کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4400166 1618547 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rapid genetic identification of local provenance seed collection zones for ecological restoration and biodiversity conservation
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Rapid genetic identification of local provenance seed collection zones for ecological restoration and biodiversity conservation
چکیده انگلیسی

SummaryThe ecological restoration of native plant communities requires the collection of large amounts of seed. Use of non-local provenance seed can have detrimental consequences for the success of restoration if there is a home-site advantage, and for nature conservation through the erosion of natural patterns of population genetic structuring and/or genetic swamping (and extirpation) of locally significant genotypes. As part of an ongoing project to genetically delineate local provenance seed collection zones for species within a large urban bushland remnant of high conservation value, we assessed population genetic differentiation in two widespread coastal leguminous species, Acacia rostellifera and A. cochlearis   (Fabaceae), commonly used in restoration programmes in SW Australia. Using amplified fragment length polymorphism (AFLP), we found very high levels of genetic differentiation among populations, with an analysis of molecular variance (AMOVA) showing more than 50% of the total genetic variance to be partitioned among populations (ΦST=0.58ΦST=0.58 and 0.51 for A. rostellifera and A. cochlearis, respectively), and marked non-overlap of almost all potential seed source populations from the local population in ordinations. Our results suggest extremely restricted natural dispersal among populations, possibly due to a combination of low seed set, seed dispersal by ants, clonality, a linear distribution of naturally fragmented populations and possibly low outcrossing rates. We suggest a narrow seed collection zone should be applied to these species for the conservation of genetic diversity and natural patterns of population genetic structure, and we highlight the value and importance of provenance evaluation to ecological restoration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal for Nature Conservation - Volume 14, Issues 3–4, 20 September 2006, Pages 190–199
نویسندگان
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