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  • Acetylene reduction  (1)
  • Key words In vitro regeneration  (1)
  • Springer  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Heritability estimates for callus growth and regeneration in desmodium (1996)
    Springer
    Theoretical and applied genetics 93 (1996), S. 568-573 
    Details
    ISSN: 1432-2242
    Keywords: Key words In vitro regeneration ; Heritability ; Forage legumes ; Censored data sets ; Desmodium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The F2 and F3 generations of two crosses (6123×13083 and 6123×144, with 6123 the regenerating parent) were evaluated for callus growth and regeneration capacity. Based on joint scaling tests and variance partitioning, neither callus growth nor regeneration fitted a simple additive-dominant genetic model. Heritability estimates obtained from parent-offspring regression analyses ranged from 0.65 to 0.77 for callus growth and from 0.19 to 0.46 for regeneration, with the range in both influenced by the cross and numerical scale employed. Members of two F3 families exhibited much more vigorous and prolific regeneration than the regenerating parental genotype. Because many individuals in the segregating generations showed no evidence of regeneration, population distributions for this trait were severely truncated, or censored. Regression-order analysis was used to estimate means and variances of these censored populations. The association between poor callus growth and high regeneration capacity observed in the parental lines was absent from the F2 and F3 generations, indicating that no association between callus growth and regeneration was present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050316
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  • 2
    Electronic Resource
    Electronic Resource
    Growth and nitrogen fixation ofAeschynomene under water stressed conditions (1981)
    Springer
    Plant and soil 60 (1981), S. 309-315 
    Details
    ISSN: 1573-5036
    Keywords: Acetylene reduction ; Aeschynomene americana ; Flooding ; Leaf water potential ; Nitrogen fixation ; Soil moisture deficits
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Studies on the tolerance ofAeschynomene americana L. to periods of flooding or soil moisture deficit were conducted in an attempt to elucidate nitrogen fixation as affected by soil moisture. Nitrogenase activity was not reduced significantly in pot-grown Aeschynomene plants subjected to flooding in greenhouse conditions. After 20 days of withholding water from the soil, nitrogenase activities of the drought-stressed plants were much lower than those of either the well-watered or flooded plants. Leaf water potentials were similar in flooded and control plants; however, the droughted plants had leaf water potentials that were 4 bars lower than those of the control plants. Aeschynomene plants were tolerant to long-term periods of flooding, but exhibited a reduction in nitrogenase activity and leaf water status when subjected to soil moisture deficits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374115
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    Paper (German National Licenses)
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