G × E INTERACTION AND PHENOTYPIC STABILITY ANALYSIS USING GGE BIPLOT AND AMMI MODELS IN LINSEED (Linum usitatissimum L.)
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Date
2019-05-30
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CSKHPKV, Palampur
Abstract
The present investigation entitled “G × E interaction and phenotypic stability analysis using GGE biplot and AMMI models in linseed (Linum usitatissimum L.)” was undertaken during rabi 2017-18 at the Experimental farm of the Department of Crop Improvement, CSK HPKV, Palampur and three research stations namely, Rice and Wheat Research Centre (RWRC) Malan, Shivalik Agricultural Research and Extension Centre (SAREC) Kangra and Hill Agricultural Research and Extension Centre (HAREC) Dhaulakuan of CSK HPKV, Palampur. Thirty linseed genotypes comprising 16 advanced breeding lines, 11 released varieties and three exotic collections were grown in alpha design, with the objective to estimate genotype × environment (GE) interaction effects and identify the stable linseed genotypes for yield and component traits over wide range of environments. Data were recorded on various yield and attributing characters and reaction to diseases i.e. powdery mildew and rust. The data analysis was done as per the standard statistical procedures. The analysis of variance for each environment showed significant differences among the genotypes for all the characters studied. The pooled analysis of variance as per AMMI and GGE analysis revealed significant differences among the genotypic, environmental and G × E interaction effects for all the characters studied, indicating presence of sufficient variability among the genotypes and environments as well as differential response of genotypes in different environments for these traits. G × E interaction was divided into first three principal components, of which all of them were significant for all the characters. The first two principal components were able to explain more than 70 per cent of the variation by genotypes and G × E interaction, they provided good approximation for interpretation of the biplots. On the basis of AMMI and GGE biplots, KL-241, KL-263 and Surbhi were high yielding and most stable genotypes. For fibre yield per plant genotypes KL-284, KL-269 and KL-227 were stable for fibre yield per plant. The genotypes KL-280, KL-236 and Him Alsi-2 were having higher seed yield per plant in environment Palampur-I and Kangra than the average in other environments whereas, the genotypes KL-219, Bhagsu and Giza-8 in environments Palampur-II and Malan; KL-263 and Surbhi in environment Dhaulakuan, the farmers can grow these genotypes at its relevant environment to get maximum benefit. Environments Dhaulakuan and Kangra were having highest representativeness to discriminate the genotypes for fourteen and eleven characters out of sixteen on the basis of their performance. Hence, these environments can be useful for selecting the stable genotypes during breeding programmes. Five genotypes viz., KL-241, KL-263, KL-285, Jeewan and Nagarkot were found to be resistant to powdery mildew as well as rust under natural epiphytotic conditions. Genotypes KL-241 and KL-263 were found to be best genotypes for most of the economic traits as well as resistant to powdery mildew and rust.
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