The chromosomal behavior of Azolla mexicana 2001 at meiosis and of Azolla caroliniana 3005 and Azolla microphylla 4003 at mitosis

Date

3-1991

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Dolores A. Ramirez

Abstract

Three different species of Azolla namely, Azolla mexicana 2001 from Graylodge, California, U.S.A., Azolla caroliniana 3005 from Paraguay, Paraguay, and Azolla microphylla 4003 from Fujie, Fuzhou, China were studied. The chromosome number at diakinesis and meiotic behavior at different stages of Azolla mexicana 2001 were determined. Results showed that chromosomal behavior at meiosis was normal. Univalent and bivalent formation were apparent. The chromosome number ranged from 2n=32 to 2n=60. Laggards were observed at Metaphase I while different tetrad configurations were observed at Telophase II. The mitotic chromosome number of Azolla caroliniana 3005 and Azolla microphylla 4003 were determined at C-metaphase. Azolla caroliniana 3005 showed a wide range of chromosome number ranging from 2n=18 to 2n=48. On the other hand, Azolla microphylla 003 showed a wider range of variability on its chromosome number, ranging from 2n=16 to 2n=48.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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