Publication Type

Journal Article

Journal Name

CYTOLOGIA

Publication Date

1-1-1987

Abstract

Cytological features during meiosis and at mitosis unravel the genetic system of any taxon. They furnish vital cues for observed genetic segregation and breeding behavior of the species. Mitosis governs a regular and an even distribution of essential cell constituents, specifically the hereditary components from a parental cell to two daughter cells through successive nuclear divisions. Also, the base line karyotype data are useful in understanding phylogenetic relationships among populations within a species. Nuclear division or karyokinesis in the brown planthopper Nilaparvata lugens (Stal) consists of mitosis and meiosis. Mitosis is regularly associated with nuclear division of somatic cells; meiosis occurs in conjunction with the formation of reproductive cells or gametes. Most of the studies on N. lugens’ cytology pertain to meiotic divisions at the primary and secondary spermatocytes (Saitoh et al. 1970, Liquido 1978, Den Hollander 1982, Saxena and Barrion 1982a, 1982b, 1983, 1986). Little is known about gonial mitosis of N. lugens. No cellular and chromosomal investigations have been made on somatic tissues such as the brain of N. lugens. We therefore studied the karyomorphology and morphometrics of the somatic chromosomes in brain cells of N. lugens. © 1987, Japan Mendel Society, International Society of Cytology. All rights reserved.

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