Title: Genetic diversity, mating system, and conservation of a Mexican subalpine relict, Picea mexicana Martínez
Author: Ledig, F. Thomas; Hodgskiss, Paul D.; Jacob-Cervantes, Virginia;
Source: Conservation Genetics 3:113-122
Publication Series: Miscellaneous Publication
Description: Mexican spruce (Picea mexicana Martínez), an endangered species of the highest sky islands in México’s Sierra Madre Oriental and Sierra Madre Occidental, is threatened by fire, grazing, and global warming. Its conservation depends on whether it also is threatened by inbreeding and loss of genic diversity. We used 18 isozyme markers in 12 enzyme systems to assay genic diversity, characterize the mating system, and test for recent bottlenecks in three known populations. Unbiased, expected heterozygosity (He) averaged 0.125. Despite a separation of 676 km between populations in the Sierra Madre Oriental and the Sierra Madre Occidental,Wright’s FST, the proportion of total genic diversity among populations, was only 6.9%. Nei’s genetic distance was 0.001 between the populations in the Sierra Madre Oriental and more than an order of magnitude greater, 0.019, between the Sierra Madre Oriental and Sierra Madre Occidental.
Keywords: Bottlenecks, endangered species, fragmentation, global warming, isozymes
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Ledig, F. Thomas; Hodgskiss, Paul D.; Jacob-Cervantes, Virginia 2002. Genetic diversity, mating system, and conservation of a Mexican subalpine relict, Picea mexicana Martínez. Conservation Genetics 3:113-122
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility