Assessment of the genetic diversity of groundnut (Arachis hypogaea L.) genotypes for kernel yield, oil and fodder quantity and quality under drought conditions
2021
The objective of this study was to determine drought tolerance, kernel (KY) and fodder
yield and quality amongst diverse groundnut genotypes for direct production or
breeding. Hundred genotypes were evaluated at ICRISAT, India during 2018–2019
and 2019–2020 under drought-stressed (DS) and non stressed (NS) conditions. Data
were collected on KY; oil content (OC); oil yield (OY); protein content; palmitic,
stearic, oleic, and linoleic acid contents; haulm yield (HY); and fodder quality parameters
such as the contents of dry matter, ash, nitrogen (NC), neutral detergent fiber
(NDFDM), acid detergent fiber (ADFDM), acid detergent lignin (ADLDM), in vitro
digestibility, and metabolizable energy. Data were subjected to parametric and nonparametric
statistical analyses. Combined analysis of variance revealed significant
(P < .05) genotype differences for all assessed traits. Genotype × water regime interaction
effects were significant for KY, OC, ash, NC, NDFDM, and ADLDM. Kernel
yield positively and significantly (P < .05) correlated with OY (r = .99), LAC
(r = .13), ash (r = .32), and NDFDM (r = .54) under DS condition. Haulm yield was
positively and significantly (P < .05) correlated with OC (r = .24),NDFDM(r = .19),
ADFDM (r = .18), and ADLDM (r = .17) under DS condition. The study identified
four genotypes with high kernel and haulm yields, and six genotypes with high oleic
acid content. Further, 10 genotypes were selected with relatively better drought tolerance.
The selected genotypes are recommended for further breeding and variety
release adapted to drought conditions.
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