ISSN:
1615-6110
Keywords:
Asteraceae
;
Lactuca saligna
;
L. sativa
;
L. serriola
;
L. virosa
;
Morphological characteristics
;
numerical taxonomy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract 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 component analysis) distinguished four groups corresponding with the four species. Infraspecific variation (e.g., colour, leaf shape) withinL. sativa is the largest, because breeding has caused a large variation in vegetative features; infraspecific variation withinL. serriola is also large. Three plants of one accession were placed betweenL. sativa andL. serriola because they showed morphological characteristics of both species. They are still classified asL. sativa. The morphological differences betweenL. sativa andL. serriola are too large to consider these two as one species. The descent of the cultivar groups and the four species is described.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00983546
