PRECOCIOUS MATURING WALNUT POPULATIONS ORGINATING FROM CENTRAL ASIA: THEIR BEHAVIOUR IN FRANCE.

E. Germain, F. Delort, V. Kanivets
The behavior of 873 walnut seedlings from trees originating from Central Asia and growing in the Central Botanical Garden of Kiev (Ukraine), was studied in the South-West part of France.

Observations made near Bordeaux since 1993, have shown that this material presents some unfavorable characters such as an early bud-break and a high susceptibility to bacterial blight. However, these seedlings also possess very unusual characteristics, so far unobserved in European walnut (Juglans regia L.) populations: compact trees with a basitonic tendency, very early flowering sometimes occurring in the year of sowing, protogyny, lateral bud fruitfulness on very short shoots, nuts in clusters, very precocious maturing i.e. as early as the second or third year after planting, high productivity, flowering occurring in successive waves, the flower induction continuing through much of the vegetative season without stopping organogenesis and hermaphrodism of inflorescences in the case of second and subsequent flowerings.

This plant material is very valuable for scientific use such as potential parents in future variety breeding programs, models to go deeper into fundamental studies on reproduction physiology or “bonsai” types to use in the field of ornamental trees.

Germain, E., Delort, F. and Kanivets, V. (1997). PRECOCIOUS MATURING WALNUT POPULATIONS ORGINATING FROM CENTRAL ASIA: THEIR BEHAVIOUR IN FRANCE.. Acta Hortic. 442, 83-90
DOI: 10.17660/ActaHortic.1997.442.10
https://doi.org/10.17660/ActaHortic.1997.442.10

Acta Horticulturae