Open AccessMale and female meiosis in diploid and colchitetraploid Phlox drummondii Hook. (Polemoniaceae)
Author(s) -
KOUL K.K.,
RAINA S.N.
Publication year - 1996
Publication title -
botanical journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.872
H-Index - 68
eISSN - 1095-8339
pISSN - 0024-4074
DOI - 10.1111/j.1095-8339.1996.tb02074.x
Subject(s) - biology , meiosis , chiasma , ploidy , meiocyte , pollen , botany , genetics , anaphase , chromosome , gene
Comparative studies on male and female meiosis in diploid (2n = 2x = 14) and colchitetraploid (2N = 4x = 28) ornamental Phlox drummondii reveal higher chiasma frequency in embryo‐sac mother cells as compared with pollen mother cells in the diploid, and significant differences in the pairing properties of chromosomes in the pollen mother cells and embryo‐sac mother cells of the colchitetraploid. Male meiosis in the colchicine‐induced autotetraploid was abnormal with 51.70% of chromosomes associated in quadrivalents and tridents in 96% of the cells. This was followed by discordant anaphase I disjunction. In the female meiocytes the chromosomes formed 14 bivalents in 86.66% of the cells. Quadrivalents (1–3) appeared only in 13.34% of the cells. It is concluded that meiosis in male and female cells of the colchitetraploid is governed and regulated by different controlling systems of gene(s).