Cytology of Oryza-infesting and Leersia-infesting populations of the brown planthopper, Nilaparvata lugens (Stal) (Homoptera: Delphacidae)

Date

3-1984

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Adelina A. Barrion

Abstract

MADRID, JANDINA B. 1984. Cytology of Oryza-Infesting and Leersia-Infesting Populations of the Brown Planthopper, Nilaparvata lugens (Stal) (Homoptera: Delphacidae). An undergraduate thesis submitted in partial fulfillment of the requirements of the degree of Bachelor of Science in Biology (Genetics). College of Arts and Sciences, University of the Philippines at Los Banos.

Adviser: Mrs. Adelina A. Barrion

Aside from the three biotype populations of N. lugens which infest rice, a weed grass-infesting population of BPH was discovered recently at the International Rice Research Institute. The two BPH populations were investigated cytologically and found to be significantly different in terms of relative lengths of their pachytene chromosomes, length and width of interphase nuclei and other meiotic stages. Morpho-logy and behavior of chromosomes at different stages of meiosis were determined and described. Meiotic index of rice-infesting BPH was higher than that of weed grass-infesting BPH, however, statistical analysis revealed the variation to be insignificant.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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