Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central Chile

The objective of the present study was to analyze levels and distribution patterns of isozyme variation in the only five known populations of Legrandia concinna, a threatened and range-restricted species to the temperate forest of the Chilean South Central Andes. Six enzyme systems were resolved usi...

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Autores principales:	Martínez Araneda,Camila, Premoli,Andrea C, Echeverría,Cristian, Thomas,Philip, Hechenleitner,Paulina
Lenguaje:	English
Publicado:	Universidad Austral de Chile, Facultad de Ciencias Forestales 2011
Materias:	isozyme rare species restricted gene flow vulnerable species
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002011000100004
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spelling	oai:scielo:S0717-920020110001000042011-05-17Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central ChileMartínez Araneda,CamilaPremoli,Andrea CEcheverría,CristianThomas,PhilipHechenleitner,Paulina isozyme rare species restricted gene flow vulnerable species The objective of the present study was to analyze levels and distribution patterns of isozyme variation in the only five known populations of Legrandia concinna, a threatened and range-restricted species to the temperate forest of the Chilean South Central Andes. Six enzyme systems were resolved using a combination of two buffer solutions which yielded information on nine putative loci; 67 % of these were polymorphic in at least one population. Levels of genetic variation for L. concinna populations are low, with average polymorphism of 31 %, and observed and expected heterozygosis of 0.07 and 0.11 respectively. We found significant mean within-population inbreeding (F IS = 0.395) and among-population divergence (F ST = 41 %). Cluster analysis indicates that genetic diversity is latitudinally structured. Our results show that even small populations may still retain as much genetic diversity as larger ones, which, in addition to significant restrictions for gene flow, call for urgent conservation actions; otherwise L. concinna could be seriously threatened.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.32 n.1 20112011-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002011000100004en10.4067/S0717-92002011000100004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	isozyme rare species restricted gene flow vulnerable species
spellingShingle	isozyme rare species restricted gene flow vulnerable species Martínez Araneda,Camila Premoli,Andrea C Echeverría,Cristian Thomas,Philip Hechenleitner,Paulina Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central Chile
description	The objective of the present study was to analyze levels and distribution patterns of isozyme variation in the only five known populations of Legrandia concinna, a threatened and range-restricted species to the temperate forest of the Chilean South Central Andes. Six enzyme systems were resolved using a combination of two buffer solutions which yielded information on nine putative loci; 67 % of these were polymorphic in at least one population. Levels of genetic variation for L. concinna populations are low, with average polymorphism of 31 %, and observed and expected heterozygosis of 0.07 and 0.11 respectively. We found significant mean within-population inbreeding (F IS = 0.395) and among-population divergence (F ST = 41 %). Cluster analysis indicates that genetic diversity is latitudinally structured. Our results show that even small populations may still retain as much genetic diversity as larger ones, which, in addition to significant restrictions for gene flow, call for urgent conservation actions; otherwise L. concinna could be seriously threatened.
author	Martínez Araneda,Camila Premoli,Andrea C Echeverría,Cristian Thomas,Philip Hechenleitner,Paulina
author_facet	Martínez Araneda,Camila Premoli,Andrea C Echeverría,Cristian Thomas,Philip Hechenleitner,Paulina
author_sort	Martínez Araneda,Camila
title	Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central Chile
title_short	Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central Chile
title_full	Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central Chile
title_fullStr	Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central Chile
title_full_unstemmed	Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central Chile
title_sort	restricted gene flow across fragmented populations of legrandia concinna, a threatened myrtaceae endemic to south-central chile
publisher	Universidad Austral de Chile, Facultad de Ciencias Forestales
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002011000100004
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Restricted gene flow across fragmented populations of Legrandia concinna, a threatened Myrtaceae endemic to south-central Chile

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