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  • 1
    Electronic Resource
    Electronic Resource
    Predictive correlates of shoot regeneration from potato protoplast culture (1996)
    Springer
    Plant cell reports 15 (1996), S. 350-354 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Adaptation of protoplast regeneration systems for use on untested or recalcitrant potato genotypes can be a time-consuming exercise. Callus growth and xylogenesis were evaluated as early correlates of shooting potential to shorten this process. Callus growth was of limited value for predicting organogenesis but a linear relationship was observed between xylogenesis and shooting frequency. Increases in xylem content above a minimum threshold corresponded with increases in shooting frequency. The predictive value of the relationship was tested using a simple protocol modification (the culture of calli on a filter paper base). Calli on filter paper produced more xylem elements and shoots than those plated directly on medium. The potential of xylem content as a predictive test of shooting frequency is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232370
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evidence that genes from the male parent may influence the morphology of potato dihaploids (1997)
    Springer
    Theoretical and applied genetics 94 (1997), S. 241-248 
    Details
    ISSN: 1432-2242
    Keywords: Key words Potato dihaploids ; Principal component analysis ; Dihaploid induction ; Microsatellite ; Isozyme analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A number of recent studies have provided evidence that potato dihaploids (S. tuberosum) contain and express DNA from the male (dihaploid inducer) parent, S. phureja. The importance of this for breeding programmes that use dihaploid potatoes is to some extent dependent upon whether the S. phureja DNA influences dihaploid morphology. In the present study, 21 characters were used to compare the morphology of six dihaploids with those of their parents: S. tuberosum (cvs `Pentland Dell' and `Pentland Crown') and S. phureja (IVP48). Characteristics of S. phureja were found in all of the dihaploids examined. In principal component analyses, dihaploids formed intermediate groupings positioned between those of the parents, although much closer to S. tuberosum. It is concluded there is evidence that DNA originating from the dihaploid inducer can affect the morphology of potato dihaploids. Implications of the findings are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050406
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    Paper (German National Licenses)
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