ASSESSMENT OF VARIABILITY IN CHICKPEA GENOTYPES FOR YIELD, DROUGHT TOLERANCE AND MECHANICAL HARVESTABLE TRAITS USING GENETIC DIVERSITY ANALYSIS
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Authors
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R. DIVYA MADHURI*, V. JAYALAKSHMI, M. SHANTHI PRIYA and G. FAREEDA
Regional Agricultural Research Station, Acharya N.G. Ranga Agricultural University, Nandyal-518 503
Keywords:
Genetic diversity analysis, chickpea, machine harvestabilityAbstract
Genetic divergence among thirty chickpea genotypes utilising 19 yield, drought tolerance and mechanical
harvestable traits was studied under rainfed and irrigated conditions. Thirty genotypes were grouped into five
distinct clusters both under rainfed and irrigated conditions, however, the pattern of grouping was different under two
growing conditions. Genetic diversity under rainfed condition was attributed largely to 100 seed weight (33.56 %),
days to 50 % flowering (20.92 %), seed yield per plot (10.34 %) and harvest index (9.89 %). However, under irrigated
condition, the grouping of the genotypes was mainly due to days to maturity (38.8 %) followed by 100 seed weight
(22.76 %) and protein content (10.11 %). Traits related to mechanical harvest and drought tolerance viz., height of
the first pod (5.06 %) and SPAD Chlorophyll Meter Reading (SCMR) (2.07 %) under rainfed; Specific leaf area (SLA)
(6.67 %) and plant height (6.9 %) under irrigated; proline under both rainfed (2.07 %) and irrigated (5.52 %) conditions
also contributed towards genetic diversity to some extent. In rainfed environment, NBeG 868 with high proline
(cluster III) and NBeG 865, ICCV 181602 and ICCV 181664 (Cluster IV ) with higher mean values for height of the first
pod and plant height; MH 14 (Cluster V) with higher yield and superior performance for SCMR, Relative Water
Content (RWC at 30 DAS) with lesser SLA; and in irrigated condition, NBeG 776, NBeG 779, NBeG 780, NBeG 868,
NBeG 49, JG 11 (cluster II); NBeG 865, ICCV 181602, ICCV 181664 (Cluster V) for seed yield and machine
harvestable traits and MH 11, NBeG 47, ICCV 181607 (Cluster IV) with desirable angle of primary branch. RWC at 30
DAS and proline could be chosen to test for their combining ability vis a vis to improve yield, drought tolerance and
machine harvestability in chickpea.
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