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Germination requirements of nine European Aegilops species in relation to constant and alternating temperatures

Author:
Guzzon, Filippo, Müller, Jonas V., Abeli, Thomas, Cauzzi, Paolo, Ardenghi, Nicola M.G., Balestrazzi, Alma, Rossi, Graziano, Orsenigo, Simone
Source:
Acta botanica Gallica 2015 v.162 no.4 pp. 349-354
ISSN:
2166-3408
Subject:
Aegilops biuncialis, Aegilops geniculata, Aegilops neglecta, Aegilops uniaristata, breeding, ex situ conservation, gene pool, niches, seed germination, temperature, wheat
Abstract:
The genus Aegilops represents the secondary gene pool of wheat. A better understanding of the germination behaviour of Aegilops species is important to improve their use in breeding programmes and strengthen their in situ/ex situ conservation . In this study, we investigated the germination behaviour of nine Aegilops species, five of them not yet investigated, under two alternating and two constant temperatures. Seed germination was higher than 60% in all temperature treatments and species. Alternating temperatures promoted higher germination rates in all the species and significantly enhanced seed germination in three species (Aegilops biuncialis , Aegilops geniculata and Aegilops neglecta), in comparison with constant temperatures. One of the rarest and least productive species in the genus (Aegilops uniaristata) displayed the highest germination. This study suggests that different (seed) regeneration strategies/niches occur across Aegilops species.
Agid:
4666991