Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
available germplasm in crop improvement program. In this context, the present study
was conducted to characterize black gram genotypes for morpho-physiological and
yield related traits following imposition of water stress at flowering stage for identifying
tolerant genotypes and using in genetic enhancement program.
Methodology
A field experiment was conducted under well-watered and water stressed conditions
during kharif 2021 with 40 genotypes in a randomized complete block design (RCBD)
having 3 replications. The various morpho-physiological traits were recorded where a
dry spell of 10 days coincided with the flowering stage. The data recorded were on
various morpho-physiological traits including SPAD chlorophyll meter reading
(SCMR), NDVI, CTD, fv/fm, RWC, membrane stability index (MSI), proline,
malondialdehyde (MDA), yield and its attributes. The data were statistically analyzed
with SAS software (Version 9.3; SAS Institute, Cary, NC). Analysis of variance and
least significant difference (LSD) test was applied to compare the genotypes.
Results
The pooled analysis of variance (ANOVA) revealed significant genotypic differences
(p0.05) for all morphophysiological
logical traits
indicating the magnitude of
differences in genotypes were
sufficient to select superior
genotypes against drought stress.
While, the genotype × treatment
interaction effect was also found
to be significant for most of the
morpho-physiological
traits except pod length
and cluster number. The
significant variation due to
genotype, treatment and
their interaction indicated
that these traits were
influenced by both genetic
and treatment conditions.
The genotypes under
water stress showed
Managing genetic resources for enhanced stress tolerance
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