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Int. J. Mol. Sci. 2012, 13(5), 5645-5658; doi:10.3390/ijms13055645
Article

Genetic Diversity of Pinus nigra Arn. Populations in Southern Spain and Northern Morocco Revealed By Inter-Simple Sequence Repeat Profiles

1,††
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2,††
,
2
,
3
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4
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5
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1
 and
1,6,*
1 Department of Agricultural Technology and Science and Genetics, Faculty of Pharmacy, Institute of Botany, University of Castilla-La Mancha, Campus Universitario s/n, Albacete, E-02071, Spain 2 Department of Agricultural Technology and Science and Genetics. ETSIA, University of Castilla-La Mancha, Campus Universitario s/n, Albacete, E-02071, Spain 3 Training Center and Experimental Forestry, Cazorla, E-23470, Spain 4 Faculty of Experimental Sciences, University of Jaén (B3-158), Campus Las Lagunillas, s/n E-23009, Jaén, Spain 5 Department of Physical Systems, Chemical and Natural Sciences, Pablo de Olavide University, Ctra. Utrera km. 1, Sevilla, E-41002, Spain 6 Albacete Science and Technology Park, Campus Universitario s/n, Albacete, E-02071, Spain †† These authors contributed equally to this work.
This article is dedicated to the memory of Dr. Antonio Del Cerro Barja (1952–2010).
* Author to whom correspondence should be addressed.
Received: 13 April 2012 / Revised: 3 May 2012 / Accepted: 7 May 2012 / Published: 10 May 2012
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
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Abstract

Eight Pinus nigra Arn. populations from Southern Spain and Northern Morocco were examined using inter-simple sequence repeat markers to characterize the genetic variability amongst populations. Pair-wise population genetic distance ranged from 0.031 to 0.283, with a mean of 0.150 between populations. The highest inter-population average distance was between PaCU from Cuenca and YeCA from Cazorla, while the lowest distance was between TaMO from Morocco and MA Sierra Mágina populations. Analysis of molecular variance (AMOVA) and Nei’s genetic diversity analyses revealed higher genetic variation within the same population than among different populations. Genetic differentiation (Gst) was 0.233. Cuenca showed the highest Nei’s genetic diversity followed by the Moroccan region, Sierra Mágina, and Cazorla region. However, clustering of populations was not in accordance with their geographical locations. Principal component analysis showed the presence of two major groups—Group 1 contained all populations from Cuenca while Group 2 contained populations from Cazorla, Sierra Mágina and Morocco—while Bayesian analysis revealed the presence of three clusters. The low genetic diversity observed in PaCU and YeCA is probably a consequence of inappropriate management since no estimation of genetic variability was performed before the silvicultural treatments. Data indicates that the inter-simple sequence repeat (ISSR) method is sufficiently informative and powerful to assess genetic variability among populations of P. nigra.
Keywords: Pinus nigra; genetic diversity; populations; ISSR Pinus nigra; genetic diversity; populations; ISSR
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Rubio-Moraga, A.; Candel-Perez, D.; Lucas-Borja, M.E.; Tiscar, P.A.; Viñegla, B.; Linares, J.C.; Gómez-Gómez, L.; Ahrazem, O. Genetic Diversity of Pinus nigra Arn. Populations in Southern Spain and Northern Morocco Revealed By Inter-Simple Sequence Repeat Profiles. Int. J. Mol. Sci. 2012, 13, 5645-5658.

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