Indian Society of Genetics & Plant Breeding

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Molecular characterization of groundnut (Arachis hypogaea L.) germplasm lines and varietal set for yield and yield attributing traits

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The genetic assessment of 90 germplasm lines and six
varieties of groundnut (Arachis hypogaea L.) were done
with 13 morphological traits and 125 Simple Sequence
Repeats markers. Out of 125 molecular markers, 26 were
polymorphic and produced 105 alleles. The genetic diversity
was found to be 52-83 per cent and Polymorphic Information
Content (PIC) was 0.46- 0.81 with a mean of 0.42. indicating
higher magnitude of genetic diversity in the test genotypes.
Analysis of molecular variance showed variation among
and within individuals based on allelic variation. Principal
Co-ordinate Analysis based on origin of the genotypes
formed three major population groups and the genetic
analysis determined by population structure divided all the
germplasm lines in to 10 populations. Significant and
positive correlation was observed between hundred kernel
weight and hundred pod weight (r=0.769) and kernel yield
(r=0.899); sound mature kernel and pod weight with kernel
yield, weight of kernels and harvest index. Genotypes from
distinct clusters may be selected in hybridization
programme for groundnut improvement. The information
on clustering of genotypes will be helpful in identification
of novel and superior germplasm for hybridization and
development of improved varieties.
 

Keywords: Groundnut, germplasm lines, Simple Sequence Repeat, Polymorphic Information Content (PIC), Principal Coordinate Analysis (PCA)

Info

Year: 2019
Volume: 79
Issue: 1
Article DOI: https://doi.org/10.31742/IJGPB.79.1.8
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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