Journal
PLANT SYSTEMATICS AND EVOLUTION
Volume 280, Issue 3-4, Pages 143-151Publisher
SPRINGER WIEN
DOI: 10.1007/s00606-009-0173-9
Keywords
Meiosis; Pollen germinability; Anemone type chrysanthemum; Small inflorescence
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Funding
- National Key Technology R&D Program, China [2006BAD01A1806]
- Program for New Century Excellent Talents in Universities, Ministry of Education, China [NCET-06-0489]
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Meiotic behavior in pollen mother cells and in vitro pollen germination were examined in a sample of small-flowered anemone type chrysanthemum cultivars. Bivalent formation predominated at metaphase I in all the cultivars although some univalents and multivalents (mainly quadrivalents) were observed. Lagging chromosomes, chromosome bridges, micronuclei and polyads were observed at anaphase I/telophase I and anaphase II/telophase II. Pollen germinability ranged from 0.3 to 25.6% and was below 10% in 15 of the 22 cultivars. A significant positive correlation was established between disk floret length (tube + lobe)/style length and the frequency of chromosome bridges at anaphase II/telophase II, and negative ones both between disk floret length/style length and pollen germinability, and between the frequency of univalents at metaphase I and pollen germinability.
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