Vol. 9, Issue 3 (2021)
Genetic variability and diversity study in tuberose (Polianthes tuberosa L.)
Author(s): D Priyanka Gandhi and T Usha Bharathi
Abstract: Twenty seven genotypes of tuberose (Polianthes tuberosa L.) were evaluated for growth, flower and bulb yield parameters at ICAR-Indian Institute of Horticultural Research, Bangalore during the year 2017-18 to assess their genetic variability and diversity. Significant differences among genotypes for all the traits except number of bulblets per clump in single and tepal thickness in double genotypes were observed through analysis of variance. Wide ranges in mean performance of different biometric parameters were recorded for both single and double cultivars of tuberose. High phenotypic coefficient of variation and genotypic coefficients of variation were recorded for number of leaves per clump, spike length, rachis length, weight of single floret, matured bud weight and number of spikes per clump in single tuberose genotypes. High PCV and GCV were observed for number of leaves per clump, duration of flowering, number of spikes per clump and weight of florets per spike were recorded in double tuberose genotypes. High heritability and genetic advance as percent of mean were registered for plant height, number of leaves per clump, duration of flowering, spike length, rachis length, number of florets per spike, weight of single floret, mature bud weight and number of spikes per clump in single and double tuberose genotypes. The genotypes studied were grouped into nine clusters, indicating the presence of wide range of genetic diversity. The maximum numbers of eight genotypes were grouped into cluster IV. The inter cluster distance was noticed maximum (75.98) between the cluster VIII and IX, indicating that the genotypes belonging to these groups were genetically most divergent and the genotypes included in these clusters can be used as parents in hybridization. Cluster IV had the highest mean values for plant height (42.68), duration of flowering (178.70) and spike yield per plant/spikes per clump (3.65) and spike yield per plant contributed the highest (36.75%) towards genetic divergence. The genotypes with superior traits, highest cluster mean can be selected as donor parents in the hybridization programme for development of superior variety.
Pages: 235-240 | 542 Views 166 Downloads
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How to cite this article:
D Priyanka Gandhi, T Usha Bharathi. Genetic variability and diversity study in tuberose (Polianthes tuberosa L.). Int J Chem Stud 2021;9(3):235-240.
