Studies On The Bulbous Forming Mechanism And Its Breeding Technology Of LiLium Formolongi

Lilium formolongi was an interspecific hybridization between LiliumLongiflorum and Lilium Formosanum. It is a special and new lily cultivar forcut-flower in China. Bulb formation mechanism and its breeding technology werestudied in present paper. Some factors affecting lily bulb formation weresystematically studied. The growth law of commercial bulb, the correlationcoefficients of main traits, changes of physiology & biochemistry were studied byquatity analysis. The effects of topping technique on bulb growth was alsodiscussed. The initial and develop process of bulbous was studied by anatomyapproach. The results could be summarized as following.(1) The effects of some environmental factors were greatly different on thenumber of bulbous and roots were in scale cutting. The factors included coldstorage, hormone treatment, matrix. The main effects and their interactiveeffects were significant and very significaflt. The effects of genotype weresignificat too.(2) The results showed that growth stages of Lilium formolongi could bedivided properly five stages according to bulbous groWth.(3) There were significant and very significant correlation among bulb traitsand among stem and leave traits and between the two kinds traits. So it waspossible to control the growth of stem and leave to promote the bulb growthtechnically.' (4) Topping was an importan technique in lily bulb production. The resultsshowed that topping in different period made significam infiuence to bulb growth.When fiower buds had aPpeared was the best time for topping.(5) Physiological & biochemical changes of stem-leaves and bulbs indifferent groWth stage had close relationship with exterior characteristics. Theresearch results revealed change laws of sugap starch coniellt and enzymeactivation.(6) The effects of hormone treatment of scale on bulbous formation were studied in thepaper by anatomy technique. ResultS showed that bulbous formation time differed greatly byhormone treatment or not. The bulbous formation cound be divided into 4 different period.