Selection for fruit removal force and related characteristics in olive breeding progenies
L. León A C , R. de la Rosa A , D. Barranco B and L. Rallo BA CIFA ‘Alameda del Obispo’, IFAPA (Junta de Andalucía), Avda. Menéndez Pidal s/n, Apdo 3092, 14080 Córdoba, Spain.
B Departamento de Agronomía, Universidad de Córdoba, Avda. Menéndez Pidal s/n, 14080 Córdoba, Spain.
C Corresponding author. Email: lorenzo.leon.ext@juntadeandalucia.es
Australian Journal of Experimental Agriculture 45(12) 1643-1647 https://doi.org/10.1071/EA05099
Submitted: 22 March 2005 Accepted: 28 April 2005 Published: 19 January 2006
Abstract
In the present work we discuss the possibility of breeding olives for suitability to mechanical harvesting. Variability in fruit removal force (FRF), and its correlation with fruit weight (FW) and yield were evaluated in reciprocal crosses of ‘Arbequina’, ‘Frantoio’ and ‘Picual’ cultivars. A wide range of variation was observed for FRF among the genotypes evaluated. A high correlation between FRF and FW was observed but not between FRF and yield. Analysis of variance showed significant differences among years but not among female genitors. Differences among genotypes, irrespective of their genitors, were also found, with the variance due to genotype being higher for FRF/FW than for FRF as dependent variable. Correlations of genotype data between years were significant for FRF/FW but not for FRF. The relatively low correlation values indicated that only some negative selection could be done on the basis of FRF/FW at the first stage of the breeding process, owing to the importance of the environmental variability. A more precise evaluation is needed during the successive stages of breeding, where several replicates per genotype are available.
Additional keywords: early selection, mechanical harvesting, Olea europaea.
Acknowledgments
This research was supported by Projects OLI96–2184, CAO97–001-C12–11 and CAO99–008 of the Spanish Ministry of Agriculture, Food and Fisheries.
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