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Articles

EFFECTS OF INBREEDING ON PRODUCTIVITY IN ALMOND

Article number
912_48
Pages
331 – 335
Language
English
Abstract
Almond breeding programs around the world have similar objectives: self-compatibility, late flowering, good quality, and high productivity.
These common objectives have led to use of the same cultivars and their descendants as progenitors over several generations.
This can produce a high degree of inbreeding and undesirable characteristics in the seedlings.
The effect of self-pollination in four generations of almonds with different inbreeding levels on pollen viability, pollen tube growth, embryo sac development, and fruit set were studied.
Inbreeding effects were observed in some genotypes coming from self-pollination but not in others.
These effects were lower pollen germination rate, slower growth of pollen tubes through the style, delayed and disrupted embryo sac development, and very low fruit set.
This low fruit set seems to be a consequence of endosperm degeneration during fruit development, probably caused by inbreeding.

Publication
Authors
P.J. Martínez-García, E. Ortega, F. Dicenta
Keywords
Prunus dulcis, inbreeding, breeding program, endosperm, fruit set
Full text
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