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Secondary chromosomal association in kidney bean (Phaseolus vulgaris L.)
Joint Authors
Source
Jordan Journal of Biological Sciences
Issue
Vol. 7, Issue 1 (31 Mar. 2014), pp.71-74, 4 p.
Publisher
The Hashemite University Deanship of Academic Research and Graduate
Publication Date
2014-03-31
Country of Publication
Jordan
No. of Pages
4
Main Subjects
Abstract EN
The present study documents the mutagenic efficacy of gamma ray and sodium azide on the chromosomal association pattern of bivalents and meiotic behavior in Phaseolus vulgaris L.
The seeds were irradiated with different doses of gamma rays viz.10 krad, 20 krad, and 30 krad from a 60Co source and thereafter, the seeds were treated with 0.3 % of freshly prepared sodium azide solution for three hours, respectively.
The results clearly show the formation of various types of secondary chromosomal association among bivalents.
Secondary association is defined as the tendency of bivalents to lie in pairs having diffused connections.
The phenomenon of secondary pairing manifested from metaphase I stage and persisted upto metaphase II stage.
The bivalents lie side by side and end to end to form secondary pairing.
A secondary association between bivalents is considered to be of great significance as it is being taken as an indicator of ploidy in plants.
Apart from secondary chromosomal association, other meiotic abnormalities were also noticed.
These include precocious movement of chromosomes at metaphase I/II (2.83 %), stickiness at metaphase I / II (3.45 %), stickiness at anaphase I / II (2.20 %), bridge (1.25 %), unorientation (0.94 %), micronuclei (1.88 %) etc.
This phenomenon, along with other meiotic aberrations affects the pollen fertility considerably3.
American Psychological Association (APA)
Kumar, Girjesh& Chaudhary, Nitu. 2014. Secondary chromosomal association in kidney bean (Phaseolus vulgaris L.). Jordan Journal of Biological Sciences،Vol. 7, no. 1, pp.71-74.
https://search.emarefa.net/detail/BIM-366035
Modern Language Association (MLA)
Kumar, Girjesh& Chaudhary, Nitu. Secondary chromosomal association in kidney bean (Phaseolus vulgaris L.). Jordan Journal of Biological Sciences Vol. 7, no. 1 (Mar. 2014), pp.71-74.
https://search.emarefa.net/detail/BIM-366035
American Medical Association (AMA)
Kumar, Girjesh& Chaudhary, Nitu. Secondary chromosomal association in kidney bean (Phaseolus vulgaris L.). Jordan Journal of Biological Sciences. 2014. Vol. 7, no. 1, pp.71-74.
https://search.emarefa.net/detail/BIM-366035
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 73-74
Record ID
BIM-366035