Abstract
The karyotype analyses of the Evansia species did not suggest any simple explanation for the origin of the progressional series of chromosome numbers of 2n=26, 28, 30, 32, 34, 36, 42, 44 and 54. A comparison of the karyotypes of geographically adjacent species showed that an increase in chromosome number was accompanied by a decrease in chromosome size. Karyotype differnces did not always suggest lack of affinity between species as was shown between I. japonica and I. confusa which formed fertile hybrids although their karyotypes were very different. The hybrids between I. japonica and I. confusa vary in their chromosome numbers from 2n=39 to 2n=43. The karyotypes of I. wattii and I. confusa showed greater similarities, a correspondence paralleled by their successful hybridization to form F1 hybrids. I. wattii could represent a subspecies of I. confusa. Meiotic divisions in the available clones of I. wattii and I. japonica showed that these 2 species were atypical in that the latter was possibly a triploid and the former the product of a chromosomal interchange.
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Claims 9
Claim · model-written summary
Karyotype analyses gave no simple explanation for the chromosome-number series.
IrisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The karyotype analyses of the Evansia species did not suggest any simple explanation for the origin of the progressional series of chromosome numbers of 2n=26, 28, 30, 32, 34, 36, 42, 44 and 54”
t0“Iris”
Claim · model-written summary
Among adjacent species, chromosome size decreased as chromosome number increased.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in chromosome number was accompanied by a decrease in chromosome size”
t0“Iris”
Claim · model-written summary
I. japonica and I. confusa formed fertile hybrids despite different karyotypes.
- Taxon
- I. japonica
Iris japonicae0 - Material
- I. confusae0
- Outcome
- fertile hybridse0
- Qualifier
- their karyotypes were very differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I. japonica and I. confusa which formed fertile hybrids although their karyotypes were very different”
Claim · model-written summary
Hybrids of I. japonica and I. confusa varied from 2n=39 to 2n=43 chromosomes.
- Taxon
- I. japonicaIris japonicae0
- Material
- I. confusae0
- Outcome
- chromosome numberse0
- Value
- 2n=39 to 2n=43e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrids between I. japonica and I. confusa vary in their chromosome numbers from 2n=39 to 2n=43”
Claim · model-written summary
I. wattii and I. confusa had similar karyotypes.
- Taxon
- I. wattii
Iris wattiie0 - Material
- I. confusae0
- Outcome
- karyotypese0
- Direction
- greater similaritiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The karyotypes of I. wattii and I. confusa showed greater similarities”
Claim · model-written summary
I. wattii and I. confusa successfully formed F1 hybrids.
- Outcome
- successful hybridization to form F1 hybridse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their successful hybridization to form F1 hybrids”
t0“Iris”
Claim · model-written summary
I. wattii may represent a subspecies of I. confusa.
- Taxon
- I. wattiiIris wattiie0
- Outcome
- subspecies of I. confusae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I. wattii could represent a subspecies of I. confusa”
Claim · model-written summary
I. japonica was possibly triploid.
- Taxon
- I. japonicaIris japonicae1
- Outcome
- possibly a triploide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the latter was possibly a triploid”
e1“I. wattii and I. japonica showed that these 2 species were atypical”
Claim · model-written summary
I. wattii may be the product of a chromosomal interchange.
- Taxon
- I. wattiiIris wattiie1
- Outcome
- product of a chromosomal interchangee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the former the product of a chromosomal interchange”
e1“I. wattii and I. japonica showed that these 2 species were atypical”