ISHS Acta Horticulturae 474: III International Symposium on Olive Growing
PRELIMINARY RESULTS ON CLONAL AND SANITARY SELECTION OF OLEA EUROPAEA L.CV. 'SANTULHANA' IN NORTH-EAST OF PORTUGAL |
| Authors: | F. Leitao, J.F. Serrano, M. Fatima Potes, M. Ivone Clara, M. Rosario Felix, F. Rei, J. Lopes |
| Keywords: | Olea europaea, clonal, sanitary, selection |
| Abstract:
O. europaea L. 'Santulhana' is a cultivar grown in the north-east of Portugal and is used both as a table olive and for oil extraction. A clonal and sanitary selection programme for this cultivar was initiated late in 1995. Six different sites (olive orchards) were chosen, within the area where the cv. is most widespread, and 10 to 15 trees per site were marked, totalling 80 trees. These trees were individually studied regarding (i) analysis for the presence of virus, as determined by mechanical inoculation of fruit and/or leaf extract onto herbaceous indicator plants and by immunoenzimatic tests, using antibodies for each of three nepoviruses (strawberry latent ringspot, cherry leaf roll, arabis mosaic) and one cucumovirus (cucumber mosaic) known to infect olive plants, and (ii) total yield. In addition, determinations were made in 50 fruit samples taken from each tree on (iii) average weight per fruit, and per stone, and (iv) flesh/stone ratio. Combined results obtained on virus testing, showed infection levels near 40%. Soft wood cuttings were taken in February 1997, from virus-free trees, for rooting in a warm mist chamber. Preliminary data showed variations on rooting ability of this cv., with 21% as the highest rooting value observed. Concerning yields per tree recorded in 1996, they varied from 0 to 56 Kg. Averages for fruit weight ranged from 4.2 to 6.8 g, for stone weight from 0.73 to 1.09 g and flesh/stone ratio varied from 4.2 to 6.5. These studies will be continued for one more year, after which clones will be chosen and instaled in the field for comparative assays. | |
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