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  • Electronic Resource  (9)
  • 1975-1979  (9)
  • Brassica napus
  • somatic hybridization
  • 1
    Electronic Resource
    Electronic Resource
    The possibility of predicting solute uptake and plant growth response from independently measured soil and plant characteristics (1979)
    Springer
    Plant and soil 53 (1979), S. 169-191 
    Details
    ISSN: 1573-5036
    Keywords: Brassica napus ; Growth analysis ; NO3 uptake rates ; Sensitivity analysis ; Soil solution ; Uptake simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Rape plants were grown in a constant environment for 24 days in a sandy loam soil initially at soil solution nitrate concentrations of 1.54×10−2 M and 3.72×10−3 M. Nutrients other than nitrate were maintained at adequate levels. The growth and nitrate uptake were followed by successive harvests of replicate plants. The dry weights and N contents of plants were compared with those predicted by the model in Paper I of this series8, based on parameters of solution cultured plants. Similar environmental conditions were reproduced for these soil culture experiments and soil characteristics were measured separately. The predicted and observed N contents agreed well over the entire growth period. The dry weights were predicted accurately for 15 days in both cases, but were overestimated when extrapolated beyond the range of the model. The dry weight and N content were most sensitive to the relative growth rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181889
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. oleracea ssp. capitata). III. First backcross and F2 progenies from interspecific hybrids between B. napus and B. oleracea ssp. capitata (1979)
    Springer
    Euphytica 28 (1979), S. 257-266 
    Details
    ISSN: 1573-5060
    Keywords: Crucifers ; Brassica napus ; Brassica oleracea ssp. capitaca ; cabbage ; Plasmodiophora brassicae ; clubroot disease ; fungal resistance ; interspecific cross ; resistance breeding ; chromosome numbers ; meiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The first backcross and F2 progenies from triploid F1 and tetraploid F1 hybrids between B. napus and 2x and 4x B. oleracea ssp. capitata (cabbage) were studied for their general morphology, resistance to race 2 of the clubroot pathogen, chromosome number and meiotic chromosome behavior. No linkage was apparent between resistance and the major morphological characters. Unreduced gametes played a large part in the successful formation of seed of the B1 and F2 progeny. B1 plants with low chromosome numbers were selected for use in recurrent backcrosses. The potential use of anther culture to extract gametic progenies from resistant B1 and F2 plants with higher chromosome numbers was suggested. The presence of homoeologous pairing observed in all the plants is considered advantageous for selecting suitable progeny in later generations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00056583
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The possibility of predicting solute uptake and plant growth response from independently measured soil and plant characteristics (1979)
    Springer
    Plant and soil 53 (1979), S. 137-167 
    Details
    ISSN: 1573-5036
    Keywords: Brassica napus ; Growth analysis ; NO3 uptake rates ; Ontogenetic effects ; Root demand coefficient ; Root hairs ; Solution culture ; Shoot: root ratios ; Tissue N concentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The growth and nitrogen uptake response of rape plants to nitrate concentration at the root surface were studied in solution culture in a controlled environment cabinet over a period of 24 days. NO3 − was supplied at the rates of 10−5 M, 5×10−5 M, 10−4 M, 10−3 M and 10−2 M in solution and was maintained near these levels. With increasing mean N concentration in the tissues, the relative growth rate and leaf area ratio increased and unit leaf rate decreased slightly. Values of all three growth parameters decreased with plant age. The shoot: root dry weight ratios and their N content ratios increased with increasing mean per cent N in the plant. The length or surface area per unit dry weight of roots was correlated negatively with per cent N and positively with age. The maximum mean inflow of nitrate to rape roots decreased sharply with age. The concentration at which half maximal mean inflow was attained was 3.44×10−5 M NO3 −.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181888
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  • 4
    Electronic Resource
    Electronic Resource
    The possibility of predicting solute uptake and plant growth response from independently measured soil and plant characteristics (1979)
    Springer
    Plant and soil 53 (1979), S. 193-201 
    Details
    ISSN: 1573-5036
    Keywords: Brassica napus ; Growth analysis ; NO3 uptake rates ; Root length ratio ; Solutionversus soil solution ; Uptake analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The growth and nitrate uptake characteristics of rape plants grown in soil at initial NO3 − concentrations of 1.54×10−2 M and 3.72×10−3 M are compared with those observed in solution culture at 10−2 M and 10−3 M. The relative growth rates and total nitrogen concentration of the soil grown plants were similar to those observed in solution culture. This suggests a remarkable capacity of the plant to regulate the size and efficiency of the photosynthetic and uptake machineries. Variations in the unit leaf rate or nitrate inflow in response to the environment or the internal nutrient status are counterbalanced by variations in the leaf area ratio or in ‘root length ratio’ so as to maintain a similar course of growth. The shoot: root ratios and the root length per unit dry weight varied within similar ranges in soil and solution. The soil grown plants accumulated N preferentially in shoots compared with those grown in solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181890
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  • 5
    Electronic Resource
    Electronic Resource
    Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. oleracea var. capitata). II. Meiosis in the interspecific hybrids between B. napus and 2x and 4x cabbage (1978)
    Springer
    Euphytica 27 (1978), S. 81-93 
    Details
    ISSN: 1573-5060
    Keywords: Brassica oleracea var. capitata ; cabbage ; Brassica napus ; rape ; colza ; crucifers ; Plasmodiophora brassicae ; clubroot disease ; fungal resistance hybrids ; meiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Meiosis in 14 interspecific F1 hybrids with three chromosomal levels (triploid, tetraploid, hexaploid; 2n=28, 37 and 55) between Brassica napus L. and 2x and 4x cabbage (B. oleracea var. capitata L.) was studied. The oleracea genome from B. napus maintained close homology with the c genome of cabbage while the campestris genome of B. napus showed partial homology with the c genome contained in the hybrids. Genotypic influence on chromosome pairing was indicated. Structural chromosome differences and spontaneous chromosome breakage and reunion were suggested as causes for the abnormalities which related to the unbalance of the genotypes. The divergence of the genomes of B. napus and B. oleracea and the need for the qualification of the term secondary association were discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039122
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  • 6
    Electronic Resource
    Electronic Resource
    A genetic study of growth characters and yield characters of oilseed rape (1978)
    Springer
    Euphytica 27 (1978), S. 177-183 
    Details
    ISSN: 1573-5060
    Keywords: Brassica napus ; oilseed rape ; yield ; yield components ; growth pattern ; inheritance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Analysis of single plants in parental, F1 and F2 populations of three crosses of oilseed rape indicated cytoplasmic effects in F1 or F2 generations for most of the observed characters. There was evidence of dominance for early flowering and early maturity. Heterosis was exhibited for yield and yield components. The heritabilities for the characters under study were generally very low.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039133
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  • 7
    Electronic Resource
    Electronic Resource
    A study on disease variation in the populations of an interspecific cross of Brassica juncea L. x B. napus L. (1978)
    Springer
    Euphytica 27 (1978), S. 145-149 
    Details
    ISSN: 1573-5060
    Keywords: Brassica juncea ; Brassica napus ; interspecific cross ; seedling/adult resistance ; diseases of rapes ; Leptosphaeria maculans ; blackleg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary F1 behaviour and F2 variation in disease reaction were studied in the interspecific cross Brassica juncea x B. napus. Gene(s) for adult resistance to blackleg (Leptosphaeria maculans) were found to be present in the A genome of B. juncea and could be transferred to B. napus. Gene(s) for complete (seedling plus adult) resistance in B. juncea appeared to be located in the B genome. The chance of their transfer to the oilseed rapes (B. napus or B. campestris) would therefore seem to be remote.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039129
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  • 8
    Electronic Resource
    Electronic Resource
    The introgression of S alleles into forage rape, Brassica napus L. from turnip. Brassica campestris L. ssp. Rapifera (1977)
    Springer
    Euphytica 26 (1977), S. 511-519 
    Details
    ISSN: 1573-5060
    Keywords: Brassica napus ; rape ; Brassica campestris ; turnip ; introgression ; S incompatibility alleles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Forage rape. B. napus, is self-compatible, the work described illustrates the introgression of functional incompatibility alleles into B. napus from turnips, B. campestris, in two generations. By grading seed, produced by backcrossing turnip/rape hybrids to rape, the frequency of 2n=38 ‘semi articial’ B. napus recovered, amply justifies the cytological screening involved in such breeding programmes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027020
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  • 9
    Electronic Resource
    Electronic Resource
    Transfer of resistance to race 2 of Plasmodiophora Brassicae from Brassica napus to cabbage (B. oleracea var. Capitata). I. Interspecific hybridization between B. napus and B. oleracea var. Capitata (1977)
    Springer
    Euphytica 26 (1977), S. 319-336 
    Details
    ISSN: 1573-5060
    Keywords: Crucifers ; Brassica napus ; Brassica oleracea ssp. capitata ; cabbage ; Plasmodiophora brassicae ; clubroot disease ; fungal resistance ; interspecific cross ; resistance breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Interspecific hybridization between Brassica napus L. (2n=38, a1a1c1c1) and B. oleracea var. capitata L. (2x- and 4x-cabbage; 2n=2x=18, cc and 2n=4x=36, cccc) was carried out for the purpose of transferring clubroot disease resistance from the amphidiploid species to cabbage. Nineteen hybrids with three different chromosome levels (2n=28, a1c1c; 2n=37, a1c1cc and 2n=55, a1c1cccc) were obtained. The F1 plants were mostly intermediate between the two parents but as the number of ‘c’ genomes in the hybrids increased, the more closely the hybrids resembled the cabbage parent. All F1 hybrids were resistant when tested against race 2 of Plasmodiophora brassicae wor. The complete dominance of resistance over susceptibility suggested that the gene(s) controlling resistance to this particular race of the clubroot pathogen is probably located on a chromosome of the ‘a’ genome in Brassica.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026993
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