Cytological study of three cultivars of coconuts, tambolilid, Laguna and coconiño

Aurora Q. Tan

Date

10-1969

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Fernando A. Bernardo

Co-adviser

Emil Q. Javier

Abstract

Cytological investigations of three cultivars of coconut showed regular meiosis for the typica as represented by Laguna, which had 11 per cent pollen sterility and irregular meiosis for nana (Coconino) and javanica (Ttrobolllid) which exhibited 30 per cent and 41 per cent pollen sterility, respectively. Abnormalities that were observed (included laggards, bridges, ttnsynchronized chromosome movements, unequal chromosome distribution, chromosome isolation and persistence of nucleolus. Polyspores (5 - 10 spores) were observed more often in Coconino (21 per cent) than in Laguna (0 per cent) and Tambolilid (11 per cent). Irregular orientation of spindle as reflected by position of chromosome was common in all three cultivars. Chromosome counts made revealed It U for all three cultivars. Varying chromosome number and multivalents were found in Coconino and Tambolilid.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1969 A42 T36

Document Type

Thesis

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