Indian Society of Genetics & Plant Breeding

Assesment of genetic variability in sugarcane (Saccharum officinarum L.) under salinity conditions

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An investigation was carried out to study the response of
sugarcane (Saccharum officinarum L.) genotypes to
morphological, physio-biochemical characters and genetic
diversity at molecular level under salt stress at 8.3 dSm–1.
Genotypes were grouped into three major clusters
elucidating a high level of genetic diversity. Molecular
analysis using SSR markers, revealed a total of 54 alleles
with an average of 2.8 alleles/locus ranging from 2 to 6.
Cluster I comprised 6 genotypes of which four were salt
sensitive and two salts tolerant. Cluster II included two salt
tolerant and one (CoS96275) salt sensitive genotype. Only
one salt sensitive genotype (CoS8436) was grouped in
Cluster III.The PIC value per locus ranged from 0.10 to 1.80
with an average of 0.834 for all loci. The range of genetic
distance or coefficient of similarity among sugarcane
genotypes were 0.25-1.00. Two genotypes (CoSe014124 and
CoS767) can be used in breeding to enhance the salinity
tolerance in sugarcane.

Keywords: Sugarcane, salt stress, genetic diversity, SSR marker


Year: 2015
Volume: 75
Issue: 1
Article DOI: 10.5958/0975-6906.2015.00021.8
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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