Indian Society of Genetics & Plant Breeding

Multi-environment evaluation of Spanish bunch groundnut genotypes for fresh seed dormancy

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The present study was carried out to evaluate eight
promising Spanish bunch groundnut genotypes during
four consecutive years (2014, 2015, 2016, 2017) to study
genotype × environmental interactions and to identify stable
sources of fresh seed dormancy in Spanish background in
groundnut. Pooled analysis of variance revealed highly
significant differences among the genotypes and genotype
× environmental interactions for fresh seed dormancy at
weekly intervals indicating that differential behavior of
genotypes for fresh seed dormancy over the environmental
conditions. Based on the results of intensity and duration
of dormancy and germination stability index, identified four
stable advanced breeding lines viz., PBS 12192, PBS 12187,
PBS 12191 and PBS 12190 having high fresh seed dormancy
of three week and two stable advanced breeding lines viz.,
PBS 12189 and PBS 12171 having high fresh seed dormancy
of two week. Therefore, these genotypes can be used as
novel genetic stock of fresh seed dormancy in Spanish
bunch and they can be integrated into breeding programs
to develop high yielding Spanish bunch cultivars with 2-3
weeks of fresh seed dormancy to avoid yield losses due to
in-situ germination at the time of crop maturity.
 

Keywords: Groundnut, Spanish bunch, fresh seed dormancy, stability, germination stability index

Info

Year: 2019
Volume: 79
Issue: 3
Article DOI: 10.31742/IJGPB.79.3.7
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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