Cytogenetics of three Canna cultivars

Abstract

Anthers of three cultivars of Canna spp. (Bandera Española), namely, 'President', 'Richard Wallace', and 'Salmon Pink' were fixed in Carnoy's solution to examine their chromosomal behavior at meiosis. Except at diakinesis, meiosis in the three cultivars was basically the same. The basic chromosome number of the three cultivars was determined to be n=9. Diakinesis showed that 'Salmon Pink' is a diploid (2n=18) while 'President' and 'Wallace' are triploids (3n=27). Univalents (6.12%), rings (1.02%), and chains (3.06%) were observed in the diploid. The triploids exhibited chromosome configurations such as trivalents, bivalents and univalents. Abnormal configurations such as laggards, early disjunction, asynchronous movement, nondisjunction and late disjunction of chromosomes were infrequent. The high frequency of bivalent formation (89.80%) during diakinesis and in the later stages of meiosis accounted for the high pollen fertility of both diploid and triploid cultivars: 'Salmon Pink' (88%), 'President' (56%), and 'Richard Wallace' (78%).

Source or Periodical Title

Philippine Agricultural Scientist

ISSN

317454

Page

147-154

Document Type

Article

Subject

'President', 'Richard Wallace', 'Salmon Pink', Canna, Chromosomes, Cytogenetics, Fertility, Meiosis

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