Genetic analysis and conservation of the endangered Canary Island woody sow-thistle, Sonchus gandogeri (Asteraceae) |
| |
Authors: | S. -C. Kim C. Lee A. Santos-Guerra |
| |
Affiliation: | (1) Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA;(2) Jardín de Aclimatación de La Orotava, Calle Retama Num. 2, 38400 Puerto de La Cruz, Tenerife, Canary Islands, Spain |
| |
Abstract: | Sonchus gandogeri, a woody sow-thistle, is an endangered Canary Island endemic with only two known populations, one in the El Golfo and another in the Las Esperillas of El Hierro. Amplified fragment length polymorphism (AFLP) markers were used to assess the genetic variation within and among populations. The mean genetic diversity of two populations was estimated to be 0.380, and the El Golfo population (0.380) had higher genetic diversity than the southeastern one (0.268). The unbiased Neis genetic identity between the two populations was 0.846. The mean genetic diversity of S. gandogeri was much higher than that of the other endangered plant species. This is perhaps due to breeding system, life form, extinction, and/or introgressive hybridization and hybrid origin of the taxon. This study also indicates that the two populations are not strongly differentiated (GST=0.149). This study suggests that S. gandogeri is more likely to become extinct due to environmental or demographic forces than genetic factors, such as inbreeding depression. More strict control of introduced herbivores is necessary to protect these populations, and germplasm collection for ex situ conservation is needed. |
| |
Keywords: | AFLP Canary archipelago Conservation genetics Endangered species Genetic variation Sonchus gandogeri |
本文献已被 PubMed SpringerLink 等数据库收录! |
|