期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Intraspecific genetic variability,differentiation and evolutionary relationships revealed through microsatellite loci in seven economically important Calamus species
1
作者 Binoy Kurian A.S.Hemanthakumar +7 位作者 Joemon Jacob Wickneswari Ratnam C.Y.Choong Prabalee Sarmah S.Shefeek Vishnu V.Nair s.v.sajithkumar K.K.Sabu 《Journal of Forestry Research》 SCIE CAS CSCD 2020年第5期1899-1911,共13页
Population density,species richness and critical population parameters are crucial in determining the levels of gene diversity in dioecious species of the genus Calamus.The extent of intraspecific and intrageneric gen... Population density,species richness and critical population parameters are crucial in determining the levels of gene diversity in dioecious species of the genus Calamus.The 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 species.The heterozygosity of microsatellite loci ranged from zero to 0.78.Average gene diversity within species was 0.13;in all species it was 0.18 and amongst species was 0.06.The Shannon Information Index was the lowest for Calamus metzianus(0.11),whereas it ranged from 0.16 to 0.26 for other species.The expected heterozygosity varied from 0.08 to 0.18.Calamus 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 thwaitesii.Population structuring and phylogenetic analysis differentiated the seven species.Due 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 extinction.This could be important for species such as C.metzianus 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 heterozygosity.Four microhotspots from the Agasthyamalai Biosphere Reserve and the Pushpagiri Wildlife Sanctuary may be possible for long-term conservation programs.The findings of this study lay a strong foundation for strengthening protected area networks,especially areas with intermediate levels of disturbance. 展开更多
关键词 Genetic diversity DIFFERENTIATION Population structure Conservation Microsatellites Calamus spp
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部