Polylepis multijuga is a threatened, endemic tree species in the northern Andes of Peru. P. multijuga is wind-pollinated which could allow for gene flow among fragments that would counteract drift and loss of genetic diversity. I collected samples from 371 trees in nine forest fragments and genotyped them at 316 AFLP loci. Genetic diversity (H = 0.131) was low compared to other species and genetic differentiation across all fragments was moderate (PhiPT = 0.14). Short distance (5-50m) genetic spatial autocorrelation within most fragments indicated short distance seed dispersal. Pair-wise genetic distance estimates between fragments (range: 0.036 - 0.487) were not related to geographic distance and instead appeared to be related to habitat. The three most differentiated fragments, which also had the lowest genetic diversity values, were two small, high altitude fragments and a fragment located in a deep ravine suggesting that pollen flow does not effectively connect all fragments in this landscape.
| Identifer | oai:union.ndltd.org:TCU/oai:etd.tcu.edu:etd-11092010-122217 |
| Date | 09 November 2010 |
| Creators | Quinteros, Natalia |
| Contributors | Dean Williams |
| Publisher | Texas Christian University |
| Source Sets | Texas Christian University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf, application/octet-stream |
| Source | http://etd.tcu.edu/etdfiles/available/etd-11092010-122217/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to TCU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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