Abstract
The authors report the chromosome numbers of 25 taxa of the genus Solidago which had not yet been studied from this standpoint, and review the literature. The chromosome numbers of 42 taxa have now been published. The basic number of the genus is nine. Thirty-three taxa are diploid (2n = 18), five are tetraploid (2n = 36), three are aggregate taxa containing both diploid and tetraploid cytodemes, and one is hexaploid (2n = 54). Polyploidy has thus contributed to the evolution of the genus Solidago but it seems that most of the species have differentiated gradually. S. decemflora DC. of western North America differs from S. nemoralis Ait. of the same continent by morphological characters, its geographical distribution, and its chromosome number, the first taxon being tetraploid and the second diploid; the two are thus good species and not only varieties of the same species. The S. rigida of authors is an aggregate made up of two entities which are distinguished not only by their morphology and geographical distribution but also by their chromosome numbers; the eastern one (S. rigida L.) is tetraploid, whereas the western one (S. parvirigida Beaudry) is diploid. The bog and marsh goldenrods, S. Purshii and S. uliginosa, also possess different chromosome numbers, the first being diploid and the second tetraploid.
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Claims 16
Claim · model-written summary
Chromosome numbers were reported for 25 previously unstudied Solidago taxa.
SolidagoOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chromosome numbers of 25 taxa of the genus Solidago which had not yet been studied”
Claim · model-written summary
Chromosome numbers have been published for 42 Solidago taxa.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosome numbers of 42 taxa have now been published.”
t0“GENUS SOLIDAGO”
Claim · model-written summary
The basic Solidago chromosome number is nine.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The basic number of the genus is nine.”
t0“GENUS SOLIDAGO”
Claim · model-written summary
Thirty-three Solidago taxa are diploid with 2n = 18.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thirty-three taxa are diploid (2n = 18)”
t0“GENUS SOLIDAGO”
Claim · model-written summary
Five Solidago taxa are tetraploid with 2n = 36.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“five are tetraploid (2n = 36)”
t0“GENUS SOLIDAGO”
Claim · model-written summary
Three Solidago aggregate taxa contain diploid and tetraploid cytodemes.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three are aggregate taxa containing both diploid and tetraploid cytodemes”
t0“GENUS SOLIDAGO”
Claim · model-written summary
One Solidago taxon is hexaploid with 2n = 54.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one is hexaploid (2n = 54)”
t0“GENUS SOLIDAGO”
Claim · model-written summary
The authors infer polyploidy contributed to Solidago evolution.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Polyploidy has thus contributed to the evolution of the genus Solidago”
Claim · model-written summary
The authors infer most Solidago species differentiated gradually.
- Outcome
- differentiated graduallye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most of the species have differentiated gradually.”
t0“GENUS SOLIDAGO”
Claim · model-written summary
S. decemflora is tetraploid.
Verbatim
e0“S. decemflora DC. of western North America differs from S. nemoralis Ait. of the same continent by morphological characters, its geographical distribution, and its chromosome number, the first taxon being tetraploid and the second diploid”
Claim · model-written summary
S. nemoralis is diploid.
- Taxon
- S. nemoralis Ait.
Solidago nemoralise0 - Outcome
- diploide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S. decemflora DC. of western North America differs from S. nemoralis Ait. of the same continent by morphological characters, its geographical distribution, and its chromosome number, the first taxon being tetraploid and the second diploid”
Claim · model-written summary
The authors regard S. decemflora and S. nemoralis as distinct species.
- Outcome
- good species and not only varieties of the same speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the two are thus good species and not only varieties of the same species.”
t0“GENUS SOLIDAGO”
Claim · model-written summary
Eastern S. rigida is tetraploid.
- Taxon
- S. rigida L.
Solidago rigidae0 - Outcome
- tetraploide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the eastern one (S. rigida L.) is tetraploid”
Claim · model-written summary
Western S. parvirigida is diploid.
Verbatim
e0“the western one (S. parvirigida Beaudry) is diploid.”
Claim · model-written summary
S. Purshii is diploid.
Verbatim
e0“S. Purshii and S. uliginosa, also possess different chromosome numbers, the first being diploid and the second tetraploid.”
Claim · model-written summary
S. uliginosa is tetraploid.
- Taxon
- S. uliginosa
Solidago uliginosae0 - Outcome
- tetraploide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S. Purshii and S. uliginosa, also possess different chromosome numbers, the first being diploid and the second tetraploid.”