Karyotype of the brain chromosomes of the brown planthopper, Nilaparvata lugens (STAL) infesting the weed-grass Leersia hexandra swartz

Date

10-1986

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Adelina A. Barrion

Abstract

The qualitative and quantitative features of the mitotic prophase nuclei and prometaphase brain chromosomes of the fourth instar nymphs of the Leersia-infesting N. Lugens were investigated utilizing a modified air-drying technique with lacto-aceto-orcein staining. The brain cells underwent active cell division. Seven prophase substages were identified. Their nuclei varied in frequency, size, shape and staining ability. Five types of prometaphase cells were also determined and they showed thirty distinguishable chromosomes (2n=30). The nucleolus organizing region and the XY sex chromosomes were also identified. Karyogram of the autosomes and sex chromosomes was constructed.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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