Effects of Plant Thinning on Clone’s Flowering and Seeding in Chinese Fir Seed Orchard Distribution Characteristics, Flowering and Seeding of Dendrocalamus sinicus in Yunnan, China Plant Regeneration from the Protoplast Culture of Multitiller and Multispike Forage Maize and Seeding of the Regenerated Plant Study on Intensive Breeding Technique of Accelerating Betula platyphylla Flowering and Seeding Early