Study On Observation Of Growth And Development In Seedling Progenies Of Lilium Regale Wilson

The growth dynamics, phenotypic characters, genetic variation and cross breeding of fourth and fifth year of seedling progenies of L. regale cultivated in solar greenhouse and open field were measured and analyzed by field observation. The study aimed to provide theoretical basis for seedling propagation, cross breeding as well as variety breeding of L. regale.1The budding time of seedling progenies in open field was22d earlier than in solar greenhouse, nevertheless their ripening time were almost the same. Under the same cultivation environment, leaf number and leaf area in each5-year-old seedling progenies were obviously bigger than those of4-year-old plants. In each growth year, significant differences were found between the seedling progenies growing in solar greenhouse and open field, with the former showing a higher statistical data in terms of plant height, stem diameter, leaf number, leaf area, width of corolla and length of outer-layer and inner-layer petals. Furthermore, squaring rate and blooming rate corresponding to fourth and fifth-year seedling progenies in open field were9.6%,1.4%and4.5%,3.5%higher than those in solar greenhouse respectively, though the percentages of plant with more than one flower were6.1%and13.5%lower. Similarly, squaring rate and blooming rate of fifth year of plants cultivated in solar greenhouse and open field were30.3%,6.4%and25.2%、8.5%higher, also the proportions of plant with more than one flower were25.9%and18.5%higher than those of fourth year of plants. In contrast to solar greenhouse, seedling progenies growing in open field were easier to get through the juvenile phase, and vegetative growth was more vigorous of fourth year than fifth year of seedling progenies in both cultivation environments. In the fifth year, not all the individuals of the population have fully passed through juvenile phase yet.2Under two cultivation environments, marked or highly marked correlation were showed between index of height, stem diameter, number of leaves, leaf area and index of bulbs, which means expected phenotypic characters of plants can be got by chosing bulbs.3In each cultivation environments, fourh year and fifth year seedling progenies showed much variation. The result showed that variation of nutritive organs (height, stem diameter, numbers of leaves and leaf area) were more than reproductive organs, and the varaiton degree in nutritive organs from higher to lower was that leaf area, numbers of leaves, height, stem diameter, similarly in reproductive organs was that length of style, width of anther, length of anther, length of filament, width of medials petals, length of medial petals, width of lateral petals, length of lateral petals, vertical diameter of corolla, diameter of corolla, the variation of seedling progenies planted in solar greenhouse is greater than that planted in the open field and under one cultivation environment the variation of fifth year of seedling progenies were greater than that of fourth year.4The hybridization in L.regale showed that the combination of L.regale×Lilium leucanthum has the highest percentage of fertile fruit84.4%, while Siberia×L.regale showed the lowest1.8%, the reciprocal cross of L.regale and L.leucanthum had got embryos seeds, the two combination were both1%. In contrast, other combinations didn’t got embryos seeds.The result indicated that the way of generative progagation is feasible and the seedling progenies can be widely used in landscape application; the phenotypic traits of the seedling progenies have variation of different degree, which provided the direction for breeding. The hybridation of L.regale indicated that hybrid progenies could be got only using special technology.