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  • 1
    Electronic Resource
    Electronic Resource
    Population means and correlation analyses of growth parameters in lisianthus (Eustoma grandiflorum Shinn.) (1994)
    Springer
    Euphytica 78 (1994), S. 193-197 
    Details
    ISSN: 1573-5060
    Keywords: Eustoma grandiflorum ; flowering date ; genetics ; heterosis ; lisianthus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The variation in growth characteristics among lisianthus (Eustoma grandiflorum Shinn.) genotypes was investigated. The genetic control of several growth parameters was studied by analysing parental, F1, BC1 and F2 populations. The parameters analysed were stem elongation rate (SE), stem diameter (SD), leaf width (LW), number of nodes (NN), node length (NL) and days to flowering (DF). The genotypes tested exhibited great variation for all parameters. A particularly wide variation was noted for SE, ranging from 3 to 56 mm/week. This variation was partially attributed to a differential sensitivity to rosette formation. There was a marked positive heterosis for SE, SD, LW and NN; these parameters proved to be genetically correlated within segregating populations. DF was slightly negatively correlated with SE, NN and NL. It was concluded that SE and DF were independently controlled.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027517
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  • 2
    Electronic Resource
    Electronic Resource
    The genetic relations between length of time to germination and seed dormancy in lisianthus (Eustoma grandiflorum) (1994)
    Springer
    Euphytica 80 (1994), S. 125-128 
    Details
    ISSN: 1573-5060
    Keywords: chill ; Eustoma grandiflorum ; genetics ; germination speed ; seed dormancy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The inheritance of speed of germination and its genetic relations with seed dormancy was investigated in lisianthus (Eustoma grandiflorum). The study was based on data from parental, F1, BC1F1 and F2 generations of a cross between a normally germinating genotype (P1) and a chill-requiring genotype (P2). The mean post-chilling germination speed of P2 was considerably lower than that of P1. Germination speed was found to be under nuclear embryonic control. Analysis of generation means for prechilled seeds revealed an additive gene action with complete dominance of the alleles conferring higher germination speed, since the means of the F1 and the BC1 (P1) were indentical to that of P1. Such dominance was not found for unchilled seeds, in which the mean germination speed of the F1 and the BC1 (P1) was lower than that of P1. It was hypothesized that slow germination speed was induced by pleiotropic effects of seed dormancy alleles. Seed prechilling seemed to eliminate these effects in progeny heterozygous for dormancy alleles, but not in progeny homozygous for dormancy alleles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039307
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