Articles
Deep insight into cultivated olive tree diversity, structure and parentage relationships in Spain
Article number
1446_11
Pages
81 – 88
Language
English
Abstract
Several decades ago, prospecting surveys estimated that Spain had approximately 260 olive cultivars.
However, recent research conducted in different regions of the country has uncovered previously unknown cultivars, emphasizing the need to recover and characterize the national cultivated germplasm.
To achieve this, a set of 96 EST-SNP markers was used to identify a significant amount of new material that holds particular importance in olive growing areas with low cultivation pressure.
Consequently, the number of distinct genotypes documented in the World Olive Germplasm Bank of IFAPA, Córdoba (WOGBC-ESP046), increased to 427. Additionally, approximately 65 cases of new synonymies and 23 cases of new homonymies were identified.
This represents a 62% increase in the representation of national cultivars, providing a deeper understanding of the diversification scenario and pedigree network.
Structural analysis confirmed the extensive genetic variability of Spanish germplasm, while a new diversity hotspot was observed in the northern regions of La Rioja and Aragon.
Pedigree analysis revealed the influence of a few founder cultivars in the composition of the majority of olive germplasm, particularly in Andalusia.
It also highlighted the significant role of foreign material in the north and the potential impact of local selection in the northeast.
The identification, study of genetic relationships, and pedigree analysis of Spanish olive germplasm, followed by agronomic evaluation, will expand the genetic foundation of breeding programs and enable more efficient utilization of these genetic resources.
However, recent research conducted in different regions of the country has uncovered previously unknown cultivars, emphasizing the need to recover and characterize the national cultivated germplasm.
To achieve this, a set of 96 EST-SNP markers was used to identify a significant amount of new material that holds particular importance in olive growing areas with low cultivation pressure.
Consequently, the number of distinct genotypes documented in the World Olive Germplasm Bank of IFAPA, Córdoba (WOGBC-ESP046), increased to 427. Additionally, approximately 65 cases of new synonymies and 23 cases of new homonymies were identified.
This represents a 62% increase in the representation of national cultivars, providing a deeper understanding of the diversification scenario and pedigree network.
Structural analysis confirmed the extensive genetic variability of Spanish germplasm, while a new diversity hotspot was observed in the northern regions of La Rioja and Aragon.
Pedigree analysis revealed the influence of a few founder cultivars in the composition of the majority of olive germplasm, particularly in Andalusia.
It also highlighted the significant role of foreign material in the north and the potential impact of local selection in the northeast.
The identification, study of genetic relationships, and pedigree analysis of Spanish olive germplasm, followed by agronomic evaluation, will expand the genetic foundation of breeding programs and enable more efficient utilization of these genetic resources.
Publication
Authors
F. Gómez-Gálvez, J. Cano-Rodríguez, I. Lorite, S. Paz-Compañ, J. Ugarte-Andreva, J. García-Rubio, I. Pinilla-Aragón, A. Ninot, J. Viñuales, J. Casanova, Z. atovic, R. de la Rosa, A. Belaj
Keywords
genetic characterization, Olea europaea, EST-SNPs, germplasm collection, pedigree
Online Articles (54)