Indian Society of Genetics & Plant Breeding
Approximately 11% of the Indian rice varieties notified from
1969 to 2012 have IR-8 in their parentage. More than 30%
notified varieties during this period are derived from
germplasm with ‘IR’ in their parentage. India is one of the
centers of diversity in rice and broadening of genetic base
of cultivated rice can be successfully performed using
indigenous germplasms. Genetic diversity among 42 Indian
rice varieties (Oryza sativa L.), including landraces, aus
cultivars and modern varieties of India were investigated
for phenotype as well as genotype diversity. Genetic
diversity analysis using genome-wide SNP panel suggested
that aus cultivars, landraces and indica rice germplasm are
genetically very close. The SNP panel was based on single
copy genes thereby reflecting functional diversity of the
germplasm set. The dendrogram based on molecular
marker analysis grouped the 42 rice cultivars into 4 diverse
groups. Further, population structure analysis also resulted
to 4 sub populations. These sub population differentiated
aus germplasm set from other accessions. Further, principal
component analysis based on phenotype also suggested
the closeness of aus cultivars, landraces and indica rice
germplasm sets. Information generated through genetic,
phenotypic and comprehensive diversity profiles in the
present study can be efficiently utilized in breeding high
yielding rice varieties.
Keywords: Rice, landraces, structure, molecular tags, genetic diversity
Year: 2016
Volume: 76
Issue: 3
Article DOI: 10.5958/0975-6906.2016.00039.0
Print ISSN: 0019-5200
Online ISSN: 0975-6906
Nivedita Singh info_circle
Shana Majumder info_circle
Sanjay Singh info_circle
Prashant Vikram info_circle
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