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  1. No Access

    Article

    Origin and domestication of Lactuca sativa L.

    The domestication of lettuce, Lactuca sativa L. is described on the basis of literature study. The centre of origin is discussed. A historical survey is made of the distribution of the groups of Lactuca cultiv...

    I.M. de Vries in Genetic Resources and Crop Evolution (1997)

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    Article

    Characterization and identification of Lactuca sativa cultivars and wild relatives with SDS-electrophoresis (Lactuca sect. Lactuca, Compositae)

    Patterns of achene proteins of L. sativa cultivars are mutually compared and compared with L. saligna, L. serriola and L. virosa. L. virosa and L. saligna are easy to identify and are characterized by typical ban...

    I. M. de Vries in Genetic Resources and Crop Evolution (1996)

  3. No Access

    Article

    Numerical morphological analysis of Lettuce cultivars and species (Lactuca sect.Lactuca, Asteraceae)

    L. sativa L. cultivars were compared morphologically with accessions ofL. saligna L.,L. serriola L., andL. virosa L. in order to define the infra- and interspecific variation. Multivariate analysis (principal co...

    I. M. de Vries, L. W. D. van Raamsdonk in Plant Systematics and Evolution (1994)

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    Article

    Chromosome banding patterns in Lettuce species (Lactuca sect.Lactuca, Compositae)

    Chromosome banding patterns obtained with C- and N- banding, and AgNO3 staining were studied in somatic metaphase complements of fourLactuca species.L. sativa andL. serriola have almost identical chromosome morph...

    W. J. M. Koopman, J. H. De Jong, I. M. De Vries in Plant Systematics and Evolution (1993)

  5. No Access

    Article

    Crossing experiments of lettuce cultivars and species (Lactuca sect.Lactuca, Compositae)

    The degree of relationships withinLactuca sativa and three wild relativesL. serriola, L. saligna, andL. virosa was studied by observing the performance, vigour and fertility of the F 1 hybrids obtained from cross...

    I. M. de Vries in Plant Systematics and Evolution (1990)