GENETIC EVALUATION AND DEVELOPMENT OF CORE SET OF KODO MILLET [Paspalum scrobiculatum (L.)] GERMPLASM ACCESSIONS
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2023-02-07
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Abstract
Development of a reduced representative set of a large base collection enables its enhanced use in crop improvement. Considering the size of current kodo millet germplasm (1390 accessions) being maintained at AICRP on Small Millets, ZARS, UAS, GKVK, Bangalore is unwieldy for management, characterization and evaluation hence an attempt was made to develop a core set of kodo millet germplasm. A set of 1390 germplasm accessions along with five check varieties were characterized for 16 qualitative traits and evaluated for 11 quantitative traits in a augmented design during Kharif 2021 at ZARS, UAS, GKVK, Bangalore. Analysis of variance revealed significant mean squares due to germplasm accessions for most of the quantitative traits. Substantial polymorphism for qualitative traits was also evident. Based on grain yield, ten superior kodo millet germplasm accessions were identified which can be further used in kodo millet improvement programmes. A core set was developed using the data on 9 qualitative and 6 quantitative traits of 980 germplasm accessions following heuristic strategies-based approaches. Qualitative traits-based statistics such as ‘class coverage’, and ‘Shannon-Weaver diversity
index’ and Quantitative traits based univariate statistics -mean and variance and standardized multivariate statistics such as SMD%, CR%, VD% and VR% were used to assess the representativeness of core sets. Heuristic approach-based core set of 6.83% consisting of 67 germplasm lines was identified as the best representative of the base collection. This core set is suggested as a priority resource for use in breeding kodo millet.
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