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  • 1
    Electronic Resource
    Electronic Resource
    Study on induced mutants resembling commercial varieties in bread wheat (1978)
    Springer
    Theoretical and applied genetics 53 (1978), S. 125-128 
    Details
    ISSN: 1432-2242
    Keywords: Induced mutation ; Bread wheat ; Multiline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The occurrence of variants with phenotypic resemblance to the existing cultivated varieties of wheat, such as ‘Sonalika’, ‘Arjun’ and ‘Kalyansona’, evolved by hybridisation, has been found in various generations of the mutagen-treated populations of the variety ‘Zaafrane’. The repetition and involvement of common genes in certain genotypes in the evolutionary history of these varieties is attributed to the induction of such intervarietal mutants. It is shown that selective reconstruction of a particular variety in bread wheat is not only possible, but also relatively easy, especially from a closely related variety. The study opens the possibility of utilising this method as a technique for developing components of a multiline.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272689
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  • 2
    Electronic Resource
    Electronic Resource
    The role of ‘Norin 10’ dwarfing genes in photosynthetic and respiratory activity of wheat leaves (1981)
    Springer
    Theoretical and applied genetics 60 (1981), S. 81-84 
    Details
    ISSN: 1432-2242
    Keywords: Wheat ; ‘Norin 10’ dwarfing genes ; Photosynthesis ; Respiration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A comparative analysis of eight cultivars of spring wheat (Triticum aestivum) classified by height as tall (T), semi-dwarf (D1), dwarf (D2) and very dwarf (D3) was conducted to study their efficiency of oxygen exchange during photosynthesis and dark respiration. Two cultivars were included in each height group. Cultivars carrying ‘Norin 10’ dwarfing genes (D1, D2 and D3) were found to have a significantly higher photosynthetic rate per unit leaf area than talls (T) that lack these genes. Among the ‘Norin’ gene carriers, dwarf group (D2) was most efficient, followed by very dwarf (D3) and semi-dwarf (D1). Photosynthetic rate and respiratory rate were found to have a positive relationship.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00282421
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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    A modified pedigree method of selection (1989)
    Springer
    Theoretical and applied genetics 78 (1989), S. 173-176 
    Details
    ISSN: 1432-2242
    Keywords: Wheat ; Tiller index ; Competitive ability ; Interplant competition ; Modified pedigree method of selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A dismal 81% failure of newly bulked lines against checks was observed in Indian wheat material evolved by the pedigree method. This is considered to be the consequence of selection in space planting in early generations followed by yield tests in a competitive environment which did not allow any scope of selection for competitive ability. Thus, most of the homozygous lines, which were until now raised and carried forward under space planting, failed to compete with the checks for yield in close planting. It is, therefore, necessary to modify the method to combine both the competitive ability and identity of selected plants. The proposed modified procedure involves raising the population under spaced planting as well as under drilling from F2 onwards. Evaluation for tiller index marks an important step. On the basis of tiller index, single plants are isolated from spaced populations. Steps of the modified procedure are outlined in detail. The modified method, which economises on breeders' workload and other physical inputs, besides having other advantages, can also be used for certain other grain crops. Preliminary results based on the modified method during the past two seasons have indicated its utility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00288795
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  • 5
    Electronic Resource
    Electronic Resource
    Genetics of resistance to an isolate of Alternaria triticina causing leaf blight of wheat (1976)
    Springer
    Euphytica 25 (1976), S. 769-775 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; Alternaria triticina ; leaf blight ; resistance ; genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Genetics of field resistance to Alternaria triticina was studied in a diallel set of crosses using ten cultivars of wheat which included eight resistant and two susceptibles. Susceptibility if NP 830 was found to be controlled by a dominant gene and that of NP 891 by two dominant complementary genes. The resistant cultivars NP 824, NP 835, NP 852, C 281, E 5477, E 5550, E 5878 and UP 303 carry the recessive alleles of the genes present in NP 830 and NP 891. All the resistant cultivars used in the study carried identical gene(s) for resistance to A. triticina. The gene(s) responsible for resistance appear to have come from NP 4 and Turkey, both of which seem to have evolved simultaneously in nature. The gene(s) for susceptibility in NP 830 and NP 891 were found to be different. It is assumed that these genes come from either Motia (Triticum durum) or Khapli (T. dicoccum) in NP 830 and from Gaza (T. durum) in NP 891.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00041617
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