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GENETIC DIVERSITY STUDIES IN FENUGREEK (Trigonella foenum-greacum L.)

KrishiKosh

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Title GENETIC DIVERSITY STUDIES IN FENUGREEK (Trigonella foenum-greacum L.)
 
Creator JYOTI PATIL
 
Contributor Dr. S.S.VIJAYAPADMA
 
Subject genetic variability and divergence , correlation and path analysis, PCV and GCV
 
Description A field experiment was conducted to estimate the genetic variability and divergence in fenugreek and to carry out correlation and path analysis. Twenty five genotypes were sown in a randomized block design with three replications during rabi 2013-2014 at College of Horticulture, Rajendranagar, Hyderabad. The objective of the experiment was to identify divergent genotypes to be used as donor parents in hybridization programmes. Observations were recorded on 18 quantitative characters.
The analysis of variance revealed significant differences between genotypes indicating presence of sufficient amount of variability in all the characters studied. Wide range of variability was observed for plant height, number of pods per plant, seed yield and harvest index indicating the scope for selection of suitable initial breeding material for further improvement.
On the basis of the mean performance the genotypes L-14, L-15, L-3 and L-17 were identified as promising lines for further crop improvement in fenugreek.
High PCV and GCV were recorded in dry weight of the plant and number of pods per plant indicating the existence of wider genetic variability for these traits in the genotypes under study and showing ample scope for selection of these characters.
High heritability coupled with high genetic advance as per cent of mean was observed in plant height, number of primary branches, fresh weight of the plant, dry weight of the plant at harvest, number of pods per plant, hundred seed weight and harvest index indicating contribution of additive genes in the expression of these traits. Therefore improvement in these characters can be done through direct selection to select better genotypes for fenugreek.
Correlation coefficient analysis indicated significant positive association of seed yield with number of pods per plant, fresh weight of the plant, dry weight of the plant, harvest index and seed yield per plot. Direct selection based on these traits could result in simultaneous improvement of characters and seed yield in fenugreek.
Path coefficient analysis showed that the character, seed yield per plot followed by harvest index, dry weight of the plant, days to 50% flowering, plant height and number of primary branches exhibited high positive direct effect on seed yield. This suggested that direct selection based on these traits will be rewarding for yield improvement.
Based on Mahalanobis D2 analysis, fenugreek genotypes were grouped into six clusters with maximum of 17 genotypes in cluster I followed by 4 genotypes in cluster II and cluster III, IV, V and VI having one genotype in each.
Genetic diversity analysis revealed that maximum intra-cluster distance was shown by cluster I and minimum in cluster II. The maximum inter cluster distance was observed between cluster VI and III and minimum between cluster V and III. Therefore, the genotypes belonging to cluster I and clusters VI and III may be undertaken in a hybridization programme for getting good segregants.
In conclusion, superior genotypes viz., L-14, L-15, L-3 and L-17 can be used in breeding programmes through either pureline or mass selection methods or hybridization for the development of superior fenugreek varieties for commercial cultivation. It is emphasized to lay attention on the traits viz., plant height, number of pods per plant, seed yield and harvest index in crop improvement programme of fenugreek in future.
 
Date 2016-07-26T11:31:15Z
2016-07-26T11:31:15Z
2014-07
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69888
 
Language en
 
Format application/pdf
 
Publisher Dr. Y.S.R. HORTICULTURAL UNIVERSITY