Abstract
In order to make further survey of distribution of polyploids in the Aster ageratoides subsp. leiophyllus group in the Kanto District and surrounding area, 33 localities having 269 plants were studied karyologically. They were collected from five localities of the District and 28 from the Tohoku District located at the northern regions beyond the Kanto District. In the five localities in the Kanto District, diploids, tetraploids and hexaploids were detected and aneuploids by the addition of B-chromosomes were found in the diploids and the tetraploids as in the previous reports. In the 28 localities of the Tohoku District, only the tetraploids were confirmed and B-chromosome was not found in them at all. The polymorphism of the L^<2E>-chromosomes studied in the tetraploids from the Tohoku District and then the five types were recognized. Of the five types, the II1a was predominant (75.2%) and the II2a was found with the second highest frequency (15.3%). The predominant occurrence of these two types in the District is absolutely the same as in the tetetraploids investigated before.
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Claims 7
Claim · model-written summary
Kanto populations contained diploids, tetraploids and hexaploids.
Not reportedTaxon
Verbatim
e0“In the five localities in the Kanto District, diploids, tetraploids and hexaploids were detected”
Claim · model-written summary
B-chromosome aneuploids were present among Kanto diploids and tetraploids.
Not reportedTaxon
Verbatim
e0“aneuploids by the addition of B-chromosomes were found in the diploids and the tetraploids”
Claim · model-written summary
Tohoku localities contained only tetraploids.
Not reportedTaxon
Verbatim
e0“In the 28 localities of the Tohoku District, only the tetraploids were confirmed”
Claim · model-written summary
Tohoku tetraploids lacked B-chromosomes.
- Outcome
- B-chromosome was not founde0
Not reportedTaxon
Verbatim
e0“B-chromosome was not found in them at all”
Claim · model-written summary
Tohoku tetraploids had five L-chromosome types.
Not reportedTaxon
Verbatim
e0“five types were recognized”
Claim · model-written summary
Type II1a was predominant at 75.2%.
Not reportedTaxon
Verbatim
e0“the II1a was predominant (75.2%)”
Claim · model-written summary
Type II2a had the second highest frequency at 15.3%.
Not reportedTaxon
Verbatim
e0“the II2a was found with the second highest frequency (15.3%)”