Cytology of the Philippine native orchid Ascocentrum miniatum (Lindl.) Schltr. (Orchidaceae)

Date

4-2000

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Dela Viña, Celia

Abstract

BSTRACT JOMENTO, INGRID LORELEI, RUBIO. University of the Philippines at Los Banos. April 2000. Cytolou of the Philippine Native Orchid Ascocentrum minialum (Lindl.) Schltr. (Orchidaceae).

Adviser: Prof. Celia B. dela Viña

Acetocarmine squash technique was employed to determine the chromosome number and meiotic behavior of the Philippine native orchid Ascocentrum minialum (Lindl.) Schltr. Cytological observations revealed a chromosome number of about 2n=38 to 2n=42. High frequency of chromosome abnormalities like non-congression at metaphase I (97.3%) and laggards at anaphase I (28.9%) were observed at Meiosis I. The same chromosome behaviors were exhibited in metaphase II (100%) and anaphase II (41.9%). The factor possibly contributing to the abnormal metaphase and anaphase stages were explained. However, telophase I and II were found to be normal. Pollinia fertility evaluated by starch-12K1 technique revealed 71% fertility.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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