Genetic variability among the open pollinated progenies of Burma Dek (Melia Composita Benth.) under field conditions
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Date
2022
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Punjab Agricultural University, Ludhiana
Abstract
The present study entitled “Genetic variability among the open pollinated progenies of Burma dek (Melia composita Benth)” was carried out at Regional Research Station, Bathinda during 2020-22, to investigate variation among the progenies for different growth parameters, from an established replicated progeny trial at a spacing of m, data was recorded on growth traits of twenty progenies. Progeny 1 exhibited outstanding performance for the growth parameters like Total height, DBH, straightness, clear bole height and crown length and followed by progeny 2, 19 & 6. Whereas, progeny 3 showed lowest values for these characters. The maximum mean value of number of branches was found in progeny 20. The difference between GCV and PCV was recorded for number of branches and crown length which ranged from 5.711 to 5.631% among the progenies. Majority of parameters studied were less influenced by the environment. In general, low to moderate heritability was observed for all the characters. The heritability varied from 20.950% (Crown Length) to 72.281% (Straightness). High Heritability with high genetic gain was observed for DBH and high heritability coupled with moderate genetic gain was observed for the characters like number of branches (55.862% with 1.591%) and total height (38.792% with 1.116%) among these characters. Path coefficient analysis revealed that the highest positive direct effect was observed in DBH followed by crown length and straightness at genotypic level, while at phenotypic level highest direct effect observed in DBH followed by straightness and number of branches. Highly significant and positive genotypic and phenotypic correlation was observed for majority of the characters. Genotypic correlation coefficient was higher than phenotypic correlation coefficient revealed that the less effect of the environment on the expression of these traits. All the progenies were clustered into five clusters, of which highest inter cluster distance was observed between cluster 2 and cluster 4 which showed as most
divergent clusters. This study will help to identify the most distant accessions and most closely placed ones for breeding experiments to obtain hybrid vigour. Progeny 1 and 2 were promising one on the basis of Index score analysis.
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Karanpreet Kaur (2022) Genetic variability among the open pollinated progenies of Burma Dek (Melia Composita Benth.) under field conditions