Meiosis of chichirca, Catharanthus roseus (L.) G. Don. (Gentianales : Apocynaceae).
Date
7-1992
Degree
Bachelor of Science in Biology
Major Course
Major in Ecology Genetics
College
College of Arts and Sciences (CAS)
Adviser/Committee Chair
Adelina A. Barrion
Abstract
The meiotic index of Catharanthus roseus (L.) G. Don. was 88.96%. Its chromosome number was 2n=16. Abnormalities which were seen during Metaphase I and Anaphase I include laggards, non-congression of bivalents, early and late disjunctions of bivalents. Telophase I and Meiosis II were observed to be normal. Analyses of monocentric pachytene chromosomes showed 1, 2, 3, 7, and 8 were metacentric while chromosomes 4, 5 and 6 were submetacentric. their relative mean lengths ranged from 108.62 to 189.80. The high frequency of bivalent formation during diakinesis and the normal chromosome behavior during the later meiotic stages favored the production of fertile gametes in C. roseus. Its pollen fertility rnged from 88.9% to 96.7% .
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
Thesis
Recommended Citation
Amarillo, Ferdinand E., "Meiosis of chichirca, Catharanthus roseus (L.) G. Don. (Gentianales : Apocynaceae)." (1992). Undergraduate Theses. 10712.
https://www.ukdr.uplb.edu.ph/etd-undergrad/10712
Document Type
Thesis