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  • Wheat  (108)
  • Triticum aestivum  (105)
  • Springer  (195)
  • Elsevier
  • Institute of Physics
  • Wiley
  • 1980-1984  (195)
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Schlagwörter
Verlag/Herausgeber
  • Springer  (195)
  • Elsevier
  • Institute of Physics
  • Wiley
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Nitrate reductase activity (in vivo and in vitro) of ditelosomic stocks of wheat (Triticum aestivum L.) (1981)
    Springer
    Biochemical genetics 19 (1981), S. 263-276 
    Details
    ISSN: 1573-4927
    Schlagwort(e): nitrate reductase ; Triticum aestivum ; ditelosomics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract The nitrate reductase activities (NRA) of 31 ditelosomic stocks were compared with that of the control plant [Chinese Spring (CS) euploid], using in vivo and in vitro assay procedures that had been optimized with respect to the euploid. Fourteen stocks exhibited significant differences in in vivo NRA from that of the euploid; the effect of removal of a chromosome arm was always to increase NRA. Eight of these stocks showed similar effects in vitro, although in three, a casein-sensitive factor had to be eliminated before the difference was expressed. Homoeologous group effects were evident among ditelosomics of groups 2, 4, and 7, while for three chromosomes (2D, 7A, and 7B), removal of either arm resulted in a similar increase in NRA in vivo and probably in vitro.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00504273
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  • 2
    Digitale Medien
    Digitale Medien
    The use of irradiated pollen for differential gene transfer in wheat (Triticum aestivum) (1983)
    Springer
    Theoretical and applied genetics 65 (1983), S. 103-111 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Pollen irradiation ; Wheat ; Differential gene transfer
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The use of irradiated pollen to bring about limited gene transfer in wheat has been investigated. Doses of X-rays of 2Kr, 3Kr and 5Kr were used to generate M1 progeny between maternal and paternal genotypes differing in quantitative and major gene characters. Cytological studies of M1 plants revealed hybrids with widespread aneuploidy and structural rearrangements in the paternal genome. These effects resulted in phenotypic variation between M1 progeny and complex multivalent formation at meiosis. All M1 plants at the 5Kr and 3Kr doses were sterile and all but 2 plants at the 2Kr dose. Studies of the two M2 families from these plants revealed disturbances in genotype frequencies for some of the marker loci with an excess of maternal homozygotes and a deficit of paternal homozygotes. This was also reflected in a more maternal appearance for quantitative characters. These results are interpreted as showing that irradiation damage to the paternal genome in M1 plants results in the differential transmission of maternal alleles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00264875
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  • 3
    Digitale Medien
    Digitale Medien
    Chitinase as a possible resistance factor for higher plants (1983)
    Springer
    Theoretical and applied genetics 65 (1983), S. 171-172 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Resistance ; Genetic engineering ; Yellow rust ; Wheat ; Chitinase
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Virulence and resistance may act on the same biochemical mechanisms. Because Erwinia-virulence on potato depends on the lysis of cell walls of the host, resistance may depend on the lysis of cell walls of the parasite. An example is given with yellow rust on wheat.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00264887
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  • 4
    Digitale Medien
    Digitale Medien
    The response of anther culture to culture temperature in Triticum aestivum (1983)
    Springer
    Theoretical and applied genetics 66 (1983), S. 101-109 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Anther culture ; Culture temperature ; Induction frequency ; Pollen callus (plantlet) ; Triticum aestivum
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The response of anther culture to culture temperature was studied in detail using many varieties, F1 hybrids and pollen-derived lines of wheat (Triticum aestivum) as materials. The suitable culture temperature for inducing pollen callus (or embryoids) in wheat anther culture ranged from 26 °C to 30 °C, varying with genotypes. But for the great majority of wheat genotypes the suitable culture temperatures lay between 28 °C and 30°C. The most significant genotypic variation in the response to culture temperature was observed in the comparison between the culture at 33 °C for eight days followed by culture at 25 °C (or 26 °C) and the continuous culture at 25 °C (or 26 °C). This genotypic variation in the response to culture temperature is a heritable character which may be controlled by multiple genes. The effect of culture at 30 °C for eight days followed by culture at 26 °C was similar to, or in some cases, better than that of continuous culture at 28 °C, and the effect of culture at 32 °C for eight days followed by culture at 28 °C was similar to that of continuous culture at 30 °C. In the range from 26 °C to 32 °C, the overwhelming majority of pollen calli emerged before the 40th day after anther inoculation, and the higher the culture temperature, the earlier and more concentrated the emerging period of the pollen callus. The pollen callus obtained at high temperatures above 28 °C should be transferred in time onto the regeneration medium at 25°–27°C to induce shoots.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00265182
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  • 5
    Digitale Medien
    Digitale Medien
    The Tom Thumb dwarfing gene Rht3 in wheat (1983)
    Springer
    Theoretical and applied genetics 66 (1983), S. 249-256 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Wheat ; Dwarfism ; Yield ; Quality
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The effects of the ‘Tom Thumb’ Rht3 dwarfing gene in wheat on plant height, yield components and grain quality in field trials of random inbred lines from two ‘Minister Dwarf’ (Rht3) x rht3 crosses are described. Limited genetic increases in Rht3 plant height, up to 70 cm, were achieved by incorporating genes from the extremely tall variety ‘April Bearded’. Amongst lines from the higher yielding cross, the dwarfing gene did not reduce grain yield but was associated with an increase in grain number of over 25%. Although Rht3 reduced grain protein content by up to 0.8%, breadmaking quality, as measured by SDS sedimentation values and baking tests, was not affected. A controlled environment experiment with near-isogenic Rht3 and rht3 lines indicated that reduced grain size in the dwarfs is a competitive response to the increase in fertility rather than a primary effect of the dwarfing gene.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00251155
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  • 6
    Digitale Medien
    Digitale Medien
    The chromosomal location of malate dehydrogenase isozymes in hexaploid wheat (Triticum aestivum L.) (1983)
    Springer
    Theoretical and applied genetics 64 (1983), S. 255-258 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Triticum aestivum ; Wheat ; Malate dehydrogenase ; Chromosomal location
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The malate dehydrogenase (E.C. no 1.1.1. 37) of Triticum aestivum L. cv. Chinese Spring, shows two activity zones. The results obtained support the hypothesis that the malate dehydrogenase isozymes of zone II are dimers composed of the six possible combinations of subunits coded by triplicate genes located in the long arms of chromosomes of the homoeologous group 1.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00303774
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  • 7
    Digitale Medien
    Digitale Medien
    Chromosome variation in wheat plants regenerated from cultured immature embryos (1984)
    Springer
    Theoretical and applied genetics 67 (1984), S. 249-255 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Wheat ; Plant regeneration ; Chromosome variation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary A cytological study has been made of plants regenerated from cultured immature embryos of four wheat cultivars (Triticum aestivum, 2n = 6x = 42). In total, 29% of the 192 plants examined were aneuploid with a range in chromosome numbers of 38–45. Evidence of chromosome structural changes was also found. This variation occurred in regenerants of all four cultivars, but there were large differences in the proportions of aneuploids arising from individual cultures which meant that no significant differences could be demonstrated between cultivars. Chromosome abnormalities were present in plants regenerated both from embryogenic cultures and from cultures in which the origin of shoots could not be distinctly defined.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00317047
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  • 8
    Digitale Medien
    Digitale Medien
    Wheat microspore embryogenesis during in vitro anther culture (1984)
    Springer
    Theoretical and applied genetics 67 (1984), S. 439-442 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Wheat ; Multicellular pollen grains ; Embryos ; Cytology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Cytological analysis of microspore embryogenesis during in vitro culture reveals a high mortality in the first week and a latency phase of about one week before the first embryogénic mitosis. Genotypic differences observed during our wheat anther culture do not seem to originate at the induction level but are linked to the different abortion rates.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00263409
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  • 9
    Digitale Medien
    Digitale Medien
    The regeneration of plants from frozen pollen embryos and zygotic embryos of wheat and rice (1984)
    Springer
    Theoretical and applied genetics 67 (1984), S. 525-528 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Cryopreservation ; Embryo culture ; Haploids ; Wheat ; Rice ; Germplasm bank
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Anther culture derived pollen embryos and immature zygotic embryos of wheat and rice, frozen in liquid nitrogen in the presence of dimethyl sulfoxide, sucrose and glycerol, have been revived. The retrieved cultures proliferated and/or regenerated shoots and plantlets. The prospects of the cryopreservation of embryos for the conservation and multiplication of germplasm and the possibility of the establishment of ‘Germplasm Banks’ are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00264898
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  • 10
    Digitale Medien
    Digitale Medien
    The genetic control of grain esterases in hexaploid wheat (1984)
    Springer
    Theoretical and applied genetics 68 (1984), S. 219-226 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Hexaploid genotypes ; Allelic variation ; Esterase ; Isozymes ; Isoelectric focusing ; Wheat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Analysis of grain esterase isozymes in Chinese Spring aneuploid genotypes by IEF confirmed that genes on the long arms of chromosomes 3A, 3B and 3D (Est-5) control the production of 19 isozymes. Allelic variants have been found for the isozyme pattern controlled by each chromosome. Segregational data involving null alleles and complex phenotypic differences indicate that the wheat grain esterases are encoded by three compound and probably homoeoallelic loci, each capable of producing at least six different isozymes. In a sample of 138 hexaploid genotypes, seven alleles were distinguished.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00266893
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