Indian Society of Genetics & Plant Breeding

Microsatellite markers-based assessment of genetic diversity and population structure in arecanut (Areca catechu L.)

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Genetic relationships existing amongst 60 arecanut accessions were assessed by employing nine polymorphic microsatellite primers.
A total of 42 alleles were detected, with an average of 4.66 alleles per locus. The PIC values ranged from 0.50 to 0.78, with an average
of 0.69. Expected heterozygosity (
He) was highest for the exotic accessions (0.31), moderate for Konkan- I and II accessions, while the
least heterozygosity was observed for the accessions from Maidhan tract (Karnataka) and Andaman and Nicobar Islands. Mean fxation
index (
FST) of 0.28 indicated a high level of population diļ¬€erentiation. The UPGMA cluster analysis grouped the accessions in to two
major clusters- the indigenous Konkan accessions clustered separately in a distinct cluster along with Maidhan accessions. In the second
major cluster, indigenous accessions from North East India formed a unique sub-cluster, while accessions from Andaman and Nicobar
Islands were grouped with exotic accessions.

Keywords: Accessions, Areca catechu, Genetic diversity, Microsatellite/SSR markers.

Info

Year: 2021
Volume: 81
Issue: 4
Article DOI: 10.31742/ISGPB.81.4.16
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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