Genetic divergence and stability studies in fenugreek (Trigonella foenum-graecum L.)
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Date
2018
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CCSHAU
Abstract
An investigation entitled “Genetic Divergence and Stability Studies in Fenugreek (Trigonella
foenum-graecum L.)” was carried out with sixty genotypes during Rabi season of 2015-16 & 2016-17 at
Vegetable Research Farm, CCS Haryana Agricultural University, Hisar. The Crop was planted on six
dates of sowing as the test environments. The analysis of variance of the twelve characters recorded
significant genotypic differences in all the six environments. This variation was amply demonstrated by
the estimates of variability parameters and close relationships between phenotypic and genotypic
coefficient of variation in most of the characters studied. High heritability and high GCV were observed
for seed yield, pods per plant and plant height shows additive gene action. On the basis of D2 values,
genotypes were classified into eight clusters and results revealed that there was no association between
clustering pattern and eco-geographical distribution of genotypes. Traits seed yield, seed vigour-II, pods
per plant and seed germination contributed maximum toward the divergence. The genotypes of cluster
VIII showed maximum genetic distance with cluster IV, III and II and genotypes of these clusters may be
selected for hybridization for generating genetic variability. The joint regression analysis for G x E
interaction exhibited significant variances due to environments and their interaction and subsequent
breakup of G x E interaction indicated the importance of both linear and non-linear components.
Genotype differed in performance, stability behaviour and response to change in environments, whereby
no single genotype was found outstandingly stable for all the characters studied. The sixty genotypes
were categorized for poor, average and better environments. The high performing and stable genotype
HM-346-1, HM 444, AM 300 and AM 301 was responsive to better environment; RM 191 to the poor
environment; HM 355, AM 304, NDM 67 and NDM 74 to average environment. Likewise, other
promising genotypes HM 57, HM 346, NDM 61, JFg 13, HM 273 and RM 18 were also suggested to be
exploited through hybridization or other breeding approaches so that production potential of fenugreek
could be improved.
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