ISHS Acta Horticulturae 470: II International Symposium on Pistachios and Almonds
AUTOGAMY STUDIES ON ALMOND PROGENIES |
| Authors: | F.J. Vargas, J. Clavé, M. Romero, I. Batlle, M. Rovira |
| Keywords: | almond, breeding, progenies, fruit set, autogamy, compatibility |
| Abstract:
During 1995–1997, self-compatibility and autogamy of 1242 seedlings from 22 controlled crosses, using 14 different cultivars, were studied. In each cross, one parent was self-compatible. Around 100 flowers at balloon stage from 2–5 branches in each tree were bagged to prevent cross-pollination. Fruit set was scored 2 months later. Some 44% of the seedlings produced no fruit inside the bags, so they were considered as self-incompatible. The 56% remaining seedlings presented different autogamy levels and were classified in 4 classes according to their percentage of fruit set: very low (<5%), low (5–10%), middle (10–20%) and high (≥20%). Autogamy frequencies of the progenies, including the seedlings with 0% of fruit set, were: 16.9% very low, 8.8% low, 14% middle and 16.7% high. In the progenies ‘Falsa Barese’ x ‘Marcona’ (151 seedlings) and ‘Lauranne’ x ‘Ramillete’ (180 seedlings), 33% and the 27% of the seedlings, respectively, showed a high level of autogamy. Progenies ‘Masbovera’ x ‘Lauranne’ (124 seedlings) and ‘Lauranne’ x ‘Marcona’ (134 seedlings), instead, showed a reduced percentage of seedlings with high level of autogamy, 11% and 6% respectively. | |
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