CYTOGENETIC STUDIES OF AFRICAN AWNED SQUILLS (DIPCADI SPECIES) IN NIGERIA.
CYTOGENETIC STUDIES OF AFRICAN AWNED SQUILLS (DIPCADI SPECIES) IN NIGERIA.
No Thumbnail Available
Date
1997
Authors
ABIODUN, Adelanwa Micheal
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Nigerian representatives of the African Awned Squills (Dipcadi
Medic) were sampled from natural populations examined during ft'eld
survey and collection trips. These representatives were grown in
botanical nurseries in both University of Ilorin and Ahmadu Bello
University, Zaria. Three taxa were recognised. Chromosome counts
and karyotype study were conducted on the three taxa while meiotic
chromosome study was carried out on two of the three taxa. The genus
Dipcadi was found to be represented by two ploidy levels: diploid, 2n =
12 and tetraploid, 2n = 24. Dipcadi tacazzeanum and Ih filamentosa
were diploids while D^ longifoluim is a tetraploid. The two diploids
were karyotypically diferent. Meiosis was found to be regular in D.
tacazzeanum, with six bivalents, and D^ longifolium with twelve
bivalents. Experimental evidence indicated that all the Nigerian
reprensentatives are of hybrid origin.
Description
A DI SSERTATION SUBMITTED IN PARTIAL FULFILMENT
OF THE REQUIREMENT FOR THE AWARD OF THE DEGREE
OF MASTER OF SCIENCE M.SC IN BOTANY,
DEPARTMENT OF BIOLOGICAL SCIENCES,
UNIVERSITY OF 1LORIN,
ILORIN NIGERIA.
Keywords
CYTOGENETIC STUDIES,, AFRICAN AWNED SQUILLS,, (DIPCADI SPECIES),, NIGERIA