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Evolutionary dynamics of chromosomal diversity in Saccharum spontaneum population from Punjab and Haryana, India

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Title Evolutionary dynamics of chromosomal diversity in Saccharum spontaneum population from Punjab and Haryana, India
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Creator Sobhakumari V.P.
 
Subject Sugarcane, Chromosome, Cytotype, Polyploid, Ploidy evolution, Evolutionary origin
 
Description Not Available
Saccharum spontaneum, the wild species of sugarcane, is an important germplasm resource with
exceptional properties of pest and disease resistance and stress tolerance. Chromosomal diversity and its evolutionary dynamics in this species have been revealed through the study of 88 clones collected from the states of
Punjab and Haryana, India. Twelve cytotypes were identified with five euploids [2n=40 (5x), 48 (6x), 56 (7x),
64 (8x), 72 (9x)] and seven aneuploids (2n=50, 52, 54, 60, 70, 74, 76). The random meiotic analysis showed
predominant bivalent formation. The clone IND 16-1847 (2n=72) showed meiotic abnormalities like univalents,
laggards, bridges, and multipolar chromosome segregation. Analysis of the evolutionary origin of different cytotypes revealed the independent, as well as multiple origins and the ploidy evolution, might be a network type
rather than in a single direction. This leads to the increased allelic and genetic variation and gene flow among different ploidy levels of S. spontaneum.
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Date 2021-08-26T04:52:08Z
2021-08-26T04:52:08Z
2020-08-01
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/60583
 
Language English
 
Relation Not Available;
 
Publisher Japan Mendel Society