Indian Society of Genetics & Plant Breeding

Analysis of molecular diversity and differentiation of photoperiod sensitive and insensitive rice varieties

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A study was undertaken to differentiate photoperiod
sensitive and photoperiod insensitive rice varieties and
to identify putative RAPD marker (s) associated with the
trait. The genetic diversity analysis among photoperiod
sensitive and photoperiod insensitive rice varieties using
different DNA amplicons, grouped 40 varieties into two
major clusters and nine sub-clusters. Sixty five per cent
of photo sensitive varieties and 60% photo insensitive
varieties were grouped in distinct clusters. The result
indicated that response to photoperiod had played a major
role in the pattern of clustering. The most distant pairs
of rice varieties revealed from genetic distance are Bhagya
and Ptb 12, Bhagya and Ptb 7, Sagara and Bhagya, and
Dhanya and Bhagya. These distant varieties can be utilized
in future breeding programmes as parents to get promising

Keywords: Rice, photoperiod sensitivity, molecular markers, RAPD, Jaccard's similarity index, cluster analysis


Year: 2007
Volume: 67
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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