Genesis of Grain Yield in Buckwheat(Fagopyrum Esculentum Moench)with a Special Attention to the Low Seed Set
This paper reviews five years of research conducted in Belgium on the genesis of the low grain yield in buckwheat(Fagopyrum escultentum cv．“La Harpe)．Detailed observations were made on the evolution of flowers during the whole flowering period in field trials and under controlled conditions. Treatments involved different times of sowing, seeding rate and defoliation rates, modifications offlower numbers(removal of entire inflorescences or racemes), hand pollinations, honeybee pollination, appfication of osmotic stress, comparison among different photoperiod regimes). The morphogenesis ofthe inflorescences was examined. The genesis of seed numbers appeared to be very much affected by drastic reductions of flower numbers that occur soon after full display of the corolla whatever the position of the flower and the time of its appearance in the raceme．Seed set remained low for all thetreatments applied and the environmental conditions tested even if no pollen transfer limitation was detected．Position of a raceme had a higher effect on flower number than on seed set．Relation to environmental stress occurring at well defined critical stages is unlikely．, The causes of this low seed set remain unclear but appear to be due to the flowers themselves, as poor fertility could be due to abnormalities of ovaries and／or anthers．
Buckwheat Defoliation Honeybees Pollination Seed set Osmotic stress
V.Cawoy B.Halbrecq A.L.Jacquemart S.Lutts J.M.Kinet J.F.Ledent
Faculty of Bio-engineering, Agronomy and Envimnment, Faculty of Sciences, Unité de Biologie Végétale Faculty of Bio-engineering, Agronomy and Envimnment, Unité dEcophysiologie et dAmélioration Végéta Faculty of Bio-engineering, Agronomy and Envimnment, Unitéde Génétique, Croix du Sud2 bte 14
国际会议
The 10th International Symposium on Buckwheat(第十届国际荞麦会议)
陕西杨凌
英文
111-119
2007-08-14（万方平台首次上网日期，不代表论文的发表时间）