INDIAN JOURNAL OF PURE & APPLIED BIOSCIENCES

ISSN (E) : 2582 – 2845

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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2020, Volume : 8, Issue : 1
First page : (252) Last page : (261)
Article doi: : http://dx.doi.org/10.18782/2582-2845.7978

Principal Component Analysis of Quantitative Traits Governing Drought Tolerance in Germplasm Accessions of Green gram [Vigna radiata (L.)]

Kanavi M.S.P.1*, Prakash Koler2, Somu G.3, Nagesha N.4 and N. Marappa5
1Dept. of Genetics and Plant Breeding, 2Dept. Crop Physiology,
College of Agriculture, Hassan, University of Agricultural Sciences, Bangalore, Karnataka
3Assistant Breeder, AICRP on Sorghum, Chamarajanagara,
University of Agricultural Sciences, Bangalore, Karnataka
4Dept. of Plant Biotechnology, 5Dept. of Genetics and Plant Breeding,
College of Agriculture, G.K.V.K, University of Agricultural Sciences, Bangalore, Karnataka
*Corresponding Author E-mail: kanavi.uasb@gmail.com
Received: 11.01.2020  |  Revised: 17.02.2020   |  Accepted: 23.02.2020 

 ABSTRACT

An experiment was conducted to evaluate 200 green gram germplasm accessions along with five check entries for drought tolerance using augmented design during summer 2015 by imposing drought stress condition. Observations were recorded on 17 quantitative traits. ANOVA revealed high significant differences among germplasm accessions for yield, yield component traits and also for drought tolerance traits. Mean squares attributable to ‘Genotypes vs check entries’ were significant for all the traits except seeds per pod and relative water content. Principal component analysis was carried out for 14 variables showing positive correlation with yield. Out of 14 factors generated by PCA, there are only 4 factors with eigenvalues more than or close to one contributing for more than 79.65 % of variability. Among the variables studied, variable proline content (11.91) had highest per cent contribution to the total variability followed by spad chlorophyll meter reading (10.80), leaf water potential (10.75) seeds per pod (9.34), pod length (9.07), relative water content (8.51), harvest index (7.49), specific leaf area (6.31), pods per cluster (6.28), plant height (5.74), pods per plant (3.79) and clusters per plant (1.95). Two variables namely; test weight (0.85) and threshing percentage (0.46) had negligible percentage of contribution to total variability

Keywords:  Green gram germplasm, Drought tolerance screening, Principal component analysis, Biplot analysis

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Kanavi, M.S.P., Koler, P., Somu, G., Nagesha, N., & Marappa, N. (2020). Principal Component Analysis of Quantitative Traits Governing Drought Tolerance in Germplasm Accessions of Green gram [Vigna radiata (L.)], Ind. J. Pure App. Biosci. 8(1), 252-261. doi: http://dx.doi.org/10.18782/2582-2845.7978




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