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- W2043955215 abstract "Several cross-pollinations were made between Solanum scabrum (2n = 6x = 72) and S. nigrum (2n = 6x = 72), S. americanum (2n = 2x = 24), and a C 3 amphiploid of the cross S. villosum (2n = 4x = 48) × S. americanum (2n = 2x = 24) with a view to determine their phyletic relationship. It was found that the crosses between S. nigrum and S. scabrum, and S. scabrum and a big-fruited form were accomplished easily, whereas the cross S. scabrum × S. americanum was successful only when S. scabrum, the higher chromosomal form, was used as the maternal parent. The hybrids (F 1 ) exhibited moderate pollen fertility and vigorous growth, and set fruits and seeds abundantly, even though meiotic abnormalities were encountered in most of the pollen mother cells. From the chromosome pairing behaviour in the hybrids, it is concluded that S. americanum is the diploid ancestor of hexaploid S. scabrum and S. nigrum. The latter two species might have evolved from the sterile triploid hybrids of S. villosum × S. americanum by spontaneous amphiploidy. Key words: Solanum, phylogenetics. polyploidy." @default.
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- W2043955215 date "1987-08-01" @default.
- W2043955215 modified "2023-09-25" @default.
- W2043955215 title "Phylogenetic relationships in the evolution of <i>Solanum scabrum</i>" @default.
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- W2043955215 doi "https://doi.org/10.1139/g87-107" @default.
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