Inheritance of bud-set and bud-flushing in Picea abies (L.) Karst |
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Authors: | G Eriksson I Ekberg I Dormling B Matérn D von Wettstein |
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Institution: | (1) Department of Forest Genetics, the Phytotron and Department of Forest Biometry, Swedish University of Agricultural Sciences, Uppsala and Stockholm, Sweden;(2) Department of Physiology, Carlsberg Laboratory, Copenhagen, Denmark |
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Abstract: | Summary Diallel crosses were made between clones of a French and a Swedish provenance of Picea abies. The former is characterized by a long critical night length for bud-set and a late flushing of the buds; the latter by a short critical night length for bud-set and an early flushing of the buds. The F1 hybrid seedlings and their French and Swedish intraprovenance half-sibs were tested over three growth periods in the phytotron at the College of Forestry, Stockholm. In comparison with intraprovenance half-sibs, the hybrid progenies gave, on average, an intermediate response for the photoperiodic control over budset and for the temperature requirements for bud-flushing. This indicates the prevalence of additive action of multiple factors in the determination of the photoperiodic and temperature response. However, individual interprovenance hybrid progenies revealed a range of responses, and in certain combinations the response of these hybrids and their intraprovenance half-sibs coincided. By selection of suitable parents, interprovenance crosses can be used to produce hybrids with desired photoperiodic characteristics and temperature requirements.With gratitude and appreciation we dedicate this paper to Åke Gustafsson at the occasion of his 70th birthday, April 8, 1978 |
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Keywords: | Critical night length Photoperiodism Bud-flushing Temperature requirements Provenance crosses General and specific combining ability Breeding values |
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