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  • Triticum aestivum  (38)
  • Springer  (38)
  • AGU (American Geophysical Union)
  • American Institute of Physics
  • Institut für Polarökologie Kiel
  • Lipsius & Tischer
  • Springer Nature
  • Taylor & Francis
  • Western Atlas International
  • Wiley
  • 2020-2022
  • 1985-1989  (38)
  • 1890-1899
  • 1987  (38)
  • 1898
Collection
Keywords
Publisher
  • Springer  (38)
  • AGU (American Geophysical Union)
  • American Institute of Physics
  • Institut für Polarökologie Kiel
  • Lipsius & Tischer
    • +
Years
  • 2020-2022
  • 1985-1989  (38)
  • 1890-1899
Year
  • 11
    Electronic Resource
    Electronic Resource
    A somaclonal variant of wheat with additional β-amylase isozymes (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 459-464 
    Details
    ISSN: 1432-2242
    Keywords: β-amylase ; Isozymes ; Triticum aestivum ; Somaclonal variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The progeny of 149 plants regenerated from tissue culture of immature wheat (Triticum aestivum) embryos were screened for variation in their grain β-amylase isozyme pattern. One regenerant was found which was heterozygous for a variant pattern characterized by the presence of at least five new isozyme bands, as well as an increased intensity in existing bands in two more positions. The F2 of a homozygous variant crossed back to the parent segregated in an approximate 3∶1 ratio but resolution of the gels was not sufficient to distinguish whether this represents a dominant or co-dominant single mutant gene. No chromosome abnormalities were evident in mitosis or meiosis of the homozygous variant or in the F1 of the variant crossed back to the parent. No recombination has been seen between the variant bands and production of multiple bands from a single locus is consistent with the nature of the known β-amylase loci. However, the variant bands were not evident in a survey of 111 diverse genotypes, nor were they present in developing grain of the parent cultivar. Therefore, this variant could represent a rare mutation leading to expression of a currently unexpressed locus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00262516
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  • 12
    Electronic Resource
    Electronic Resource
    Genetics of resistance to Puccinia graminis tritici in ‘Chris’ and ‘W3746’ wheats (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 846-855 
    Details
    ISSN: 1432-2242
    Keywords: Puccinia graminis tritici ; Triticum aestivum ; Monosomic analysis ; Rust resistance ; Gene identification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary ‘Chris’ wheat possessed genes Sr5, Sr7a, Sr8a, Sr9g and Sr12. ‘W3746’, derived from the cross ‘Chris’/‘Baart’, possessed Sr7a and Sr12. The response conferred by Sr7a was influenced by the genetic background. Although Sr7a or Sr12 alone conferred no observable resistance upon adult plants, the adult resistances of ‘Chris’ and ‘W3746’ to predominant pathotypes appeared to be associated with the interaction of Sr7a and Sr12, or genes at closely linked loci.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00289389
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  • 13
    Electronic Resource
    Electronic Resource
    Chromosomal location of a K/Na discrimination character in the D genome of wheat (1987)
    Springer
    Theoretical and applied genetics 74 (1987), S. 584-588 
    Details
    ISSN: 1432-2242
    Keywords: Triticum aestivum ; T. turgidum ; Aegilops squarrosa ; Cation uptake ; D genome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary K/Na ratios have been determined in the leaves of salt-treated plants of 14 disomic substitution lines in which each of the D-genome chromosomes replaces the homoeologous A- or B-genome chromosome in the tetraploid wheat variety Langdon (AABB genome). Aneuploid lines of hexaploid bread wheat (cv Chinese Spring) having a reduced or an enhanced complement of chromosome 4D have also been examined. These investigations show that the gene(s) determining K/Na ratios in the leaves of wheat plants grown in the presence of salt is located on the long arm of chromosome 4D.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00288856
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  • 14
    Electronic Resource
    Electronic Resource
    Cytogenetic analysis of structural rearrangements in three varieties of common wheat, Triticum aestivum (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 635-645 
    Details
    ISSN: 1432-2242
    Keywords: Common wheat ; Triticum aestivum ; Structural rearrangements ; Translocation ; Interchange ; Duplication-deficiency ; Aneuploidy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The winter wheat varieties ‘Starke’ and ‘Cappelle Desprez’ and the spring wheat ‘Chinese Spring’ were analysed for structural chromosome rearrangements that resulted in the formation of multivalents in F1 hybrids. The analyses were carried out using hybrids involving euploids, monosomic and ditelosomic stocks, and double-monotelodisomic constructs. The study confirmed that ‘Cappelle Desprez’ differs from ‘Chinese Spring’ in a reciprocal translocation between chromosomes 5B and 7B (Riley et al. 1967); a translocation involving chromosomes 3B and 3D could not be verified. Furthermore, the analysis showed that ‘Starke’ differs from ‘Chinese Spring’ in a reciprocal translocation between chromosomes 7A and 7D. Both translocations have a coefficient of multivalent realisation of about 0.84. Further multivalents in euploid ‘Starke’, in euploid and some aneuploid stocks of ‘Cappelle Desprez’, and in euploid as well as various types of aneuploid hybrids between all three varieties could nearly all be explained hypothesizing that chromosome 2B of both ‘Starke’ and ‘Cappelle Desprez’ is a duplication-deficiency chromosome. In the hypothesis a part of the long arm of 2B is missing and replaced by a duplicated part of the long arm of chromosome 2D. The multivalents of this rearrangement showed an average coefficient of realisation of about 0.09.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260770
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  • 15
    Electronic Resource
    Electronic Resource
    The peroxidase isozymes of the wheat kernel: tissue and substrate specificity and their chromosomal location (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 701-706 
    Details
    ISSN: 1432-2242
    Keywords: Triticum aestivum ; Peroxidases ; Tissue and substrate-specificity ; Chromosomal location
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Peroxidase isozymes were studied in the Triticum aestivum L. kernel and in nullisomic-tetrasomic and ditelocentric combinations of ‘Chinese Spring’ wheat. Analyses were carried out on different parts of dry kernels (embryo plus scutellum and endosperm) using polyacrylamide and starch gel electrophoresis, different electrophoretic buffer systems and various staining methods. The peroxidase isozymes showed a low substrate-specificity and a high tissue-specificity. The embryo plus scutellum and the endosperm always presented different peroxidase patterns. Endosperm peroxidases were associated with chromosome arms 7DS, 4BL and 7AS; whereas the embryo plus scutellum isozymes were related to chromosome arms 3AL, 3BL and 3DS. The different results obtained using various electrophoretic techniques are due to the buffer system used. All staining procedures employed revealed the same peroxidase isozymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260779
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  • 16
    Electronic Resource
    Electronic Resource
    Variability and genetics of spacer DNA sequences between the ribosomal-RNA genes of hexaploid wheat (Triticum aestivum) (1987)
    Springer
    Theoretical and applied genetics 74 (1987), S. 617-624 
    Details
    ISSN: 1432-2242
    Keywords: Triticum aestivum ; Ribosomal RNA ; Nor alleles ; Nucleolar organiser regions ; Restriction fragment length polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Using restriction enzyme digests of genomic DNA extracted from the leaves of 25 hexaploid wheat (Triticum aestivum L. em. Thell.) cultivars and their hybrids, restriction fragment length polymorphisms of the spacer DNA which separates the ribosomal-RNA genes have been examined. (From one to three thousand of these genes are borne on chromosomes 1B and 6B of hexaploid wheat). The data show that there are three distinct alleles of the 1B locus, designated Nor-B1a, Nor-B1b, and Nor-B1c, and at least five allelic variants of the 6B locus, designated Nor-B2a, Nor-B2b, Nor-B2c, Nor-B2d, and Nor-B2e. A further, previously reported allele on 6B has been named Nor-B2f. Chromosome 5D has only one allelic variant, Nor-D3. Whereas the major spacer variants of the 1B alleles apparently differ by the loss or gain of one or two of the 133 bp sub-repeat units within the spacer DNA, the 6B allelic variants show major differences in their compositions and lengths. This may be related to the greater number of rDNA repeat units at this locus. The practical implications of these differences and their application to wheat breeding are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00288861
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  • 17
    Electronic Resource
    Electronic Resource
    A new selection criterion for yield in wheat (1987)
    Springer
    Theoretical and applied genetics 74 (1987), S. 275-279 
    Details
    ISSN: 1432-2242
    Keywords: Triticum aestivum ; Wheat ; Biomass ; Harvest index ; Selection criterion ; Tiller mortality ; Modified selection procedure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The mortality of young tillers to an extent of 36.5% under optimum cultural conditions was recorded in a field experiment. Attention is drawn to the necessity of minimising this loss and to diverting it towards productive tillers by applying selection pressure. Future yield advances may be achieved by selecting genotypes which tiller moderately in the vegetative phase, most of which survive to produce grains. The character association of each variety under consideration was studied for the suitability towards this objective. A modified selection procedure is suggested which may be advantageously applied to achieve this objective. The proposed new methodology may also be effectively applied to such other cereal crops as barley, triticale and oats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00289980
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  • 18
    Electronic Resource
    Electronic Resource
    Disappearance of plastid and mitochondrial nucleoids during the formation of generative cells of higher plants revealed by fluorescence microscopy (1987)
    Springer
    Protoplasma 141 (1987), S. 149-159 
    Details
    ISSN: 1615-6102
    Keywords: Fluorescence microscopy ; Maternal inheritance ; Plastid nucleoid ; Mitochondrial nucleoid ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The fate of plastid and mitochondrial nucleoids (pt and mt nucleoids) ofTriticum aestivum was followed during the reproductive organ formation using fluorescence microscopy after staining with 4'6-diamidino-2-phenylindole (DAPI). This investigation showed a drastic morphological change of pt nucleoids during the differentiation of reproductive organs from the shoot apex. Dot-shaped pt nucleoids grew into ring-shaped ones, which divided into small pieces in the monocellular pollen grain, as observed in this plant's earlier stage of leaf development. During the development of mature pollen grain from monocellular pollen grain, pt and/or mt nucleoids disappeared through the division of the male generative cell ofT. aestivum. Cytologically, this observation is direct evidence of the maternal inheritance of higher plants. Thus far, cytological evidence of this phenomenon has been found mostly by morphological criteria using electron microscopy, which admits some ambiguity. In the plants exemplified byLilium longiflorum, pt and/or mt nucleoids disappeared after the first pollen grain mitosis, which precededT. aestivum. In the plants exemplified byTrifolium repens, pt and/or mt nucleoids existed in the generative cells of the mature pollen grain. The significance of these observations was discussed in relation to the interaction between nuclear and organelle genomes during plant development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01272897
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  • 19
    Electronic Resource
    Electronic Resource
    A proposed method of polyacrylamide gel electrophoresis in acid environments applied to gliadins of wheat grains (1987)
    Springer
    Euphytica 36 (1987), S. 55-60 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; electrophoresis system ; acid polyacrylamide gel ; gliadins ; variety identification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In this paper we describe the method of wheat gliadin electrophoresis in use at RIVRO, Wageningen. It differs from other techniques mainly by the application of an alternative buffer system, making it possible to polymerise the gels in a buffered alkaline environment and to perform the run at pH 3.1 without extensive buffer changing steps. Advantages are a greater gel reproducibility and the ease of gel handling. Furthermore, a rationalised protein extraction procedure, a cheap shaking system for staining baths and a better (slower moving) tracking dye are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00730647
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  • 20
    Electronic Resource
    Electronic Resource
    Vernalization of immature embryos of winter wheat genotypes (1987)
    Springer
    Euphytica 36 (1987), S. 161-165 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; winter wheat ; vernalization ; cold treatment ; immature embryos ; excised embryos ; embryo culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effect of direct vernalization of immature embryos on flowering was studied in six winter wheat genotypes. Fourteen-, 17-, and 20-day-old embryos were excised and vernalized for 0–6 weeks on synthetic medium during a conditioning period. Percent germination of embryos was high (overall 96.1%), and free from genotypic effects. Genotypes differed for flowering in response to cold treatment of excised embryos. Embryo vernalization was as effective as or more than conventional vernalization (control, seedling vernalization for 6 weeks). Seventeen-day-old embryos were the most responsive to vernalization. With a 5-week vernalization of 17-day-old embryos, the percentage of plants anthesed was higher than those from 14-and 20-day-old embryos. For 17-day-old embryos vernalized for 5 weeks, the mean number of days from culture to anthesis was less than that of 6 week vernalization, less than that of 14- and 20-day-old embryos, and less than controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00730659
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