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SUMMARYThe karyotype and microsporogenesis of triploid Crocus sativus were studied. The high percentage of trivalents observed at metaphase I (on average, 7.3 trivalents per cell) together with the karyotype configuration confirm autotriploidy. Some considerations about the presence of one unique chromosome in the karyotype and about the origin of triploidy are presented.
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Giuseppe Chichiriccò (1984) studied this question.
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