Checkered Prophase I in Crown Daisy
Autor: | M. L. H. Kaul, Jaswinder Kaur |
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Rok vydání: | 1995 |
Předmět: | |
Zdroj: | CYTOLOGIA. 60:195-203 |
ISSN: | 1348-7019 0011-4545 |
DOI: | 10.1508/cytologia.60.195 |
Popis: | In addition to normal bivalency (15%), the PMCs of the four head types (white and yellow radiate and ligulate) of Chrysanthemum coronarium (crown daisy) exhibit bivalent interlocks (55%), translocation rings (15%) and telomere adhesions (9%). But only one of these three anomalies, never all the three, occur in the PMC of each head type. Despite these prophase I anomalies, the subsequent meiosis from metaphase I to its completion is normal in all the four head types; the gametic- and seed-fertility are high (95%). Why do these anomalies occur, why are these retained from generation to generation and how their interference in meiotic course is prevented remain cytogenetic puzzles. |
Databáze: | OpenAIRE |
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