Abstract
1) At MI in PMC's of F1 N. sylvestris (n=12)×N. otophora (n=12), a pairing range 0-5 was found with mode at 2-3. In the same hybrid Goodspeed (1954) observed 0-7 bivalents with mode at 3.2) At MI in PMC's of F1 N. sylvestris (n=12)×N. tomentosa (n=12), 0-7 bivalents were found with mode at 3. Goodspeed (1954) found pairing ranges of 0-7 with mode at 3 and 0-7 with mode at 2-3 respectively in F1 N. sylvestris×N. setchellii and F1 N. sylvestris× N. tomentosa. Kostoff (1943) found, in F1 N. sylvestris×N. tomentosa, usually univalents or 1 to 4 bivalents and rarely more than 4 bivalents. He also observed, in F1 N. sylvestris×N. tomentosiformis, somewhat less bivalents than in the former. The writer (1955) found 1-9 bivalents with mode at 4 in F1 N. sylvestris×N. tomentosiformis. From the results mentioned above, we can assume 2-4 homologous chromosomes or large homologous portions between sylvestris genome and the genomes of the tomentosa group.3) At MI in PMC's of F1 N. tabacum (n=24)×N. solanifolia (n=12), a pairing range 1-5 was found with mode at 1. Goodspeed also found 0-7 bivalents with mode at 2. Accordingly the conjugational affinity between tabacum and solanifolia genomes is assumed to be generally the same as the intragenomatic affinity in N. tabacum.4) At MI of PMC's of F1 N. Debneyi (n=24)×N. tabacum (n=24), 0-6 bivalents were found with mode at 2. Kostoff also found usually univalents or 1-3 bivalents. From these results it appears that there may be no pairing between tabacum and Debneyi genomes, since a few intragenomatic affinities in N. tabacum are present.5) At MI of PMC's of the hybrid N. rustica×N. paniculata, the writer observed a univalent range 2-12, a bivalent range 2-12 and a trivalent range 0-10. In the same hybrid, Goodspeed found usually 12 bivalents and occasionaly 1 trivalent or rarely 2 trivalents. Kostoff also found usually 12 bivalents and 12 univalents, and rarely 1 trivalent. The writer observed more trivalents, but N. paniculata is recognized to be one of the ancestors of N. rustica.
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Claims 12
Claim · model-written summary
The N. sylvestris × N. otophora hybrid showed 0-5 pairings, with a mode of 2-3 at MI.
- Taxon
- N. sylvestris
.jpg?width=60)
Nicotiana sylvestrise0 - Material
- F1 N. sylvestris (n=12)×N. otophora (n=12)e0
- Outcome
- pairing rangee0
- Value
- 0-5e0
- Qualifier
- mode at 2-3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“At MI in PMC's of F1 N. sylvestris (n=12)×N. otophora (n=12), a pairing range 0-5 was found with mode at 2-3.”
Claim · model-written summary
The N. sylvestris × N. tomentosa hybrid showed 0-7 bivalents with a mode of 3 at MI.
- Taxon
- N. sylvestrisNicotiana sylvestrise0
- Material
- F1 N. sylvestris (n=12)×N. tomentosa (n=12)e0
- Outcome
- bivalentse0
- Value
- 0-7e0
- Qualifier
- mode at 3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At MI in PMC's of F1 N. sylvestris (n=12)×N. tomentosa (n=12), 0-7 bivalents were found with mode at 3.”
Claim · model-written summary
The author found 1-9 bivalents with a mode of 4 in N. sylvestris × N. tomentosiformis.
- Taxon
- N. sylvestrisNicotiana sylvestrise0
- Material
- F1 N. sylvestris×N. tomentosiformise0
- Outcome
- bivalentse0
- Value
- 1-9e0
- Qualifier
- mode at 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The writer (1955) found 1-9 bivalents with mode at 4 in F1 N. sylvestris×N. tomentosiformis.”
Claim · model-written summary
The authors inferred 2-4 homologous chromosomes or large portions between the sylvestris and tomentosa-group genomes.
Verbatim
e0“we can assume 2-4 homologous chromosomes or large homologous portions between sylvestris genome and the genomes of the tomentosa group.”
Claim · model-written summary
The N. tabacum × N. solanifolia hybrid showed a pairing range of 1-5 with a mode of 1.
- Taxon
- N. tabacum
Nicotiana tabacume0 - Material
- F1 N. tabacum (n=24)×N. solanifolia (n=12)e0
- Outcome
- pairing rangee0
- Value
- 1-5e0
- Qualifier
- mode at 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At MI in PMC's of F1 N. tabacum (n=24)×N. solanifolia (n=12), a pairing range 1-5 was found with mode at 1.”
Claim · model-written summary
Conjugational affinity between tabacum and solanifolia genomes was inferred to be generally the same as intragenomic affinity in N. tabacum.
- Taxon
- N. tabacumNicotiana tabacume0
- Outcome
- conjugational affinitye0
- Comparator
- intragenomatic affinity in N. tabacume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the conjugational affinity between tabacum and solanifolia genomes is assumed to be generally the same as the intragenomatic affinity in N. tabacum.”
Claim · model-written summary
The N. Debneyi × N. tabacum hybrid showed 0-6 bivalents with a mode of 2.
Verbatim
e0“At MI of PMC's of F1 N. Debneyi (n=24)×N. tabacum (n=24), 0-6 bivalents were found with mode at 2.”
Claim · model-written summary
The author inferred there may be no pairing between tabacum and Debneyi genomes.
- Taxon
- N. tabacumNicotiana tabacume0
- Outcome
- no pairing between tabacum and Debneyi genomese0
- Qualifier
- since a few intragenomatic affinities in N. tabacum are presente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there may be no pairing between tabacum and Debneyi genomes, since a few intragenomatic affinities in N. tabacum are present.”
Claim · model-written summary
The N. rustica × N. paniculata hybrid showed 2-12 univalents.
- Taxon
- N. rustica
_(Solanaceae)_Plant.JPG?width=60)
Nicotiana rusticae0 - Material
- N. rustica×N. paniculatae0
- Outcome
- univalent rangee0
- Value
- 2-12e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(Solanaceae)_Plant.JPG?width=500)
Verbatim
e0“At MI of PMC's of the hybrid N. rustica×N. paniculata, the writer observed a univalent range 2-12, a bivalent range 2-12 and a trivalent range 0-10.”
Claim · model-written summary
The N. rustica × N. paniculata hybrid showed 2-12 bivalents.
- Taxon
- N. rusticaNicotiana rusticae0
- Material
- N. rustica×N. paniculatae0
- Outcome
- bivalent rangee0
- Value
- 2-12e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At MI of PMC's of the hybrid N. rustica×N. paniculata, the writer observed a univalent range 2-12, a bivalent range 2-12 and a trivalent range 0-10.”
Claim · model-written summary
The N. rustica × N. paniculata hybrid showed 0-10 trivalents.
- Taxon
- N. rusticaNicotiana rusticae0
- Material
- N. rustica×N. paniculatae0
- Outcome
- trivalent rangee0
- Value
- 0-10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At MI of PMC's of the hybrid N. rustica×N. paniculata, the writer observed a univalent range 2-12, a bivalent range 2-12 and a trivalent range 0-10.”
Claim · model-written summary
The author observed more trivalents in this hybrid than prior researchers.
- Taxon
- N. rusticaNicotiana rusticae0
- Outcome
- trivalentse0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The writer observed more trivalents, but N. paniculata is recognized to be one of the ancestors of N. rustica.”