Cytological analysis of some species of the genera Pennisetum and Setaria

Bhattacharya, B. (1974) Cytological analysis of some species of the genera Pennisetum and Setaria. Plant Sciences, 6. pp. 1-10.

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Abstract

Both cultivated and wild strains of the two genera. Pennisetum and Setaria of the tribe Paniceae have been studied. Different populations were collected from different regions and Karyotype analysis was carried out. In the genus Pennisetum, the chromosome numbers determined range from 2n=14 to 54 indicating basic sets ranging from x=7 and x=9 respectively. The present findings confirm the role of structural alterations of chromosomes in the origin of the different cultivated types. Polyploidy—particularly allopolyploidy – has formed a major factor in speciation within this genus. In the genus Setaria, the chromosome numbers reported range from 2n=18 to 54 confirming the basic set to be x=9 chromosomes. In the evolution of different forms within this genus, structural allerations of chromosomes followed by allopolyploidy have played a significant role. Cytological observations have been made on Pennisetum and Setaria in centres all over the world and they indicate the presence of polyploid and aneuploid races in them. The present work was undertaken on mainly cultivated strains of the well known species of these two genera, obtained from Agricultural Stations in different parts of India. Karyotype studies were initiated with the help of improved techniques to study the relative roles of structural alterations and polyploidy in evolution within these genera and to find out the relationships, if possible, between the different species which might facilitate their breeding studies and give an idea of their possible origin.

Item Type: Article
Author Affiliation: University of Calcutta, Calcutta, India
Subjects: Agricultural Engineering
Crop Improvement
Divisions: General
Depositing User: Library ICRISAT-InfoSAT
Date Deposited: 28 Feb 2012 14:40
Last Modified: 28 Feb 2012 14:40
URI: http://eprints.icrisat.ac.in/id/eprint/3301

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