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        Genetic diversity and population structure assessment of Hellenia speciosa from Indian agro-ecological regions using inter-simple sequence repeat markers

        Prabhu Kamasamudra N.,Rodrigues Vereena,Kumar Amit,Kumar Manish,Srivastava Sharad,Shukla Ashutosh K.,Sundaresan Velusamy 한국원예학회 2023 Horticulture, Environment, and Biotechnology Vol.64 No.2

        Hellenia speciosa (J. Koenig) S. R. Dutta (Syn: Costus speciosus (J. Koenig) Sm.) is well known for its anti-diabetic proper- ties and is in high demand for its steroidal sapogenin, diosgenin, which is used in the pharmaceutical industry for manufac- turing steroidal drugs. The increasing demand for this plant has led to the depletion of its wild population. This study was conducted to reveal the genetic diversity of H. speciosa collected from various agro-ecological regions of India for use in devising conservational strategies, and cultivation and breeding programs. Twenty inter-simple sequence repeat markers yielded 304 products with 100% polymorphism demonstrating high genetic diversity. Nei′s gene diversity and Shannon information indexes were estimated among the populations as 0.19 ± 0.23 and 0.28 ± 0.25, respectively. High genetic dif- ferentiation ( GST = 0.40) and low gene fl ow ( Nm = 0.74) were observed, which corroborated with the analysis of molecular variance revealing maximum (86.75%) variance within populations. The unweighted pair group method with arithmetic mean analysis grouped all accessions into three major clusters. Principal component analysis showed that the fi rst three compo- nents accounted for 30.66%, 4.54%, and 3.98% variation, respectively, and Bayesian clustering through structure showed the presence of two genetic population (K = 2). This study revealed high genetic diversity among the populations collected from high altitude compared to those from the plain. A positive but low correlation among genetic and geographic distances was obtained ( r = 0.282, p < 0.0001). Identifi cation of genetic diversity and intra population variation of a species are prime factors to take defi ned conservation strategies.

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