Table of Contents
ISRN Agronomy
Volume 2012 (2012), Article ID 154723, 6 pages
http://dx.doi.org/10.5402/2012/154723
Research Article

Incompatibility Alleles in Portuguese Hazelnut Landraces

1Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal
2Institut de Recerca i Tecnologia Agroalimentàries, IRTA-Mas de Bover, 43120 Constantí, Spain
3Centre for the Research and Technology of Agro-Environmenta and Biological Sciences, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal
4Institute for Biotechnology and Bioengineering, Centre of Genomics and Biotechnology, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal

Received 13 April 2012; Accepted 23 May 2012

Academic Editors: T. Koba, C. Magill, and L. Parisi

Copyright © 2012 Sandra Martins et al. 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.

Abstract

In many higher plants, selffertilization and genetically related individuals are prevented by pollen-stigma incompatibility. In the genus Corylus, incompatibility is of the sporophytic type and controlled by a single locus with multiple alleles. The objective of this study is to identify the S-alleles present in a collection of Portuguese landraces in order to select the most appropriate landraces for establishment of future orchards and for breeding programmes. Ten major Portuguese hazelnut landraces were submitted to controlled pollinations in the field, with 18 genotypes whose S-alleles are known. The pollen tubes were observed at 100X under a florescence microscope to evaluate their development. Three landraces were revealed to have 𝑆 2 allele, two have 𝑆 5 , and four have one of the 𝑆 3 , 𝑆 5 , 𝑆 1 0 , and 𝑆 1 8 alleles. One landrace was compatible with the 18 S-alleles tested and for two landraces, it was possible to identify both alleles. The information of the self-incompatibility relationship between these old cultivars is obviously useful for selecting the most suitable pollinators for planning new orchards and for new cultivars development.