SEED CONE ABORTION AND FULL SEED PRODUCTION IN AN INDOOR SEED ORCHARDWITH POTTED GRAFTS OF PICEA-ABIES

Citation
O. Johnsen et al., SEED CONE ABORTION AND FULL SEED PRODUCTION IN AN INDOOR SEED ORCHARDWITH POTTED GRAFTS OF PICEA-ABIES, Scandinavian journal of forest research, 9(4), 1994, pp. 329-332
Citations number
18
Categorie Soggetti
Forestry
ISSN journal
02827581
Volume
9
Issue
4
Year of publication
1994
Pages
329 - 332
Database
ISI
SICI code
0282-7581(1994)9:4<329:SCAAFS>2.0.ZU;2-P
Abstract
Abortion of seed cones and production of full seeds have been recorded in an indoor-potted Norway spruce (Picea abies (L.) Karst.) seed orch ard at Biri nursery in Norway. Seed cone buds aborted their normal dev elopment at much higher frequencies (22-45%) inside isolation bags tha n in an open-air (4-12%) greenhouse environment. The grafts had been i nduced to flower the year prior to seed cone development. Treatment wi th gibberellin A(4/7) in conjunction with heat reduced the proportion of aborted, isolated flowers (13%) compared to treatment with heat alo ne (22%) in a clonally balanced material. The production of full seeds per cone increased from 3 in 1987 to 50 in 1991. The full seed produc tion is discussed in relation to methods and timing of pollen forcing. It is anticipated that 1 kg of seeds could be produced annually in a 1250 m(2) greenhouse.