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  • 1
    Electronic Resource
    Electronic Resource
    Differential effects of hydroxylamine and ethyl methane sulphonate on potato virus X (1970)
    Springer
    Naturwissenschaften 57 (1970), S. 136-137 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600071
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  • 2
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic Acid and the Ancestry of Wheat (1963)
    [s.l.] : Nature Publishing Group
    Nature 200 (1963), S. 713-714 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. MEAN DNA CONTENT (IN ARBITRARY UNITS) OF 4〈J NUCLEI IN SPECIES OF Triticum AND Aegilops No. of Mean DNA content Coefficient Species 2n measure- in arbitrary of ments units S.E. variance T. monococcum strain 1 14 115 28-06 0-36 13-8 T. monococcum strain 2 14 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/200713a0
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  • 3
    Electronic Resource
    Electronic Resource
    Cytoplasmically Determined Expression of Symptoms of Potato Virus X Crosses between Species of Capsicum (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 1341-1342 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Reciprocal crosses were attempted using C. annuum and C. pendulum as parents. The cross involving C. pendulum as female parent was successful and produced F! seeds. But the reciprocal cross involving C. annuum as female parent was not successful. When, however, C.annuum was used as female parent in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2201341a0
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  • 4
    Electronic Resource
    Electronic Resource
    Peroxidase isoenzyme associated with theAegilops umbellulata chromosome segment transferred to chinese spring (Triticum aestivum) (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 613-614 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Des essais par électrophorèse à gel avaient révélé dans les tissus de semis de 8 jours du Transfert (IC 13296) la présence d'une isoenzyme de péroxydase, Px-5c, qui ne se trouve pas chez la variété parente, «Chinese Spring». Il est suggéré que cette isoenzyme basique de péroxydase supplémentaire est le produit de renseignements génétiques transmis par le segment de chromosome de l'umbellulata.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02153806
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  • 5
    Electronic Resource
    Electronic Resource
    Genome analysis in Triticum zhukovskyi, a new hexaploid wheat (1963)
    Springer
    Chromosoma 14 (1963), S. 589-600 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The karyotype of T. zhukovskyi, a hexaploid wheat recently recorded from Western Georgia of the U.S.S.R., revealed that it has 3 pairs of satellited chromosomes. Two of these resemble closely the two pairs present in T. timopheevi. The other pair is similar in arm ratio to the pair found in T. monococcum var. hornemanni. Micro-satellites usually found in varieties of T. monococcum did not occur in T. zhukovskyi. 2. A maximum of 4 quadrivalents per cell was found at meiosis in T. zhukovskyi, the average being 1.35 per cell. Pollen and seed fertility were normal. 3. In crosses between T. zhukovskyi and T. spelta, T. macha and T. vavilovi, only the F1 plants of the cross with spelta survived. There was an average frequency of 15.1 univalents per cell in the zhukovskyispelta hybrid. Thus, the partial failure of chromosome pairing in this hybrid is similar to that usually found in hybrids between T. timopheevi and other tetraploid species. 4. From a discussion of the data, it is suggested that T. zhukovskyi might have arisen through chromosome doubling in the hybrid T. timopheevi × T. monococcum var. hornemanni. If this conclusion is supported by future experiments, T. zhukovskyi will be the first hexaploid wheat to have a genomic constitution other than ABD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326513
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  • 6
    Electronic Resource
    Electronic Resource
    Chromosome diminution and evolution of polyploid species in triticum (1961)
    Springer
    Chromosoma 12 (1961), S. 398-409 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The length of the chromosome complements of T. monococcum, Ae. speltoides var. ligustica and Ae. squarrosa, the donors of the A, B and D genomes respectively of T. aestivum, varied in the ratio 1.0 ∶ 1.24 ∶ 0.76. The proportion of the total lengths of the chromosomes belonging to the A, B and D genomes in the bread wheat variety Chinese Spring, as calculated from the data of Sears (1954), also falls into a similar ratio (1.0 ∶ 1.28 ∶ 0.84). 2. T. monococcum, T. dicoccum and T. aestivum differed in the proportion 1.0 ∶ 1.5 ∶ 2.0 as regards chromosome length and not as 1.0 ∶ 2.24 ∶ 3. 0 as would be expected from the additive value of the total chromosome length of the concerned genome donors. 3. The DNA content of individual nuclei in the species studied varied in proportion to chromosome length, thus indicating that the DNA content per unit length of chromosome is constant in the material studied. 4. The type of karyotype asymmetry in the different Triticum and Aegilops species was classified according to the scheme of Stebbins (1958). The diploid species had the most symmetrical and the hexaploids, the most asymmetrical karyotype. No prominent heterochromatic segment could be detected in any of the species. 5. The data indicate that a considerable degree of elimination of chromosomal material has taken place in tetraploid and hexaploid wheats subsequent to their origin. It is suggested that this might have been an important factor in the conversion of tetraploid and hexaploid wheats into functional diploids. A combination of the multivalent gene suppressor system and chromosome elimination appears to have led to a synthesis of the advantageous features of auto- and allo-polyploidy in tetraploid and hexaploid wheats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00328933
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  • 7
    Electronic Resource
    Electronic Resource
    Localized chromosome breakage induced by ethyl-methane-sulfonate and hydroxylamine in Vicia faba (1964)
    Springer
    Chromosoma 15 (1964), S. 156-169 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Secondary root meristems of Vicia faba were treated with (a) 0.2% aqueous solution of ethyl-methane-sulfonate, for two hours, (b) aqueous solution of hydroxylamine (1 mg/ml) for 2 hours and (c) a mixture of these two agents in the proportion of 1∶1, for 1 hour; and allowed to revive. Root tips were fixed at various revival periods, from 12 hrs. to 84 hrs. These two agents are known to attack guanine and cytosine of the DNA molecule respectively. 2. Metaphase and anaphase breaks were screened and the breakage points were determined for the genome of Vicia faba. These breakage points were found to be localized and these regions were found to coincide with some of the known heterochromatic regions, of M and Sb chromosomes. Both the agents induced breaks in chromosomes exclusively on these points. 3. Centromeric regions were found to be affected by treatment with EMS as well as HA, as revealed by centric breaks as well as inactivation of centromeric activity. 4. The mechanism of action of these agents and the possible reasons for these localized effects are discussed. 5. From the data presented as well as those available in the literature on localized chromosome breaks with chemical mutagens, the possibility of mapping regions of chromosomes rich in guanine-cytosine pairs of bases and regions rich in adenine-thymine pairs of bases, is pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285727
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  • 8
    Electronic Resource
    Electronic Resource
    Structure of the secondary constriction region of the satellited chromosomes in triticinae (1963)
    Springer
    Naturwissenschaften 50 (1963), S. 381-381 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600757
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  • 9
    Electronic Resource
    Electronic Resource
    Efficacy of triazoles for in vitro microtuber production in potato (1992)
    Springer
    Potato research 35 (1992), S. 339-341 
    Details
    ISSN: 1871-4528
    Keywords: triazoles ; in-vitro ; microtubers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Experiments were conducted to evaluate the efficacy of two triazoles, triadimefon and uniconazole, compared to benzylaminopurine (BAP) for in vitro microtuber production in three leading Indian cultivars, Kufri Jyoti, Kufri Badshah and Kufri Sindhuri. Both triazoles were effective in microtuber production, and at the lowest concentration tested (0.01 mg 1−1) uniconazole was more effective in producing higher numbers and average weight of microtubers than 10 mg 1−1 of BAP, although the best results were obtained with 0.5 mg 1−1 of uniconazole. This is the first report of triazole-induced stimulation of in vitro microtuber production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02357716
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  • 10
    Electronic Resource
    Electronic Resource
    Morpho-physiological behaviour of potato bolters (1971)
    Springer
    Potato research 14 (1971), S. 292-296 
    Details
    ISSN: 1871-4528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Plants raised from the tubers of normal and bolters ofSolanum tuberosum L. cv.Kufri Chandramukhi, when grown under short day (SD) and long day-continuous light (LD), differed in their haulm growth, chlorophyll content, stolon and tuber growth, and activity of different peroxidase isoenzymes in stolon. Under LD the normal plants grew taller, had more leaves and produced floral buds whereas bolters under SD behave like LD-grown normal plants. Since both bolters and normals tuberised only under SD, the qualitative short day nature of the variety does not change with its bolting nature. The stolons of normal and bolters grown under two photoperiods do not differ in the number of peroxidase isoenzymes, but the activity of isoenzymes differs considerably both with photoperiod and the nature of plants. The results are discussed in the light of available literature on the subject.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02355992
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