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  • Articles  (7)
  • Analytical Chemistry and Spectroscopy
  • Biochemistry and Biotechnology
  • Brassica napus
  • General Chemistry
  • Inorganic Chemistry
  • Life and Medical Sciences
  • Springer  (7)
  • 1985-1989  (7)
  • 1955-1959
  • 1986  (7)
Collection
  • Articles  (7)
Source
Keywords
Publisher
Years
  • 1985-1989  (7)
  • 1955-1959
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Cytoplasmic male sterility in rapeseed (Brassica napus L.) (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 145-150 
    Details
    ISSN: 1432-2242
    Keywords: Brassica napus ; Cytoplasmic male sterility ; Chloroplast DNA ; Mitochondrial DNA ; Restriction patterns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Restriction patterns of chloroplast (cp) and mitochondrial (mt) DNA in Brassica napus rapeseed reveal the alloplasmic nature of cytoplasmic male sterility in this crop. Both the Shiga and Bronowski systems probably exploit cytoplasmic diversity in B. napus cultivars arising from introgression of cytoplasm from the other rapeseed species, B. campestris. Nuclear genes specific to these systems do not cause sterility in maintainers (Bronowski and Isuzu-natane) because they have a campestris cytoplasm, but give rise to sterility in napus cytoplasms. In the course of hybridization to napus cultivars a line with the triazine resistant cytoplasm (a campestris cytoplasm) has undergone an alteration in the mt genome rendering its restriction pattern more similar than previously to that of napus. The alteration may be an inversion between 7.2 and 3.4 kb in length.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266985
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  • 2
    Electronic Resource
    Electronic Resource
    Mapping the chloroplast genome of triazine resistant canola (1986)
    Springer
    Theoretical and applied genetics 71 (1986), S. 716-723 
    Details
    ISSN: 1432-2242
    Keywords: Chloroplast DNA map ; Brassica napus ; Triazine resistance ; Canola
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The chloroplast of a triazine resistant weed biotype of Brassica campestris (bird's rape) has been transferred by repeated back-crossing into an agriculturally important strain, ‘Tower’, of Brassica napus to form a triazine resistant cultivar of canola, ‘Triton’, that is low in both erucic acid and thioglucosinolate. In this report, the B. campestris derived chloroplast chromosome of B. napus (cv ‘Triton’) has been cloned into bacterial plasmids and physically mapped for eight restriction enzymes: Apa I, Bam HI, BglI, Hind III, Pst I, Pvu II, Sac I and Xho I. The genes for rRNA, rbcL, cytF, atpA, atpB, atpE, atpH and the triazine resistance gene, psbA were located on the map by heterologous hybridization. The directions of transcription for most of these genes were determined by reverse heterologous hybridization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263269
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  • 3
    Electronic Resource
    Electronic Resource
    Cytoplasmic male sterility in rapeseed (Brassica napus L.) (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 151-157 
    Details
    ISSN: 1432-2242
    Keywords: Brassica napus ; Cytoplasmic male sterility ; Mitochondrial DNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The linear mitochondrial (mt) plasmid in rapeseed occurs in normal, fertile plants, cytoplasmic male sterile (cms) lines (sterile and restored) and maintainers. To determine the role of plasmid genes in cytoplasmic male sterility the three internal Hind III fragments (78%) of the 11.3 kb plasmid were cloned, nick-translated and hybridized to electrophoretic blots of Pst I digests of chloroplast (cp) and mt DNA from normal and cms lines. There is no homology between plasmid DNA and the cp and mt genomes in any line examined nor do plasmid sequences appear to be directly involved in certain alterations of the mt genome. As well, loss of the free plasmid is not associated with integration of the plasmid DNA into the cp or mt genomes. Finally, plasmid copy number appears to be affected by nuclear genotype.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266986
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  • 4
    Electronic Resource
    Electronic Resource
    Selection for fast germination in rapeseed (Brassica napus L. and B. Campestris L.) (1986)
    Springer
    Euphytica 35 (1986), S. 835-842 
    Details
    ISSN: 1573-5060
    Keywords: Brassica napus ; Brassica campestris ; rapeseed ; temperature effects ; germination ; germination selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Eleven populations of Brassica napus L. and twelve populations of B. campestris L. were subjected to three cycles of selection for fast germination at 2°C and at 25°C. The seeds from the selected populations, and unselected control populations grown in the same environment as the selected populations, were examined for germination behaviour at 2°C and 25°C, and for growth behaviour at 10°C. The populations in both species responded differently in terms of germination behaviour to selection for fast germination. In most of the populations that did respond positively to selection, selection practised at 2°C was superior to selection at 25°C in improving percent germination at 2°C, and was as good as the selection at 25°C in improving germination rate at the higher temperature. Selection for fast germination had no effect on growth characteristics of B. napus and B. campestris populations grown at 10°C. Thus, selection for fast germination at one low temperature may lead to improvement in germination characteristics over a range of temperatures, but will not necessarily lead to improved growth performance of the selected populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028591
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  • 5
    Electronic Resource
    Electronic Resource
    Interspecific hybridization of Brassica napus and B. juncea through ovary, ovule and embryo culture (1986)
    Springer
    Euphytica 35 (1986), S. 103-109 
    Details
    ISSN: 1573-5060
    Keywords: Brassica ; Brassica napus ; Brassica juncea ; oilseed crops ; tissue culture ; interspecific hybridization ; genetic variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Employing in vitro culture of ovaries, ovules and embryos, interspecific hybrids have been obtained amongst two important oilseed crops, Brassica napus x B. juncea and their reciprocal. The test-tube hybrid plants have been transferred to the field, and reared to maturity. The F1 seeds obtained from the hybrid ovaries showed normal germination, and the hybrid plants exhibited a range of variation of characters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028547
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of temperature on parameters of root growth relevant to nutrient uptake: Measurements on oilseed rape and barley grown in flowing nutrient solution (1986)
    Springer
    Plant and soil 94 (1986), S. 321-332 
    Details
    ISSN: 1573-5036
    Keywords: Brassica napus ; Flowing solution culture ; Growth models ; Hordeum vulgare ; Root growth ; Root hair ; Root length ; Root temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Effects of root temperature on the growth and morphology of roots were measured in oilseed rape (Brassica napus L.) and barley (Hordeum vulgare L.). Plants were grown in flowing solution culture and acclimatized over several weeks to a root temperature of 5°C prior to treatment at a range of root temperatures between 3 and 25°C, with common shoot temperature. Root temperature affected root extension, mean radius, root surface area, numbers and lengths of root hairs. Total root length of rape plants increased with temperature over the range 3–9°C, but was constant at higher temperatures. Root length of barley increased with temperature in the range 3–25°C, by a factor of 27 after 20 days. Root radii had a lognormal distribution and their means decreased with increasing temperature from 0.14 mm at 3°C to 0.08 mm at 25°C. The density of root hairs on the root surface increased by a factor of 4 in rape between 3 and 25°C, but in barley the highest density was at 9°C. The contribution of root hairs to total root surface area was relatively greater in rape than in barley. The changes in root system morphology may be interpreted as adaptive responses to temperature stress on nutrient uptake, providing greater surface area for absorption per unit root weight or length.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374326
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of plant density on yield of homozygous and heterozygous winter rapeseed (Brassica napus L.) (1986)
    Springer
    Euphytica 35 (1986), S. 823-834 
    Details
    ISSN: 1573-5060
    Keywords: Brassica napus ; rape ; heterosis ; sowing density ; physiological correlations ; homozygotes-heterozygotes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Plot yields and both environmental correlations and variances of various morphological and yield characters were compared at different plant densities of lines and F1 hybrids in rapeseed over a two-year period. These variances and correlations were measured on single plant basis and are independent of the genotype: they may partly reflect physiological relations between characters. At intermediate or low density, results indicate no significant heterogeneity for behaviour of both homozygotes and heterozygotes, with some lower correlations at very low densities. At high density hybrid vigour is significantly higher than at low or intermediate density. In heterozygotes, it is associated with reinforced correlations between morphological and yield criteria. The results are discussed with regard to seed yield elaboration, to heterosis and possible homeostasis of hybrids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028590
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