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Morphological, ecological and genetic variability of Lavandula luisieri (Rozeira) Rivas-Martínez in central eastern Portugal

Published online by Cambridge University Press:  05 March 2010

Fernanda Delgado ,
Sílvia Ribeiro ,
Álvaro Alves ,
Eliseu Bettencourt  and
Sónia Dias
Fernanda Delgado*
Affiliation:
Escola Superior Agrária do Instituto Politécnico de Castelo Branco, Quinta da Senhora de Mércules, Apartado 119, 6000-909 Castelo Branco, Portugal
Sílvia Ribeiro
Affiliation:
Departamento de Protecção de Plantas e de Fitoecologia, Instituto Superior Agronomia, Lisbon, Portugal
Álvaro Alves
Affiliation:
Escola Superior Agrária do Instituto Politécnico de Castelo Branco, Quinta da Senhora de Mércules, Apartado 119, 6000-909 Castelo Branco, Portugal
Eliseu Bettencourt
Affiliation:
Genetic Resources, Ecophysiology and Plant Breeding Unit, Instituto Nacional dos Recursos Biológicos, I.P., Quinta do Marquês, 2784-505 Oeiras, Portugal
Sónia Dias
Affiliation:
Bioversity International, Via dei Tre Denari, 472/a, 00057 Rome, Italy
*
*Corresponding author. E-mail: [email protected]
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Abstract

The morphological characterisation and data analysis of germplasm accessions of wild Portuguese Lavandula luisieri (Rozeira) Rivas-Martínez from the southern Beira Interior region of central eastern Portugal are described. The study, based on seeds and cultivated plants, was conducted in 2005, 2006 and 2008 among populations selected from four sites (I, II, III and IV). Quantitative and qualitative phenotypic data relating to a set of 35 morphological traits were analysed using canonical discriminant analysis. Genetic similarity among accessions was assessed using amplified fragment length polymorphism molecular markers. The traits contributing most to the variability among studied populations were related to plant density, leaf colour, seed weight and various spike and flower characteristics. Plant populations from each of the four test sites were statistically distinct, exhibiting unique characteristics when compared with one another; however, populations from Sites II, III and IV showed greater genetic similarity and differed substantially from the population of Site I. Altitude and temperature were found to be the most significant environmental variables influencing plant traits, yet the morphological variability of L. luisieri was also influenced by soil pH levels, suggesting that the expressed variability is not only a result of genetic characteristics but also of existing ecological conditions.

Keywords

ecologygenetic diversityLavandula luisierimorphological traitsvariability
Type
Research Article
Information
Plant Genetic Resources , Volume 8 , Issue 1 , April 2010 , pp. 82 - 90
Copyright
Copyright © NIAB 2010

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