Indian Society of Genetics & Plant Breeding

Maximizing rice yield gains through component trait analyses in eastern Indo-Gangetic plains of India

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An investigation was carried out to evaluate the yield performance of a set of 145 indigenous collections of rice along with ten popular
varieties as checks in eastern Indo-Gangetic plains of India. The study revealed considerable phenotypic diversity among the accessions
for seed yield and its components, besides genotype × environment interactions. Statistical analyses including pooled analysis, biplot
analysis and cluster analysis demonstrated signifcant genetic variability among the accessions for most of the traits studied. The
accessions were also screened for major biotic stresses like leaf blast and yellow stem borer and found that 99 accessions were resistant
and moderately resistant for leaf blast and 56 accessions showed moderate resistance against yellow stem borer. The study was successful
in identifying some highly promising accessions on the basis of their performance for various seed yield component and biotic stress
resistance. Among these, IC463183, IC462334, IC577390, IC466655 and IC579017 are particularly worth noting due to their excellence
performance for various yield attributes across the years and resistance to both leaf blast and yellow stem borer. Such accessions could
be potentially utilized breeding for superior rice cultivars suitable to the eastern Indo-gangetic plains of India.

Keywords: Biotic stresses, Biplot analysis, Diversity, G × E interaction, Indo-Gangetic plains.

Info

Year: 2021
Volume: 81
Issue: 4
Article DOI: 10.31742/ISGPB.81.4.3
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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