Morphology and cytogenetics of male mango fruit fly : bactrocera philippinensis drew and hancock.

Date

4-2003

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Adelina A. Barrion

Abstract

The length measurements of five abdominal reproductive characters of male mango fruit fly, Bactrocera philippinensis Drew and Hancock were measured using a stereo-binocular microscope with calibrated micrometer. Lengths ranged from 0.27- 0.36mm, wherein the most frequent measurements were 0.30mm- subgenital plate (34%), aedeagal length (34%), pygofer length (40%), paramere length (30%); and 0.33mm-connective length (24%). The least frequent measurement (0.27mm) was observed in all the five abdominal characters. Results show that through Friedman's test members of the local population of B. philippinensis were morphologically similar. Cytogenetic analysis showed normal meiosis for majority of the cells examined except for some cells that exhibited bridge formation during Anaphase 1. The diploid chromosome number of B. philippinensis was 2n=12, consisting of five pairs of autosomes and one pair of heteromorphic sex chromosomes, XY. The average relative lengths range from 0.049-0.133. One-way analysis of variance (ANOVA), which was used to statistically compare the average relative lengths of the chromosomes of the Metaphase 1 cells, showed that the average relative lengths are the same. The local populations of male B. philippinensis sampled from mango fields of Institute of Plant Breeding (IPB) are morphometrically and cytogenetically similar.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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