Cytogenetics of three canna (C. x Generalis): 'President', 'Richard Wallace' and 'Salmon pink' (Zingiberales: Cannaceae).

Miriam C. Du

Date

4-1998

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Merlyn S. Mendioro

Abstract

Anthers of three Canna x generalis cultivars: 'President 'Richard Wallace' and 'Salmon pink' were studied cytologically. The basic chromosome number of the three cultivars was found to be n=9. Diakinesis showed that 'Salmon pink' was diploid (2n=18), while 'President' and 'Richard Wallace' are triploids (3n--27). Univalents, (21,4.08%; 61,2.04%) ring (1.02%) and chains (of 3, 2.04; of 5, 1.02%) were observed in 'Salmon pink'. The triploids possessed chromosome configuration such as trivalents, bivalents and univalents. Meiosis except for diakinesis in the three cultivars were basically the same. Laggards, early disjunction, asynchronous movement, nondisjunction and late disjunction of chromosomes were the abnormal configurations observed but at low frequency. The high frequency of bivalent formation (89.80%) during diakinesis and in the later stages of ineiosis accounted for the high pollen fertility of pink. 'President" (56%) and 'R. Wallace' (78%) have low fertility due to uneven segregation of chromosomes at anaphase I.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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