Abstract
Crossing experiments were carried out between the three cytotypes (2n = 24, 2n = 40 and 2n = 48) of Symphytum officinale and that of Symphytum asperum (2n = 32). The results indicate that morphologically closely related types are sometimes crossable, whereas in other cases no hybrids could be produced. On the other hand morphologically very distinct types could be crossed with great ease. The significance of these studies for the elucidation of taxonomic problems is discussed.
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Claims 3
Claim · model-written summary
Some morphologically close Symphytum types were crossable.
- Taxon
- Symphytum officinale
Symphytum officinalee0 - Outcome
- morphologically closely related types are sometimes crossablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“between the three cytotypes (2n = 24, 2n = 40 and 2n = 48) of Symphytum officinale and that of Symphytum asperum (2n = 32). The results indicate that morphologically closely related types are sometimes crossable”
Claim · model-written summary
Other morphologically close Symphytum types did not yield hybrids.
- Taxon
- Symphytum officinaleSymphytum officinalee0
- Outcome
- no hybrids could be producede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“between the three cytotypes (2n = 24, 2n = 40 and 2n = 48) of Symphytum officinale and that of Symphytum asperum (2n = 32). The results indicate that morphologically closely related types are sometimes crossable, whereas in other cases no hybrids could be produced”
Claim · model-written summary
Morphologically distinct Symphytum types crossed easily.
- Taxon
- Symphytum asperum
Symphytum asperume0 - Outcome
- morphologically very distinct types could be crossed with great easee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Symphytum officinale and that of Symphytum asperum (2n = 32). The results indicate that morphologically closely related types are sometimes crossable, whereas in other cases no hybrids could be produced. On the other hand morphologically very distinct types could be crossed with great ease”