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- W2355031643 abstract "Rare and endangered plant Isoetes sinensis is a remnant species of heterosporous lycopsids.The background of spatial structure of genetic variation within populations is helpful to formulate an efficient conservation strategy for threatened species.In this paper,we investigated the spatial distribution patterns of population genetic variation of I.sinensis in Anhui,using allozyme markers.A total of 33 individuals were sampled from Anhui natural population and involved in spatial autocorrelation analysis in two approaches of equal gene frequency and equal distance interval correlograms with eight classes.Seven alleles(Acp-4a、Acp-4c、Mdh-1a、Pgm-2a、Pgm-2b、Pgm-2n and Prx-1a)from 4 polymorphic loci were used to calculate Moran's I spatial autocorrelation coefficient.The result revealed significant spatial structure of genetic variation within population of I.sinensis: the significant positive autocorrelation was found over short distance class 0～24 m,while there were depression and double cline structures in longer distance classes;the large distance classes(69～223 m、389～576 m) in equal gene frequency correlograms and no or few individuals in some distance classes in equal distance interval correlograms suggested island distribution resulting from habitat fragmentation;furthermore,from the distance class 360～432 m,the individuals showed significant negative autocorrelation,which indicated gene exchange was greatly limited from the distance 360 m.The spatial distribution patterns may be attributed to the isolation of small patches,genetic drift and reproductive system.Based on the results of the present study combined with the homogeneous genetic basis detected in allozyme analysis of I.sinensis population,possible mechanisms causing the endangerment of I.sinensis are discussed and conservation strategies are proposed." @default.
- W2355031643 created "2016-06-24" @default.
- W2355031643 creator A5075968808 @default.
- W2355031643 date "2009-01-01" @default.
- W2355031643 modified "2023-09-23" @default.
- W2355031643 title "The Spatial Autocorrelation Study for Genetic Structure in a Isoetes Sinensis Population in Anhui" @default.
- W2355031643 hasPublicationYear "2009" @default.
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