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Intraspecific genetic variability,differentiation and evolutionary relationships revealed through microsatellite loci in seven economically important Calamus species

引用

Journal of Forestry Research 2020年第5期31卷 1899-1911页

作者： Binoy Kurian A.S.Hemanthakumar Joemon Jacob Wickneswari Ratnam C.Y.Choong prabalee sarmah S.Shefeek Vishnu V.Nair S.V.Sajithkumar K.K.Sabu Jawaharlal Nehru Tropical Botanic Garden and Research Institute(JNTBGRI) PalodeThiruvananthapuramKerala 695562India Universiti Kebangsaan Malaysia 43600 BangiSelangorMalaysia Assam Agricultural University JorhatAssam 785013India

Population density,species richness and critical population parameters are crucial in determining the levels of gene diversity in dioecious species of the genus *** extent of intraspecific and intrageneric genetic variability in Calamus from the southern Western Ghats of India was studied using 26 microsatellite markers by sampling 227 individuals belonging to seven economically important *** heterozygosity of microsatellite loci ranged from zero to *** gene diversity within species was 0.13;in all species it was 0.18 and amongst species was *** Shannon Information Index was the lowest for Calamus metzianus(0.11),whereas it ranged from 0.16 to 0.26 for other *** expected heterozygosity varied from 0.08 to *** hookerianus and Calamu travancoricus showed the highest genetic differentiation(44%)revealed through Fst values,whereas the lowest(22%)was observed between Calamus gamblei and Calamu *** structuring and phylogenetic analysis differentiated the seven *** to overexploitation and loss of rare alleles,small populations could lead to fertilization between closely related individuals,resulting in inbreeding and increasing the risk of *** could be important for species such as *** where allelic polymorphism was 23%,whereas for all other species it was 38%to 46%.Genetic diversity“micro-hotspots”were identified from the protected area network of the southern and central Western Ghats with highest observed *** microhotspots from the Agasthyamalai Biosphere Reserve and the Pushpagiri Wildlife Sanctuary may be possible for long-term conservation *** findings of this study lay a strong foundation for strengthening protected area networks,especially areas with intermediate levels of disturbance.

关键词： Genetic diversity Differentiation Population structure Conservation Microsatellites Calamus spp

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