Abstract
Cytoplasmic relationship between 37 tuberous Solanum accessions and hybrids and two Lycopersicon species was investigated by restriction fragment pattern analysis of chloroplast DNA using eight endonucleases. Variations found in their chloroplast DNAs were subjected to mutation analysis, from which a phylogenetic tree was constructed as shown in Fig. 4. The 30 species studied are classified into four groups from their chloroplast DNA similarities: (1) South American species and Mexican polyploid species, (2) Mexican diploid species, (3) S. etuberosum, and (4) S. lycopersicoides and Lycopersicon species. These groups correspond well to the groups established from crossability by Hawkes (1978). Cytoplasmic differences between 22 species in the first group are so small that these species seem to be of recent origin. Mexican diploid species in the second group greatly differ from those in the first group, and also from each other. S. etuberosum differs from all others by, at least, 21 mutational changes. S. lycopersicoides is rather closely related to the Lycopersicon species, and is different from other Solanum species by, at least, 21 mutational changes. Cytoplasms of all cultivated species except common potato, S. tuberosum ssp. tuberosum have originated monophyletically from S. stenotomum. The cytoplasm of common potato is revealed to have derived from Chilean tuberosum as pointed out by some workers, but the cytoplasm donor to Chilean tuberosum remains unidentified.
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Claims 8
Claim · model-written summary
Thirty species were classified into four chloroplast groups.
SolanumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Solanum”
e0“The 30 species studied are classified into four groups from their chloroplast DNA similarities”
Claim · model-written summary
The chloroplast groups corresponded well to crossability groups.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Solanum”
e0“These groups correspond well to the groups established from crossability by Hawkes (1978)”
Claim · model-written summary
Cytoplasmic differences among 22 first-group species were small.
- Outcome
- Cytoplasmic differences between 22 species in the first group are so smalle0
- Value
- 22 speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Solanum”
e0“Cytoplasmic differences between 22 species in the first group are so small that these species seem to be of recent origin”
Claim · model-written summary
Mexican diploid species differed from first-group species and each other.
- Outcome
- greatly differ from those in the first group, and also from each othere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Solanum”
e0“Mexican diploid species in the second group greatly differ from those in the first group, and also from each other”
Claim · model-written summary
S. etuberosum differed from all other species by at least 21 changes.
- Taxon
- S. etuberosum
.jpg?width=60)
Solanum etuberosume0 - Outcome
- differs from all otherse0
- Value
- 21 mutational changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“S. etuberosum differs from all others by, at least, 21 mutational changes”
Claim · model-written summary
S. lycopersicoides was close to Lycopersicon and differed from other Solanum by at least 21 changes.
- Taxon
- S. lycopersicoidesSolanum lycopersicoidese0
- Outcome
- different from other Solanum speciese0
- Value
- 21 mutational changese0
Verbatim
e0“S. lycopersicoides is rather closely related to the Lycopersicon species, and is different from other Solanum species by, at least, 21 mutational changes”
Claim · model-written summary
Cultivated species except common potato had monophyletic cytoplasms from S. stenotomum.
- Outcome
- originated monophyletically from S. stenotomume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Solanum”
e0“Cytoplasms of all cultivated species except common potato, S. tuberosum ssp. tuberosum have originated monophyletically from S. stenotomum”
Claim · model-written summary
Common potato cytoplasm derived from Chilean tuberosum; that donor remained unknown.
Verbatim
e0“The cytoplasm of common potato is revealed to have derived from Chilean tuberosum as pointed out by some workers, but the cytoplasm donor to Chilean tuberosum remains unidentified”