tailieunhanh - Báo cáo lâm nghiệp:"Lack of allozyme and ISSR variation in the Rare endemic tree species, Berchemia berchemiaefolia (Rhamnaceae) in Korea"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:"Lack of allozyme and ISSR variation in the Rare endemic tree species, Berchemia berchemiaefolia (Rhamnaceae) in Korea" | Ann. For. Sci. 60 2003 357-360 INRA EDP Sciences 2003 DOI forest 2003026 357 Original article Lack of allozyme and ISSR variation in the Rare endemic tree species Berchemia berchemiaefolia Rhamnaceae in Korea Seok-Woo Lee Yong-Mo Kim and Won-Woo Kim Korea Forest Research Institute 44-3 Omokchun-dong Kwonsun-ku Suwon 441-350 Republic of Korea Received 4 February 2002 accepted 24 June 2002 Abstract - Rare plant species are commonly hypothesized to have little genetic variation because of genetic drift strong and directional selection toward genetic uniformity in a limited number of environments inbreeding depression and or other factors. We investigated genetic variation in Berchemia berchemiafolia a rare and endangered tree species worldwide by examining 14 allozyme loci and 28 I-SSR amplicons in 111 individuals distributed among four populations in Korea. No allozyme and I-SSR variation were detected with the exception of one variant from one individual at Pgi-2 locus. A substantial genetic bottleneck accompanying the fluctuation of local population size caused by repeated human activities and inbreeding could account for this species lack of genetic variation. Berchemia berchemiaefolia rare tree no variation allozyme I-SSR Résumé - Absence de variabilité d allozyme et ISSR chez les espèces d arbres rares et endémiques Berchemia berchemiaefolia- Rhamnacée en Corée. On fait en general l hypothese que les espèces rares ne disposent que d une faible variabilité génétique pour differentes raisons derive génétique forte selection dans le sens de l uniformite dans un nombre limité de milieux depression due à la consanguinité et divers autres facteurs. Nous avons étudié la variabilité génétique de Berchemia berchemiaefolia espèce rare et en voie de disparition au niveau mondial en examinant 14 loci d allozyme et 281-SSR amplicon pour 111 individus provenant de quatre populations coréennes. Aucune variabilité d allozyme et d ISSR n a pu être détectée à l exception