Evidence is presented suggesting that genetic selection could be an important factor in avocado fruitlet abscission. ‘Ettinger’ embryos (Persea americana Mill.) at different stages of fruit development were classified according to their leucine aminopeptidase (LAP) electrophoretic pattern in the Lap-2 locus. Analysis of several fruitlet populations showed significant deviations from the expected Mendelian ratio. The genotypic ratios at the different stages indicate genetic selection during fruitlet abscission.
Received for publication 30 Sept. 1985. Contribution from the Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan, Israel. No. 1538-E, 1985 series. This work was supported by grant No. 1-625-83 from the United States-Israel Binational Agricultural Research and Development Fund (BARD). We thank R. Elbazri for her expert technical assistance. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.