Investigation And Analysis Of Character Diversity In Seedling Population About Ornamental Crabapple

Ornamental crabapple, Malus of Rosaceae, fruit diameter less than 5cm, its branches, leaves, flowers, fruits have a good ornamental value, and resistance to strong. Select good varieties of ornamental crabapple effect, making full ues of its ornamental characteristics, along with other plants in city gardens can enhance the level of urban landscape construction. In this experiment, choosing M.’Snowdrift’, M.’Radiant’, M. ’Royalty’3 varieties as the main parents, open-pollinated and select the plant with rich diversity of traits from the seedlings. The tree species, annual branches, flowering stage, leaf stage, fruit stage and other botanical traits were investigated, and their ornamental value was evaluated, which provided the basis for the selection of varieties. At the same time, the 3 core parents will have selected as the reference group for synchronous investigation, and to make an assessment of the reference. The main results were as follows:1. Investigation on the ornamental crabapple tree form:the test group tree spreading medium trees,90% crabapple tree has a branch shape,52% crabapple annual branches length of diameter of 50.1-70.0cm,50% crabapple annual branch to 4.6-5.5cm, annual branches red-brown color accounted for 76% and strong branch; the reference group 50% annual shoot length of not more than 50cm.2. Investigation on the ornamental crabapple flowering stage morphological:test group 68% crabapple early flowering period from April 22 to April 25,62% crabapple flowering period from April 26 to April 27,54% crabapple flowering days in 8-11d,72% flowers more for white,36% oval petals free,36% oval petals free, each inflorescence flowers number more for 5; reference group 75% crabapple flowers for pink,35% petals eggs round or oval overlap, each inflorescence flowers number more for 4.3. Investigation on the ornamental crabapple leaf stage morphological:crabapple exhibition leaves period young leaves color more bit light green, spring shoots stop long, mature leaves more into green,60% crabapple leaves length for 7.1-8.0cm,70% crabapple leaves width for 4.1-5.0cm, crabapple leaves pointed is sharp or blunt,74% crabapple leaves as sharp teeth,52% crabapple leaf stance for level; reference group 67% young leaves for pink, mature leaves more into green or purple-red,60% crabapple leaves pointed for long tail pointed,54% crabapple leaves are blunt blade,67% leaf form oblique.4. Investigation on the ornamental crabapple fruit maturity form:the test group 58% Begonia fruit in August 30th to September 4th began coloring, from September 27th to October 4th 54% crabapple fruit mature,60% crabapple fruit development days most in 128-133 days, from October 22nd to November 10th,68% crabapple leaves,60% fruit for near round or cylindrical shaped,40% fruit cover color for thick red or orange red,82% fruit no fragrance or flavor; reference group crabapple mature date than group ahead of 2 days,60% fruit is nearly round or oval fruit, no fragrance or flavor.