Genetic Divergence and Path Analysis in Fenugreek (Trigonella foenum-graecum L.)
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Date
2007
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Publisher
MPUAT, Udaipur
Abstract
The present study entitled as “Genetic Divergence and Path Analysis in
fenugreek (Trigonella foenum-graecum L.)” was carried out with 20 diverse
genotypes/strains of fenugreek collected from different sources. The material were
planted during two crop seasons viz. rabi, 2007-08 and 2008-09 at Instructional Farm
of Rajasthan College of Agriculture, Udaipur. The experiment was conducted in
Randomized Block Design with three replications following uniform and
recommended agronomic practices. Observations were recorded for 11 yield
contributing characters and seed protein content in each year.
Variability parameters, correlation were computed for each year while path
analysis was estimated for seed yield per plant as well as seed protein content for each
year. Genetic divergence was computed for seed yield per plant over pooled basis
using Mahalanobis (1936) D2 statistics and protein profile were distinguished through
SDS-PAGE by Davis (1964).
Analysis of variance showed presence of sufficient variability among the
genotypes. Superior varieties/strains viz. NS 2006-3, UM-134, UM-353 and NS 2006-
1 were identified on the basis of their high per se and consistent performance for seed
yield and most of their component characters. Varieties/strains NS 2006-3 displayed
superiority for seed yield as well as seed protein content. Plant height, pods per plant
and pod length turned out to be the most important contributing traits for enhancing
yield level in fenugreek. High GG along with high estimates of heritability and GCV
for seed protein content and biological yield per plant. While, moderate GG and GCV
with high heritability for pods per plant, seed yield per plant and plant height
suggested for these traits would be effective for genetic improvement of seed yield in
fenugreek.
Association studied revealed that seed yield per plant showed positive
correlated with plant height, branches per plant, biological per plant and harvest index
at genotypic and phenotypic level in at least one year and over pooled basis. Most of
these characters were mutually correlated. Path analysis studied for seed yield
revealed direct and indirect contribution of plant height, pods per plant, biological
yield per plant, seeds per pod and pod length while for seed protein content it revealed
direct as well as indirect contribution of seed yield per plant, harvest index and seeds
per pod. These characters showed strong association with seed yield and seed protein
content
On the basis of divergence studied, it was concluded that there was no
relationship between genetic and geographic diversity. These 20 varieties/strains were
grouped into 9 clusters. Maximum inter-cluster distance was between cluster VI and
IX and genotypes of these clusters with high per se performance could be utilized in
breeding programmes. Character contributing maximum to seed yield were branches
per plant, 100-seed weight and harvest index. Genetically diverse and high yielding
varieties/strains of fenugreek like RMt-1, RMt-305, NS 2006-3, UM-134 and UM-
353 could be used for breeding programme so as to ameliorate the productivity and
quality of fenugreek. In protein profiling the dendrogram is used for cluster analysis
based on UPGMA method. These 20 varieties/strains were grouped into 3 clusters.
The distance coefficients generated between the 20 fenugreek genotypes ranged from
0.00 to 4.29. Maximum distance was recorded between G1 (NS 2006-1) and G4 (NS
2006-4) genotypes of these stages with high genetic divergent as well as per se
performance could be utilized in future breeding programme.
Description
Genetic Divergence and Path Analysis in Fenugreek
(Trigonella foenum-graecum L.)
Keywords
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Citation
Swami and Maloo, 2007