites. Hybridization wi...

    U.C. Lavania in Methods in Cell Science (2001)

  5. No Access

    Article

    Enhancing the productivity of secondary metabolites via induced polyploidy: a review

    Artificial polyploidy generally enhances the vigour of determinate plant parts and may be favourable where vegetative organs and biomass constitute the economic product. Giving suitable examples, it is shown t...

    O. P. Dhawan, U. C. Lavania in Euphytica (1996)

  6. No Access

    Article

    A simple parameter of dispersion index that serves as an adjunct to karyotype asymmetry

    In order to refine the measure of karyotype asymmetry a new chromosomal parameter of dispersion index is proposed that has the potential to decipher even the minor karyotypic variations, thus permitting furthe...

    U. C. Lavania, Sangeeta Srivastava in Journal of Biosciences (1992)

  7. Article

    Genetic variation in meiotic behaviour and fertility in tetraploid Hyoscyamus muticus: correlation with diploid meiosis

    Autotetraploidy was induced in 19 morphologically distinct genotypes of the medicinal solanaceous plant Hyoscyamus muticus (Egyptian henbane, 4x= 56). The multivalent association frequencies at metaphase I of mei...

    Sangeeta Srivastava, U C Lavania, J Sybenga in Heredity (1992)

    Download PDF (3982 KB)

  8. No Access

    Article

    Enhanced productivity of tropane alkaloids and fertility in artificial autotetraploids of Hyoscyamus niger L.

    Genetically stable artificial autotetraploids with over 90% seed set were obtained by colchicine treatment of the solanaceous species Hyoscyamus niger L. (2n=4x=68). The tetraploids were vigorous and yielded 22.5...

    U. C. Lavania, Sangeeta Srivastava in Euphytica (1991)

  9. No Access

    Article

    Evolutionary genomic change paralleled by differential responses of 2× and 4× calli cultures

    A comparative account of numerical chromosome variation in 2× and 4× callus cultures ofHyoscyamus muticus examined at monthly intervals reveals that both types of calli tend to attain a genomic flux around 4×. Pa...

    U. C. Lavania, S. Srivastava in Experientia (1990)

  10. No Access

    Article

    Enhanced productivity of the essential oil in the artificial autopolyploid of vetiver (Vetiveria zizanioides L. Nash)

    Artificial autotetraploids were produced by colchicine treatment in the important essential oil bearing vetiver (2n=20). The raw tetraploids were stabilised by selection for pure types in segregating vegetativ...

    U. C. Lavania in Euphytica (1988)

  11. No Access

    Article

    Ploidy dependence of chromosomal variation in callus cultures ofHyoscyamus muticus L.

    Remarkable variation for chromosome number was observed in both diploid (2x) and autotetraploid (4x) callus cultures continuously examined for 12 months at monthly subsculture intervals. Initially, the subcult...

    U. C. Lavania, Sangeeta Srivastava in Protoplasma (1988)

  12. No Access

    Article

    Chromosomal instability in lemon grass, Cymbopogon flexuosus (Steudel) Wats

    Somatic mitoses in C. flexuosus exhibit a significant degree of chromosomal instability leading to nearly 33% cells with chromosome elimination. A range of chromosome numbers between 20-8 (most common being 2n=20...

    U. C. Lavania in Genetica (1987)

  13. No Access

    Article

    Genetic improvement of Egyptian henbane, Hyoscyamus muticus L. through induced tetraploidy

    Induced autotetraploids with high pollen and seed fertility have been developed in a medicinally important Solanaceous plant: Hyoscyamus muticus (2n=28). The colchiploids are vigorous and the increase in all the ...

    U. C. Lavania in Theoretical and Applied Genetics (1986)

  14. No Access

    Article

    Radiation-induced hyperdiploidy inHyoscyamus niger L

    A hyperdiploid plant type, approaching the triploid chromosome number, and representing possibly a high level of tetrasomy, was recorded in the progeny of a gamma ray-induced unbranched desynaptic mutant in the M

    U. C. Lavania, R. K. Lal, J. R. Sharma in Experientia (1985)

  15. No Access

    Article

    Mitotic spatial model: Arrangement of homologous chromosomes

    Two different mitotic spatial models (Lavania & Sharma, Biosystems 14: 171–178, 1981: Ashley & Pocock, Genetica 55: 161–169, 1981) for the arrangement of the chromosomes in the nucleus are analysed for the sak...

    U. C. Lavania, A. K. Sharma in Genetica (1984)

  16. No Access

    Article

    On the interchromosomal connections in plants

    Using Giemsa C-banding technique, the existence of interchromosomal connections in well spread root tip metaphase plates in a variety of plant species has been demonstrated. Various types of interchromosomal c...

    U. C. Lavania, A. K. Sharma in Experientia (1984)

  17. No Access

    Article

    Chromosome banding in evolutionary plant cytogenetics

    The introduction of chromosome banding techniques for linear differentiation of chromosomes have allowed the identification of the heterochromatic segments on the chromosomes. These heterochromatic segments ar...

    U C Lavania, A K Sharma in Proceedings / Indian Academy of Sciences (1983)

  18. No Access

    Article

    Chromosomal instability in Lathyrus sativus L.

    In Lathyrus sativus (2n=14), variety ‘LSD-1’ shows an instability of somatic chromosome number which can be observed in root tip and shoot tip mitoses. In this variety, approximately 54% of the seedlings showed i...

    U. C. Lavania in Theoretical and Applied Genetics (1982)

  19. No Access

    Article

    Naturally occurring translocation dicentric chromosomes and somatic reduction inLathyrus sativus L.

    A naturally-occurring case of terminal translocation resulting into end-to-end association of somatic chromosomes, and mitotic anaphase movement without chromatid separation in a variety ofLathyrus sativus is rep...

    U. C. Lavania, Seshu Lavania in Experientia (1982)